using torrent apps crashes rpi #56
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I experienced this "bug" with the official Debian squeeze image and with the official Debian wheezy image (Raspbian). |
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There is a log attached by another user with the same problem here: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=66&t=11658 |
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Also found this thread, some users have been trying a lot of images and keep having the same problem: |
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I guess the following is the same issue, could someone merge or close this one? |
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Seems true, then close this thread! |
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When CMA fails to initialize in v3.12-rc4, the chipidea driver oopses the kernel while trying to remove and put the HCD which doesn't exist: WARNING: CPU: 0 PID: 6 at /home/rmk/git/linux-rmk/arch/arm/mm/dma-mapping.c:511 __dma_alloc+0x200/0x240() coherent pool not initialised! Modules linked in: CPU: 0 PID: 6 Comm: kworker/u2:0 Tainted: G W 3.12.0-rc4+ #56 Workqueue: deferwq deferred_probe_work_func Backtrace: [<c001218c>] (dump_backtrace+0x0/0x10c) from [<c0012328>] (show_stack+0x18/0x1c) r6:c05fd9cc r5:000001ff r4:00000000 r3:df86ad00 [<c0012310>] (show_stack+0x0/0x1c) from [<c05f3a4c>] (dump_stack+0x70/0x8c) [<c05f39dc>] (dump_stack+0x0/0x8c) from [<c00230a8>] (warn_slowpath_common+0x6c/0x8c) r4:df883a60 r3:df86ad00 [<c002303c>] (warn_slowpath_common+0x0/0x8c) from [<c002316c>] (warn_slowpath_fmt+0x38/0x40) r8:ffffffff r7:00001000 r6:c083b808 r5:00000000 r4:df2efe80 [<c0023134>] (warn_slowpath_fmt+0x0/0x40) from [<c00196bc>] (__dma_alloc+0x200/0x240) r3:00000000 r2:c05fda00 [<c00194bc>] (__dma_alloc+0x0/0x240) from [<c001982c>] (arm_dma_alloc+0x88/0xa0) [<c00197a4>] (arm_dma_alloc+0x0/0xa0) from [<c03e2904>] (ehci_setup+0x1f4/0x438) [<c03e2710>] (ehci_setup+0x0/0x438) from [<c03cbd60>] (usb_add_hcd+0x18c/0x664) [<c03cbbd4>] (usb_add_hcd+0x0/0x664) from [<c03e89f4>] (host_start+0xf0/0x180) [<c03e8904>] (host_start+0x0/0x180) from [<c03e7c34>] (ci_hdrc_probe+0x360/0x670 ) r6:df2ef410 r5:00000000 r4:df2c3010 r3:c03e8904 [<c03e78d4>] (ci_hdrc_probe+0x0/0x670) from [<c0311044>] (platform_drv_probe+0x20/0x24) [<c0311024>] (platform_drv_probe+0x0/0x24) from [<c030fcac>] (driver_probe_device+0x9c/0x234) ... ---[ end trace c88ccaf3969e8422 ]--- Unable to handle kernel NULL pointer dereference at virtual address 00000028 pgd = c0004000 [00000028] *pgd=00000000 Internal error: Oops: 17 [#1] SMP ARM Modules linked in: CPU: 0 PID: 6 Comm: kworker/u2:0 Tainted: G W 3.12.0-rc4+ #56 Workqueue: deferwq deferred_probe_work_func task: df86ad00 ti: df882000 task.ti: df882000 PC is at usb_remove_hcd+0x10/0x150 LR is at host_stop+0x1c/0x3c pc : [<c03cacec>] lr : [<c03e88e4>] psr: 60000013 sp : df883b50 ip : df883b78 fp : df883b74 r10: c11f4c54 r9 : c0836450 r8 : df30c400 r7 : fffffff4 r6 : df2ef410 r5 : 00000000 r4 : df2c3010 r3 : 00000000 r2 : 00000000 r1 : df86b0a0 r0 : 00000000 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel Control: 10c53c7d Table: 2f29404a DAC: 00000015 Process kworker/u2:0 (pid: 6, stack limit = 0xdf882240) Stack: (0xdf883b50 to 0xdf884000) ... Backtrace: [<c03cacdc>] (usb_remove_hcd+0x0/0x150) from [<c03e88e4>] (host_stop+0x1c/0x3c) r6:df2ef410 r5:00000000 r4:df2c3010 [<c03e88c8>] (host_stop+0x0/0x3c) from [<c03e8aa0>] (ci_hdrc_host_destroy+0x1c/0x20) r5:00000000 r4:df2c3010 [<c03e8a84>] (ci_hdrc_host_destroy+0x0/0x20) from [<c03e7c80>] (ci_hdrc_probe+0x3ac/0x670) [<c03e78d4>] (ci_hdrc_probe+0x0/0x670) from [<c0311044>] (platform_drv_probe+0x20/0x24) [<c0311024>] (platform_drv_probe+0x0/0x24) from [<c030fcac>] (driver_probe_device+0x9c/0x234) [<c030fc10>] (driver_probe_device+0x0/0x234) from [<c030ff28>] (__device_attach+0x44/0x48) ... ---[ end trace c88ccaf3969e8423 ]--- Fix this so at least we can continue booting and get to a shell prompt. Signed-off-by: Russell King <[email protected]> Tested-by: Russell King <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
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The following warning was triggered by missing srcu locks around the storage key handling functions. ============================= WARNING: suspicious RCU usage 4.12.0+ #56 Not tainted ----------------------------- ./include/linux/kvm_host.h:572 suspicious rcu_dereference_check() usage! rcu_scheduler_active = 2, debug_locks = 1 1 lock held by live_migration/4936: #0: (&mm->mmap_sem){++++++}, at: [<0000000000141be0>] kvm_arch_vm_ioctl+0x6b8/0x22d0 CPU: 8 PID: 4936 Comm: live_migration Not tainted 4.12.0+ #56 Hardware name: IBM 2964 NC9 704 (LPAR) Call Trace: ([<000000000011378a>] show_stack+0xea/0xf0) [<000000000055cc4c>] dump_stack+0x94/0xd8 [<000000000012ee70>] gfn_to_memslot+0x1a0/0x1b8 [<0000000000130b76>] gfn_to_hva+0x2e/0x48 [<0000000000141c3c>] kvm_arch_vm_ioctl+0x714/0x22d0 [<000000000013306c>] kvm_vm_ioctl+0x11c/0x7b8 [<000000000037e2c0>] do_vfs_ioctl+0xa8/0x6c8 [<000000000037e984>] SyS_ioctl+0xa4/0xb8 [<00000000008b20a4>] system_call+0xc4/0x27c 1 lock held by live_migration/4936: #0: (&mm->mmap_sem){++++++}, at: [<0000000000141be0>] kvm_arch_vm_ioctl+0x6b8/0x22d0 Signed-off-by: Christian Borntraeger <[email protected]> Reviewed-by: Pierre Morel<[email protected]>
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The below commit added a call to ->destroy() on init failure, but multiq still frees ->queues on error in init, but ->queues is also freed by ->destroy() thus we get double free and corrupted memory. Very easy to reproduce (eth0 not multiqueue): $ tc qdisc add dev eth0 root multiq RTNETLINK answers: Operation not supported $ ip l add dumdum type dummy (crash) Trace log: [ 3929.467747] general protection fault: 0000 [#1] SMP [ 3929.468083] Modules linked in: [ 3929.468302] CPU: 3 PID: 967 Comm: ip Not tainted 4.13.0-rc6+ #56 [ 3929.468625] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 [ 3929.469124] task: ffff88003716a700 task.stack: ffff88005872c000 [ 3929.469449] RIP: 0010:__kmalloc_track_caller+0x117/0x1be [ 3929.469746] RSP: 0018:ffff88005872f6a0 EFLAGS: 00010246 [ 3929.470042] RAX: 00000000000002de RBX: 0000000058a59000 RCX: 00000000000002df [ 3929.470406] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff821f7020 [ 3929.470770] RBP: ffff88005872f6e8 R08: 000000000001f010 R09: 0000000000000000 [ 3929.471133] R10: ffff88005872f730 R11: 0000000000008cdd R12: ff006d75646d7564 [ 3929.471496] R13: 00000000014000c0 R14: ffff88005b403c00 R15: ffff88005b403c00 [ 3929.471869] FS: 00007f0b70480740(0000) GS:ffff88005d980000(0000) knlGS:0000000000000000 [ 3929.472286] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3929.472677] CR2: 00007ffcee4f3000 CR3: 0000000059d45000 CR4: 00000000000406e0 [ 3929.473209] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 3929.474109] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 3929.474873] Call Trace: [ 3929.475337] ? kstrdup_const+0x23/0x25 [ 3929.475863] kstrdup+0x2e/0x4b [ 3929.476338] kstrdup_const+0x23/0x25 [ 3929.478084] __kernfs_new_node+0x28/0xbc [ 3929.478478] kernfs_new_node+0x35/0x55 [ 3929.478929] kernfs_create_link+0x23/0x76 [ 3929.479478] sysfs_do_create_link_sd.isra.2+0x85/0xd7 [ 3929.480096] sysfs_create_link+0x33/0x35 [ 3929.480649] device_add+0x200/0x589 [ 3929.481184] netdev_register_kobject+0x7c/0x12f [ 3929.481711] register_netdevice+0x373/0x471 [ 3929.482174] rtnl_newlink+0x614/0x729 [ 3929.482610] ? rtnl_newlink+0x17f/0x729 [ 3929.483080] rtnetlink_rcv_msg+0x188/0x197 [ 3929.483533] ? rcu_read_unlock+0x3e/0x5f [ 3929.483984] ? rtnl_newlink+0x729/0x729 [ 3929.484420] netlink_rcv_skb+0x6c/0xce [ 3929.484858] rtnetlink_rcv+0x23/0x2a [ 3929.485291] netlink_unicast+0x103/0x181 [ 3929.485735] netlink_sendmsg+0x326/0x337 [ 3929.486181] sock_sendmsg_nosec+0x14/0x3f [ 3929.486614] sock_sendmsg+0x29/0x2e [ 3929.486973] ___sys_sendmsg+0x209/0x28b [ 3929.487340] ? do_raw_spin_unlock+0xcd/0xf8 [ 3929.487719] ? _raw_spin_unlock+0x27/0x31 [ 3929.488092] ? __handle_mm_fault+0x651/0xdb1 [ 3929.488471] ? check_chain_key+0xb0/0xfd [ 3929.488847] __sys_sendmsg+0x45/0x63 [ 3929.489206] ? __sys_sendmsg+0x45/0x63 [ 3929.489576] SyS_sendmsg+0x19/0x1b [ 3929.489901] entry_SYSCALL_64_fastpath+0x23/0xc2 [ 3929.490172] RIP: 0033:0x7f0b6fb93690 [ 3929.490423] RSP: 002b:00007ffcee4ed588 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 3929.490881] RAX: ffffffffffffffda RBX: ffffffff810d278c RCX: 00007f0b6fb93690 [ 3929.491198] RDX: 0000000000000000 RSI: 00007ffcee4ed5d0 RDI: 0000000000000003 [ 3929.491521] RBP: ffff88005872ff98 R08: 0000000000000001 R09: 0000000000000000 [ 3929.491801] R10: 00007ffcee4ed350 R11: 0000000000000246 R12: 0000000000000002 [ 3929.492075] R13: 000000000066f1a0 R14: 00007ffcee4f5680 R15: 0000000000000000 [ 3929.492352] ? trace_hardirqs_off_caller+0xa7/0xcf [ 3929.492590] Code: 8b 45 c0 48 8b 45 b8 74 17 48 8b 4d c8 83 ca ff 44 89 ee 4c 89 f7 e8 83 ca ff ff 49 89 c4 eb 49 49 63 56 20 48 8d 48 01 4d 8b 06 <49> 8b 1c 14 48 89 c2 4c 89 e0 65 49 0f c7 08 0f 94 c0 83 f0 01 [ 3929.493335] RIP: __kmalloc_track_caller+0x117/0x1be RSP: ffff88005872f6a0 Fixes: 87b60cf ("net_sched: fix error recovery at qdisc creation") Fixes: f07d150 ("multiq: Further multiqueue cleanup") Signed-off-by: Nikolay Aleksandrov <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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A CDC Ethernet functional descriptor with wMaxSegmentSize = 0 will cause a divide error in usbnet_probe: divide error: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.0-rc8-44453-g1fdc1a82c34f #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Workqueue: usb_hub_wq hub_event task: ffff88006bef5c00 task.stack: ffff88006bf60000 RIP: 0010:usbnet_update_max_qlen+0x24d/0x390 drivers/net/usb/usbnet.c:355 RSP: 0018:ffff88006bf67508 EFLAGS: 00010246 RAX: 00000000000163c8 RBX: ffff8800621fce40 RCX: ffff8800621fcf34 RDX: 0000000000000000 RSI: ffffffff837ecb7a RDI: ffff8800621fcf34 RBP: ffff88006bf67520 R08: ffff88006bef5c00 R09: ffffed000c43f881 R10: ffffed000c43f880 R11: ffff8800621fc406 R12: 0000000000000003 R13: ffffffff85c71de0 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88006ca00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe9c0d6dac CR3: 00000000614f4000 CR4: 00000000000006f0 Call Trace: usbnet_probe+0x18b5/0x2790 drivers/net/usb/usbnet.c:1783 qmi_wwan_probe+0x133/0x220 drivers/net/usb/qmi_wwan.c:1338 usb_probe_interface+0x324/0x940 drivers/usb/core/driver.c:361 really_probe drivers/base/dd.c:413 driver_probe_device+0x522/0x740 drivers/base/dd.c:557 Fix by simply ignoring the bogus descriptor, as it is optional for QMI devices anyway. Fixes: 423ce8c ("net: usb: qmi_wwan: New driver for Huawei QMI based WWAN devices") Reported-by: Andrey Konovalov <[email protected]> Signed-off-by: Bjørn Mork <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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[ Upstream commit 7fd0783 ] A CDC Ethernet functional descriptor with wMaxSegmentSize = 0 will cause a divide error in usbnet_probe: divide error: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.0-rc8-44453-g1fdc1a82c34f #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Workqueue: usb_hub_wq hub_event task: ffff88006bef5c00 task.stack: ffff88006bf60000 RIP: 0010:usbnet_update_max_qlen+0x24d/0x390 drivers/net/usb/usbnet.c:355 RSP: 0018:ffff88006bf67508 EFLAGS: 00010246 RAX: 00000000000163c8 RBX: ffff8800621fce40 RCX: ffff8800621fcf34 RDX: 0000000000000000 RSI: ffffffff837ecb7a RDI: ffff8800621fcf34 RBP: ffff88006bf67520 R08: ffff88006bef5c00 R09: ffffed000c43f881 R10: ffffed000c43f880 R11: ffff8800621fc406 R12: 0000000000000003 R13: ffffffff85c71de0 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88006ca00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe9c0d6dac CR3: 00000000614f4000 CR4: 00000000000006f0 Call Trace: usbnet_probe+0x18b5/0x2790 drivers/net/usb/usbnet.c:1783 qmi_wwan_probe+0x133/0x220 drivers/net/usb/qmi_wwan.c:1338 usb_probe_interface+0x324/0x940 drivers/usb/core/driver.c:361 really_probe drivers/base/dd.c:413 driver_probe_device+0x522/0x740 drivers/base/dd.c:557 Fix by simply ignoring the bogus descriptor, as it is optional for QMI devices anyway. Fixes: 423ce8c ("net: usb: qmi_wwan: New driver for Huawei QMI based WWAN devices") Reported-by: Andrey Konovalov <[email protected]> Signed-off-by: Bjørn Mork <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
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[ Upstream commit 7fd0783 ] A CDC Ethernet functional descriptor with wMaxSegmentSize = 0 will cause a divide error in usbnet_probe: divide error: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.14.0-rc8-44453-g1fdc1a82c34f #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Workqueue: usb_hub_wq hub_event task: ffff88006bef5c00 task.stack: ffff88006bf60000 RIP: 0010:usbnet_update_max_qlen+0x24d/0x390 drivers/net/usb/usbnet.c:355 RSP: 0018:ffff88006bf67508 EFLAGS: 00010246 RAX: 00000000000163c8 RBX: ffff8800621fce40 RCX: ffff8800621fcf34 RDX: 0000000000000000 RSI: ffffffff837ecb7a RDI: ffff8800621fcf34 RBP: ffff88006bf67520 R08: ffff88006bef5c00 R09: ffffed000c43f881 R10: ffffed000c43f880 R11: ffff8800621fc406 R12: 0000000000000003 R13: ffffffff85c71de0 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88006ca00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe9c0d6dac CR3: 00000000614f4000 CR4: 00000000000006f0 Call Trace: usbnet_probe+0x18b5/0x2790 drivers/net/usb/usbnet.c:1783 qmi_wwan_probe+0x133/0x220 drivers/net/usb/qmi_wwan.c:1338 usb_probe_interface+0x324/0x940 drivers/usb/core/driver.c:361 really_probe drivers/base/dd.c:413 driver_probe_device+0x522/0x740 drivers/base/dd.c:557 Fix by simply ignoring the bogus descriptor, as it is optional for QMI devices anyway. Fixes: 423ce8c ("net: usb: qmi_wwan: New driver for Huawei QMI based WWAN devices") Reported-by: Andrey Konovalov <[email protected]> Signed-off-by: Bjørn Mork <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
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The race is between lookup_get_idr_uobject and uverbs_idr_remove_uobj -> uverbs_uobject_put. We deliberately do not call sychronize_rcu after the idr_remove in uverbs_idr_remove_uobj for performance reasons, instead we call kfree_rcu() during uverbs_uobject_put. However, this means we can obtain pointers to uobj's that have already been released and must protect against krefing them using kref_get_unless_zero. ================================================================== BUG: KASAN: use-after-free in copy_ah_attr_from_uverbs.isra.2+0x860/0xa00 Read of size 4 at addr ffff88005fda1ac8 by task syz-executor2/441 CPU: 1 PID: 441 Comm: syz-executor2 Not tainted 4.15.0-rc2+ #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014 Call Trace: dump_stack+0x8d/0xd4 print_address_description+0x73/0x290 kasan_report+0x25c/0x370 ? copy_ah_attr_from_uverbs.isra.2+0x860/0xa00 copy_ah_attr_from_uverbs.isra.2+0x860/0xa00 ? uverbs_try_lock_object+0x68/0xc0 ? modify_qp.isra.7+0xdc4/0x10e0 modify_qp.isra.7+0xdc4/0x10e0 ib_uverbs_modify_qp+0xfe/0x170 ? ib_uverbs_query_qp+0x970/0x970 ? __lock_acquire+0xa11/0x1da0 ib_uverbs_write+0x55a/0xad0 ? ib_uverbs_query_qp+0x970/0x970 ? ib_uverbs_query_qp+0x970/0x970 ? ib_uverbs_open+0x760/0x760 ? futex_wake+0x147/0x410 ? sched_clock_cpu+0x18/0x180 ? check_prev_add+0x1680/0x1680 ? do_futex+0x3b6/0xa30 ? sched_clock_cpu+0x18/0x180 __vfs_write+0xf7/0x5c0 ? ib_uverbs_open+0x760/0x760 ? kernel_read+0x110/0x110 ? lock_acquire+0x370/0x370 ? __fget+0x264/0x3b0 vfs_write+0x18a/0x460 SyS_write+0xc7/0x1a0 ? SyS_read+0x1a0/0x1a0 ? trace_hardirqs_on_thunk+0x1a/0x1c entry_SYSCALL_64_fastpath+0x18/0x85 RIP: 0033:0x448e29 RSP: 002b:00007f443fee0c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f443fee16bc RCX: 0000000000448e29 RDX: 0000000000000078 RSI: 00000000209f8000 RDI: 0000000000000012 RBP: 000000000070bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000008e98 R14: 00000000006ebf38 R15: 0000000000000000 Allocated by task 1: kmem_cache_alloc_trace+0x16c/0x2f0 mlx5_alloc_cmd_msg+0x12e/0x670 cmd_exec+0x419/0x1810 mlx5_cmd_exec+0x40/0x70 mlx5_core_mad_ifc+0x187/0x220 mlx5_MAD_IFC+0xd7/0x1b0 mlx5_query_mad_ifc_gids+0x1f3/0x650 mlx5_ib_query_gid+0xa4/0xc0 ib_query_gid+0x152/0x1a0 ib_query_port+0x21e/0x290 mlx5_port_immutable+0x30f/0x490 ib_register_device+0x5dd/0x1130 mlx5_ib_add+0x3e7/0x700 mlx5_add_device+0x124/0x510 mlx5_register_interface+0x11f/0x1c0 mlx5_ib_init+0x56/0x61 do_one_initcall+0xa3/0x250 kernel_init_freeable+0x309/0x3b8 kernel_init+0x14/0x180 ret_from_fork+0x24/0x30 Freed by task 1: kfree+0xeb/0x2f0 mlx5_free_cmd_msg+0xcd/0x140 cmd_exec+0xeba/0x1810 mlx5_cmd_exec+0x40/0x70 mlx5_core_mad_ifc+0x187/0x220 mlx5_MAD_IFC+0xd7/0x1b0 mlx5_query_mad_ifc_gids+0x1f3/0x650 mlx5_ib_query_gid+0xa4/0xc0 ib_query_gid+0x152/0x1a0 ib_query_port+0x21e/0x290 mlx5_port_immutable+0x30f/0x490 ib_register_device+0x5dd/0x1130 mlx5_ib_add+0x3e7/0x700 mlx5_add_device+0x124/0x510 mlx5_register_interface+0x11f/0x1c0 mlx5_ib_init+0x56/0x61 do_one_initcall+0xa3/0x250 kernel_init_freeable+0x309/0x3b8 kernel_init+0x14/0x180 ret_from_fork+0x24/0x30 The buggy address belongs to the object at ffff88005fda1ab0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 24 bytes inside of 32-byte region [ffff88005fda1ab0, ffff88005fda1ad0) The buggy address belongs to the page: page:00000000d5655c19 count:1 mapcount:0 mapping: (null) index:0xffff88005fda1fc0 flags: 0x4000000000000100(slab) raw: 4000000000000100 0000000000000000 ffff88005fda1fc0 0000000180550008 raw: ffffea00017f6780 0000000400000004 ffff88006c803980 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88005fda1980: fc fc fb fb fb fb fc fc fb fb fb fb fc fc fb fb ffff88005fda1a00: fb fb fc fc fb fb fb fb fc fc 00 00 00 00 fc fc ffff88005fda1a80: fb fb fb fb fc fc fb fb fb fb fc fc fb fb fb fb ffff88005fda1b00: fc fc 00 00 00 00 fc fc fb fb fb fb fc fc fb fb ffff88005fda1b80: fb fb fc fc fb fb fb fb fc fc fb fb fb fb fc fc ==================================================================@ Cc: syzkaller <[email protected]> Cc: <[email protected]> # 4.11 Fixes: 3832125 ("IB/core: Add support for idr types") Reported-by: Noa Osherovich <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
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Mar 3, 2018
commit 6623e3e upstream. The race is between lookup_get_idr_uobject and uverbs_idr_remove_uobj -> uverbs_uobject_put. We deliberately do not call sychronize_rcu after the idr_remove in uverbs_idr_remove_uobj for performance reasons, instead we call kfree_rcu() during uverbs_uobject_put. However, this means we can obtain pointers to uobj's that have already been released and must protect against krefing them using kref_get_unless_zero. ================================================================== BUG: KASAN: use-after-free in copy_ah_attr_from_uverbs.isra.2+0x860/0xa00 Read of size 4 at addr ffff88005fda1ac8 by task syz-executor2/441 CPU: 1 PID: 441 Comm: syz-executor2 Not tainted 4.15.0-rc2+ raspberrypi#56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014 Call Trace: dump_stack+0x8d/0xd4 print_address_description+0x73/0x290 kasan_report+0x25c/0x370 ? copy_ah_attr_from_uverbs.isra.2+0x860/0xa00 copy_ah_attr_from_uverbs.isra.2+0x860/0xa00 ? uverbs_try_lock_object+0x68/0xc0 ? modify_qp.isra.7+0xdc4/0x10e0 modify_qp.isra.7+0xdc4/0x10e0 ib_uverbs_modify_qp+0xfe/0x170 ? ib_uverbs_query_qp+0x970/0x970 ? __lock_acquire+0xa11/0x1da0 ib_uverbs_write+0x55a/0xad0 ? ib_uverbs_query_qp+0x970/0x970 ? ib_uverbs_query_qp+0x970/0x970 ? ib_uverbs_open+0x760/0x760 ? futex_wake+0x147/0x410 ? sched_clock_cpu+0x18/0x180 ? check_prev_add+0x1680/0x1680 ? do_futex+0x3b6/0xa30 ? sched_clock_cpu+0x18/0x180 __vfs_write+0xf7/0x5c0 ? ib_uverbs_open+0x760/0x760 ? kernel_read+0x110/0x110 ? lock_acquire+0x370/0x370 ? __fget+0x264/0x3b0 vfs_write+0x18a/0x460 SyS_write+0xc7/0x1a0 ? SyS_read+0x1a0/0x1a0 ? trace_hardirqs_on_thunk+0x1a/0x1c entry_SYSCALL_64_fastpath+0x18/0x85 RIP: 0033:0x448e29 RSP: 002b:00007f443fee0c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f443fee16bc RCX: 0000000000448e29 RDX: 0000000000000078 RSI: 00000000209f8000 RDI: 0000000000000012 RBP: 000000000070bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000008e98 R14: 00000000006ebf38 R15: 0000000000000000 Allocated by task 1: kmem_cache_alloc_trace+0x16c/0x2f0 mlx5_alloc_cmd_msg+0x12e/0x670 cmd_exec+0x419/0x1810 mlx5_cmd_exec+0x40/0x70 mlx5_core_mad_ifc+0x187/0x220 mlx5_MAD_IFC+0xd7/0x1b0 mlx5_query_mad_ifc_gids+0x1f3/0x650 mlx5_ib_query_gid+0xa4/0xc0 ib_query_gid+0x152/0x1a0 ib_query_port+0x21e/0x290 mlx5_port_immutable+0x30f/0x490 ib_register_device+0x5dd/0x1130 mlx5_ib_add+0x3e7/0x700 mlx5_add_device+0x124/0x510 mlx5_register_interface+0x11f/0x1c0 mlx5_ib_init+0x56/0x61 do_one_initcall+0xa3/0x250 kernel_init_freeable+0x309/0x3b8 kernel_init+0x14/0x180 ret_from_fork+0x24/0x30 Freed by task 1: kfree+0xeb/0x2f0 mlx5_free_cmd_msg+0xcd/0x140 cmd_exec+0xeba/0x1810 mlx5_cmd_exec+0x40/0x70 mlx5_core_mad_ifc+0x187/0x220 mlx5_MAD_IFC+0xd7/0x1b0 mlx5_query_mad_ifc_gids+0x1f3/0x650 mlx5_ib_query_gid+0xa4/0xc0 ib_query_gid+0x152/0x1a0 ib_query_port+0x21e/0x290 mlx5_port_immutable+0x30f/0x490 ib_register_device+0x5dd/0x1130 mlx5_ib_add+0x3e7/0x700 mlx5_add_device+0x124/0x510 mlx5_register_interface+0x11f/0x1c0 mlx5_ib_init+0x56/0x61 do_one_initcall+0xa3/0x250 kernel_init_freeable+0x309/0x3b8 kernel_init+0x14/0x180 ret_from_fork+0x24/0x30 The buggy address belongs to the object at ffff88005fda1ab0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 24 bytes inside of 32-byte region [ffff88005fda1ab0, ffff88005fda1ad0) The buggy address belongs to the page: page:00000000d5655c19 count:1 mapcount:0 mapping: (null) index:0xffff88005fda1fc0 flags: 0x4000000000000100(slab) raw: 4000000000000100 0000000000000000 ffff88005fda1fc0 0000000180550008 raw: ffffea00017f6780 0000000400000004 ffff88006c803980 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88005fda1980: fc fc fb fb fb fb fc fc fb fb fb fb fc fc fb fb ffff88005fda1a00: fb fb fc fc fb fb fb fb fc fc 00 00 00 00 fc fc ffff88005fda1a80: fb fb fb fb fc fc fb fb fb fb fc fc fb fb fb fb ffff88005fda1b00: fc fc 00 00 00 00 fc fc fb fb fb fb fc fc fb fb ffff88005fda1b80: fb fb fc fc fb fb fb fb fc fc fb fb fb fb fc fc ==================================================================@ Cc: syzkaller <[email protected]> Cc: <[email protected]> # 4.11 Fixes: 3832125 ("IB/core: Add support for idr types") Reported-by: Noa Osherovich <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Mar 8, 2018
commit 6623e3e upstream. The race is between lookup_get_idr_uobject and uverbs_idr_remove_uobj -> uverbs_uobject_put. We deliberately do not call sychronize_rcu after the idr_remove in uverbs_idr_remove_uobj for performance reasons, instead we call kfree_rcu() during uverbs_uobject_put. However, this means we can obtain pointers to uobj's that have already been released and must protect against krefing them using kref_get_unless_zero. ================================================================== BUG: KASAN: use-after-free in copy_ah_attr_from_uverbs.isra.2+0x860/0xa00 Read of size 4 at addr ffff88005fda1ac8 by task syz-executor2/441 CPU: 1 PID: 441 Comm: syz-executor2 Not tainted 4.15.0-rc2+ #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014 Call Trace: dump_stack+0x8d/0xd4 print_address_description+0x73/0x290 kasan_report+0x25c/0x370 ? copy_ah_attr_from_uverbs.isra.2+0x860/0xa00 copy_ah_attr_from_uverbs.isra.2+0x860/0xa00 ? uverbs_try_lock_object+0x68/0xc0 ? modify_qp.isra.7+0xdc4/0x10e0 modify_qp.isra.7+0xdc4/0x10e0 ib_uverbs_modify_qp+0xfe/0x170 ? ib_uverbs_query_qp+0x970/0x970 ? __lock_acquire+0xa11/0x1da0 ib_uverbs_write+0x55a/0xad0 ? ib_uverbs_query_qp+0x970/0x970 ? ib_uverbs_query_qp+0x970/0x970 ? ib_uverbs_open+0x760/0x760 ? futex_wake+0x147/0x410 ? sched_clock_cpu+0x18/0x180 ? check_prev_add+0x1680/0x1680 ? do_futex+0x3b6/0xa30 ? sched_clock_cpu+0x18/0x180 __vfs_write+0xf7/0x5c0 ? ib_uverbs_open+0x760/0x760 ? kernel_read+0x110/0x110 ? lock_acquire+0x370/0x370 ? __fget+0x264/0x3b0 vfs_write+0x18a/0x460 SyS_write+0xc7/0x1a0 ? SyS_read+0x1a0/0x1a0 ? trace_hardirqs_on_thunk+0x1a/0x1c entry_SYSCALL_64_fastpath+0x18/0x85 RIP: 0033:0x448e29 RSP: 002b:00007f443fee0c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f443fee16bc RCX: 0000000000448e29 RDX: 0000000000000078 RSI: 00000000209f8000 RDI: 0000000000000012 RBP: 000000000070bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000008e98 R14: 00000000006ebf38 R15: 0000000000000000 Allocated by task 1: kmem_cache_alloc_trace+0x16c/0x2f0 mlx5_alloc_cmd_msg+0x12e/0x670 cmd_exec+0x419/0x1810 mlx5_cmd_exec+0x40/0x70 mlx5_core_mad_ifc+0x187/0x220 mlx5_MAD_IFC+0xd7/0x1b0 mlx5_query_mad_ifc_gids+0x1f3/0x650 mlx5_ib_query_gid+0xa4/0xc0 ib_query_gid+0x152/0x1a0 ib_query_port+0x21e/0x290 mlx5_port_immutable+0x30f/0x490 ib_register_device+0x5dd/0x1130 mlx5_ib_add+0x3e7/0x700 mlx5_add_device+0x124/0x510 mlx5_register_interface+0x11f/0x1c0 mlx5_ib_init+0x56/0x61 do_one_initcall+0xa3/0x250 kernel_init_freeable+0x309/0x3b8 kernel_init+0x14/0x180 ret_from_fork+0x24/0x30 Freed by task 1: kfree+0xeb/0x2f0 mlx5_free_cmd_msg+0xcd/0x140 cmd_exec+0xeba/0x1810 mlx5_cmd_exec+0x40/0x70 mlx5_core_mad_ifc+0x187/0x220 mlx5_MAD_IFC+0xd7/0x1b0 mlx5_query_mad_ifc_gids+0x1f3/0x650 mlx5_ib_query_gid+0xa4/0xc0 ib_query_gid+0x152/0x1a0 ib_query_port+0x21e/0x290 mlx5_port_immutable+0x30f/0x490 ib_register_device+0x5dd/0x1130 mlx5_ib_add+0x3e7/0x700 mlx5_add_device+0x124/0x510 mlx5_register_interface+0x11f/0x1c0 mlx5_ib_init+0x56/0x61 do_one_initcall+0xa3/0x250 kernel_init_freeable+0x309/0x3b8 kernel_init+0x14/0x180 ret_from_fork+0x24/0x30 The buggy address belongs to the object at ffff88005fda1ab0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 24 bytes inside of 32-byte region [ffff88005fda1ab0, ffff88005fda1ad0) The buggy address belongs to the page: page:00000000d5655c19 count:1 mapcount:0 mapping: (null) index:0xffff88005fda1fc0 flags: 0x4000000000000100(slab) raw: 4000000000000100 0000000000000000 ffff88005fda1fc0 0000000180550008 raw: ffffea00017f6780 0000000400000004 ffff88006c803980 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88005fda1980: fc fc fb fb fb fb fc fc fb fb fb fb fc fc fb fb ffff88005fda1a00: fb fb fc fc fb fb fb fb fc fc 00 00 00 00 fc fc ffff88005fda1a80: fb fb fb fb fc fc fb fb fb fb fc fc fb fb fb fb ffff88005fda1b00: fc fc 00 00 00 00 fc fc fb fb fb fb fc fc fb fb ffff88005fda1b80: fb fb fc fc fb fb fb fb fc fc fb fb fb fb fc fc ==================================================================@ Cc: syzkaller <[email protected]> Cc: <[email protected]> # 4.11 Fixes: 3832125 ("IB/core: Add support for idr types") Reported-by: Noa Osherovich <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
sigmaris
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to sigmaris/linux
that referenced
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Feb 9, 2020
…isten() With multi-transport support, listener sockets are not bound to any transport. So, calling virtio_transport_reset(), when an error occurs, on a listener socket produces the following null-pointer dereference: BUG: kernel NULL pointer dereference, address: 00000000000000e8 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [raspberrypi#1] SMP PTI CPU: 0 PID: 20 Comm: kworker/0:1 Not tainted 5.5.0-rc1-ste-00003-gb4be21f316ac-dirty raspberrypi#56 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 Workqueue: virtio_vsock virtio_transport_rx_work [vmw_vsock_virtio_transport] RIP: 0010:virtio_transport_send_pkt_info+0x20/0x130 [vmw_vsock_virtio_transport_common] Code: 1f 84 00 00 00 00 00 0f 1f 00 55 48 89 e5 41 57 41 56 41 55 49 89 f5 41 54 49 89 fc 53 48 83 ec 10 44 8b 76 20 e8 c0 ba fe ff <48> 8b 80 e8 00 00 00 e8 64 e3 7d c1 45 8b 45 00 41 8b 8c 24 d4 02 RSP: 0018:ffffc900000b7d08 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff88807bf12728 RCX: 0000000000000000 RDX: ffff88807bf12700 RSI: ffffc900000b7d50 RDI: ffff888035c84000 RBP: ffffc900000b7d40 R08: ffff888035c84000 R09: ffffc900000b7d08 R10: ffff8880781de800 R11: 0000000000000018 R12: ffff888035c84000 R13: ffffc900000b7d50 R14: 0000000000000000 R15: ffff88807bf12724 FS: 0000000000000000(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000e8 CR3: 00000000790f4004 CR4: 0000000000160ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: virtio_transport_reset+0x59/0x70 [vmw_vsock_virtio_transport_common] virtio_transport_recv_pkt+0x5bb/0xe50 [vmw_vsock_virtio_transport_common] ? detach_buf_split+0xf1/0x130 virtio_transport_rx_work+0xba/0x130 [vmw_vsock_virtio_transport] process_one_work+0x1c0/0x300 worker_thread+0x45/0x3c0 kthread+0xfc/0x130 ? current_work+0x40/0x40 ? kthread_park+0x90/0x90 ret_from_fork+0x35/0x40 Modules linked in: sunrpc kvm_intel kvm vmw_vsock_virtio_transport vmw_vsock_virtio_transport_common irqbypass vsock virtio_rng rng_core CR2: 00000000000000e8 ---[ end trace e75400e2ea2fa824 ]--- This happens because virtio_transport_reset() calls virtio_transport_send_pkt_info() that can be used only on connecting/connected sockets. This patch fixes the issue, using virtio_transport_reset_no_sock() instead of virtio_transport_reset() when we are handling a listener socket. Fixes: c0cfa2d ("vsock: add multi-transports support") Signed-off-by: Stefano Garzarella <[email protected]> Signed-off-by: David S. Miller <[email protected]>
popcornmix
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Jan 25, 2021
I was hitting the below panic continuously when attaching kprobes to scheduler functions [ 159.045212] Unexpected kernel BRK exception at EL1 [ 159.053753] Internal error: BRK handler: f2000006 [#1] PREEMPT SMP [ 159.059954] Modules linked in: [ 159.063025] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 5.11.0-rc4-00008-g1e2a199f6ccd #56 [rt-app] <notice> [1] Exiting.[ 159.071166] Hardware name: ARM Juno development board (r2) (DT) [ 159.079689] pstate: 600003c5 (nZCv DAIF -PAN -UAO -TCO BTYPE=--) [ 159.085723] pc : 0xffff80001624501c [ 159.089377] lr : attach_entity_load_avg+0x2ac/0x350 [ 159.094271] sp : ffff80001622b640 [rt-app] <notice> [0] Exiting.[ 159.097591] x29: ffff80001622b640 x28: 0000000000000001 [ 159.105515] x27: 0000000000000049 x26: ffff000800b79980 [ 159.110847] x25: ffff00097ef37840 x24: 0000000000000000 [ 159.116331] x23: 00000024eacec1ec x22: ffff00097ef12b90 [ 159.121663] x21: ffff00097ef37700 x20: ffff800010119170 [rt-app] <notice> [11] Exiting.[ 159.126995] x19: ffff00097ef37840 x18: 000000000000000e [ 159.135003] x17: 0000000000000001 x16: 0000000000000019 [ 159.140335] x15: 0000000000000000 x14: 0000000000000000 [ 159.145666] x13: 0000000000000002 x12: 0000000000000002 [ 159.150996] x11: ffff80001592f9f0 x10: 0000000000000060 [ 159.156327] x9 : ffff8000100f6f9c x8 : be618290de0999a1 [ 159.161659] x7 : ffff80096a4b1000 x6 : 0000000000000000 [ 159.166990] x5 : ffff00097ef37840 x4 : 0000000000000000 [ 159.172321] x3 : ffff000800328948 x2 : 0000000000000000 [ 159.177652] x1 : 0000002507d52fec x0 : ffff00097ef12b90 [ 159.182983] Call trace: [ 159.185433] 0xffff80001624501c [ 159.188581] update_load_avg+0x2d0/0x778 [ 159.192516] enqueue_task_fair+0x134/0xe20 [ 159.196625] enqueue_task+0x4c/0x2c8 [ 159.200211] ttwu_do_activate+0x70/0x138 [ 159.204147] sched_ttwu_pending+0xbc/0x160 [ 159.208253] flush_smp_call_function_queue+0x16c/0x320 [ 159.213408] generic_smp_call_function_single_interrupt+0x1c/0x28 [ 159.219521] ipi_handler+0x1e8/0x3c8 [ 159.223106] handle_percpu_devid_irq+0xd8/0x460 [ 159.227650] generic_handle_irq+0x38/0x50 [ 159.231672] __handle_domain_irq+0x6c/0xc8 [ 159.235781] gic_handle_irq+0xcc/0xf0 [ 159.239452] el1_irq+0xb4/0x180 [ 159.242600] rcu_is_watching+0x28/0x70 [ 159.246359] rcu_read_lock_held_common+0x44/0x88 [ 159.250991] rcu_read_lock_any_held+0x30/0xc0 [ 159.255360] kretprobe_dispatcher+0xc4/0xf0 [ 159.259555] __kretprobe_trampoline_handler+0xc0/0x150 [ 159.264710] trampoline_probe_handler+0x38/0x58 [ 159.269255] kretprobe_trampoline+0x70/0xc4 [ 159.273450] run_rebalance_domains+0x54/0x80 [ 159.277734] __do_softirq+0x164/0x684 [ 159.281406] irq_exit+0x198/0x1b8 [ 159.284731] __handle_domain_irq+0x70/0xc8 [ 159.288840] gic_handle_irq+0xb0/0xf0 [ 159.292510] el1_irq+0xb4/0x180 [ 159.295658] arch_cpu_idle+0x18/0x28 [ 159.299245] default_idle_call+0x9c/0x3e8 [ 159.303265] do_idle+0x25c/0x2a8 [ 159.306502] cpu_startup_entry+0x2c/0x78 [ 159.310436] secondary_start_kernel+0x160/0x198 [ 159.314984] Code: d42000c0 aa1e03e9 d42000c0 aa1e03e9 (d42000c0) After a bit of head scratching and debugging it turned out that it is due to kprobe handler being interrupted by a tick that causes us to go into (I think another) kprobe handler. The culprit was kprobe_breakpoint_ss_handler() returning DBG_HOOK_ERROR which leads to the Unexpected kernel BRK exception. Reverting commit ba090f9 ("arm64: kprobes: Remove redundant kprobe_step_ctx") seemed to fix the problem for me. Further analysis showed that kcb->kprobe_status is set to KPROBE_REENTER when the error occurs. By teaching kprobe_breakpoint_ss_handler() to handle this status I can no longer reproduce the problem. Fixes: ba090f9 ("arm64: kprobes: Remove redundant kprobe_step_ctx") Signed-off-by: Qais Yousef <[email protected]> Acked-by: Will Deacon <[email protected]> Acked-by: Masami Hiramatsu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Catalin Marinas <[email protected]>
JanKehren
pushed a commit
to emteria/kernel_brcm_rpi
that referenced
this issue
Mar 5, 2021
…ort_recv_listen() With multi-transport support, listener sockets are not bound to any transport. So, calling virtio_transport_reset(), when an error occurs, on a listener socket produces the following null-pointer dereference: BUG: kernel NULL pointer dereference, address: 00000000000000e8 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] SMP PTI CPU: 0 PID: 20 Comm: kworker/0:1 Not tainted 5.5.0-rc1-ste-00003-gb4be21f316ac-dirty raspberrypi#56 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 Workqueue: virtio_vsock virtio_transport_rx_work [vmw_vsock_virtio_transport] RIP: 0010:virtio_transport_send_pkt_info+0x20/0x130 [vmw_vsock_virtio_transport_common] Code: 1f 84 00 00 00 00 00 0f 1f 00 55 48 89 e5 41 57 41 56 41 55 49 89 f5 41 54 49 89 fc 53 48 83 ec 10 44 8b 76 20 e8 c0 ba fe ff <48> 8b 80 e8 00 00 00 e8 64 e3 7d c1 45 8b 45 00 41 8b 8c 24 d4 02 RSP: 0018:ffffc900000b7d08 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff88807bf12728 RCX: 0000000000000000 RDX: ffff88807bf12700 RSI: ffffc900000b7d50 RDI: ffff888035c84000 RBP: ffffc900000b7d40 R08: ffff888035c84000 R09: ffffc900000b7d08 R10: ffff8880781de800 R11: 0000000000000018 R12: ffff888035c84000 R13: ffffc900000b7d50 R14: 0000000000000000 R15: ffff88807bf12724 FS: 0000000000000000(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000e8 CR3: 00000000790f4004 CR4: 0000000000160ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: virtio_transport_reset+0x59/0x70 [vmw_vsock_virtio_transport_common] virtio_transport_recv_pkt+0x5bb/0xe50 [vmw_vsock_virtio_transport_common] ? detach_buf_split+0xf1/0x130 virtio_transport_rx_work+0xba/0x130 [vmw_vsock_virtio_transport] process_one_work+0x1c0/0x300 worker_thread+0x45/0x3c0 kthread+0xfc/0x130 ? current_work+0x40/0x40 ? kthread_park+0x90/0x90 ret_from_fork+0x35/0x40 Modules linked in: sunrpc kvm_intel kvm vmw_vsock_virtio_transport vmw_vsock_virtio_transport_common irqbypass vsock virtio_rng rng_core CR2: 00000000000000e8 ---[ end trace e75400e2ea2fa824 ]--- This happens because virtio_transport_reset() calls virtio_transport_send_pkt_info() that can be used only on connecting/connected sockets. This patch fixes the issue, using virtio_transport_reset_no_sock() instead of virtio_transport_reset() when we are handling a listener socket. Fixes: c0cfa2d ("vsock: add multi-transports support") Signed-off-by: Stefano Garzarella <[email protected]> Signed-off-by: David S. Miller <[email protected]> (cherry picked from commit df18fa1) Bug: 165696208 Signed-off-by: Alistair Delva <[email protected]> Change-Id: I9179912626bfe267d3a8fc7c5d1e861e3156484f (cherry picked from commit a2953fbbf2ae8019c729046da13c2a63adb01668)
xukuohai
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to xukuohai/linux-raspberry-pi
that referenced
this issue
May 9, 2022
The BPF STX/LDX instruction uses offset relative to the FP to address
stack space. Since the BPF_FP locates at the top of the frame, the offset
is usually a negative number. However, arm64 str/ldr immediate instruction
requires that offset be a positive number. Therefore, this patch tries to
convert the offsets.
The method is to find the negative offset furthest from the FP firstly.
Then add it to the FP, calculate a bottom position, called FPB, and then
adjust the offsets in other STR/LDX instructions relative to FPB.
FPB is saved using the callee-saved register x27 of arm64 which is not
used yet.
Before adjusting the offset, the patch checks every instruction to ensure
that the FP does not change in run-time. If the FP may change, no offset
is adjusted.
For example, for the following bpftrace command:
bpftrace -e 'kprobe:do_sys_open { printf("opening: %s\n", str(arg1)); }'
Without this patch, jited code(fragment):
0: bti c
4: stp x29, x30, [sp, #-16]!
8: mov x29, sp
c: stp x19, x20, [sp, #-16]!
10: stp x21, x22, [sp, #-16]!
14: stp x25, x26, [sp, #-16]!
18: mov x25, sp
1c: mov x26, #0x0 // #0
20: bti j
24: sub sp, sp, #0x90
28: add x19, x0, #0x0
2c: mov x0, #0x0 // #0
30: mov x10, #0xffffffffffffff78 // #-136
34: str x0, [x25, x10]
38: mov x10, #0xffffffffffffff80 // #-128
3c: str x0, [x25, x10]
40: mov x10, #0xffffffffffffff88 // #-120
44: str x0, [x25, x10]
48: mov x10, #0xffffffffffffff90 // #-112
4c: str x0, [x25, x10]
50: mov x10, #0xffffffffffffff98 // #-104
54: str x0, [x25, x10]
58: mov x10, #0xffffffffffffffa0 // #-96
5c: str x0, [x25, x10]
60: mov x10, #0xffffffffffffffa8 // #-88
64: str x0, [x25, x10]
68: mov x10, #0xffffffffffffffb0 // #-80
6c: str x0, [x25, x10]
70: mov x10, #0xffffffffffffffb8 // #-72
74: str x0, [x25, x10]
78: mov x10, #0xffffffffffffffc0 // #-64
7c: str x0, [x25, x10]
80: mov x10, #0xffffffffffffffc8 // #-56
84: str x0, [x25, x10]
88: mov x10, #0xffffffffffffffd0 // #-48
8c: str x0, [x25, x10]
90: mov x10, #0xffffffffffffffd8 // #-40
94: str x0, [x25, x10]
98: mov x10, #0xffffffffffffffe0 // #-32
9c: str x0, [x25, x10]
a0: mov x10, #0xffffffffffffffe8 // #-24
a4: str x0, [x25, x10]
a8: mov x10, #0xfffffffffffffff0 // #-16
ac: str x0, [x25, x10]
b0: mov x10, #0xfffffffffffffff8 // #-8
b4: str x0, [x25, x10]
b8: mov x10, #0x8 // raspberrypi#8
bc: ldr x2, [x19, x10]
[...]
With this patch, jited code(fragment):
0: bti c
4: stp x29, x30, [sp, #-16]!
8: mov x29, sp
c: stp x19, x20, [sp, #-16]!
10: stp x21, x22, [sp, #-16]!
14: stp x25, x26, [sp, #-16]!
18: stp x27, x28, [sp, #-16]!
1c: mov x25, sp
20: sub x27, x25, #0x88
24: mov x26, #0x0 // #0
28: bti j
2c: sub sp, sp, #0x90
30: add x19, x0, #0x0
34: mov x0, #0x0 // #0
38: str x0, [x27]
3c: str x0, [x27, raspberrypi#8]
40: str x0, [x27, raspberrypi#16]
44: str x0, [x27, raspberrypi#24]
48: str x0, [x27, raspberrypi#32]
4c: str x0, [x27, raspberrypi#40]
50: str x0, [x27, raspberrypi#48]
54: str x0, [x27, raspberrypi#56]
58: str x0, [x27, raspberrypi#64]
5c: str x0, [x27, raspberrypi#72]
60: str x0, [x27, raspberrypi#80]
64: str x0, [x27, raspberrypi#88]
68: str x0, [x27, raspberrypi#96]
6c: str x0, [x27, raspberrypi#104]
70: str x0, [x27, raspberrypi#112]
74: str x0, [x27, raspberrypi#120]
78: str x0, [x27, raspberrypi#128]
7c: ldr x2, [x19, raspberrypi#8]
[...]
Signed-off-by: Xu Kuohai <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
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Add bpf trampoline support for arm64. Most of the logic is the same as x86. fentry before bpf trampoline hooked: mov x9, x30 nop fentry after bpf trampoline hooked: mov x9, x30 bl <bpf_trampoline> Tested on qemu, result: raspberrypi#18 bpf_tcp_ca:OK raspberrypi#51 dummy_st_ops:OK raspberrypi#55 fentry_fexit:OK raspberrypi#56 fentry_test:OK raspberrypi#57 fexit_bpf2bpf:OK raspberrypi#58 fexit_sleep:OK raspberrypi#59 fexit_stress:OK raspberrypi#60 fexit_test:OK raspberrypi#67 get_func_args_test:OK raspberrypi#68 get_func_ip_test:OK raspberrypi#101 modify_return:OK raspberrypi#233 xdp_bpf2bpf:OK Signed-off-by: Xu Kuohai <[email protected]> Acked-by: Song Liu <[email protected]>
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Add bpf trampoline support for arm64. Most of the logic is the same as x86. fentry before bpf trampoline hooked: mov x9, x30 nop fentry after bpf trampoline hooked: mov x9, x30 bl <bpf_trampoline> Tested on qemu, result: raspberrypi#18 bpf_tcp_ca:OK raspberrypi#51 dummy_st_ops:OK raspberrypi#55 fentry_fexit:OK raspberrypi#56 fentry_test:OK raspberrypi#57 fexit_bpf2bpf:OK raspberrypi#58 fexit_sleep:OK raspberrypi#59 fexit_stress:OK raspberrypi#60 fexit_test:OK raspberrypi#67 get_func_args_test:OK raspberrypi#68 get_func_ip_test:OK raspberrypi#101 modify_return:OK raspberrypi#233 xdp_bpf2bpf:OK Signed-off-by: Xu Kuohai <[email protected]> Acked-by: Song Liu <[email protected]>
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[ Upstream commit 9ca5e7e ] When a file descriptor of pppol2tp socket is passed as file descriptor of UDP socket, a recursive deadlock occurs in l2tp_tunnel_register(). This situation is reproduced by the following program: int main(void) { int sock; struct sockaddr_pppol2tp addr; sock = socket(AF_PPPOX, SOCK_DGRAM, PX_PROTO_OL2TP); if (sock < 0) { perror("socket"); return 1; } addr.sa_family = AF_PPPOX; addr.sa_protocol = PX_PROTO_OL2TP; addr.pppol2tp.pid = 0; addr.pppol2tp.fd = sock; addr.pppol2tp.addr.sin_family = PF_INET; addr.pppol2tp.addr.sin_port = htons(0); addr.pppol2tp.addr.sin_addr.s_addr = inet_addr("192.168.0.1"); addr.pppol2tp.s_tunnel = 1; addr.pppol2tp.s_session = 0; addr.pppol2tp.d_tunnel = 0; addr.pppol2tp.d_session = 0; if (connect(sock, (const struct sockaddr *)&addr, sizeof(addr)) < 0) { perror("connect"); return 1; } return 0; } This program causes the following lockdep warning: ============================================ WARNING: possible recursive locking detected 6.2.0-rc5-00205-gc96618275234 #56 Not tainted -------------------------------------------- repro/8607 is trying to acquire lock: ffff8880213c8130 (sk_lock-AF_PPPOX){+.+.}-{0:0}, at: l2tp_tunnel_register+0x2b7/0x11c0 but task is already holding lock: ffff8880213c8130 (sk_lock-AF_PPPOX){+.+.}-{0:0}, at: pppol2tp_connect+0xa82/0x1a30 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(sk_lock-AF_PPPOX); lock(sk_lock-AF_PPPOX); *** DEADLOCK *** May be due to missing lock nesting notation 1 lock held by repro/8607: #0: ffff8880213c8130 (sk_lock-AF_PPPOX){+.+.}-{0:0}, at: pppol2tp_connect+0xa82/0x1a30 stack backtrace: CPU: 0 PID: 8607 Comm: repro Not tainted 6.2.0-rc5-00205-gc96618275234 #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x100/0x178 __lock_acquire.cold+0x119/0x3b9 ? lockdep_hardirqs_on_prepare+0x410/0x410 lock_acquire+0x1e0/0x610 ? l2tp_tunnel_register+0x2b7/0x11c0 ? lock_downgrade+0x710/0x710 ? __fget_files+0x283/0x3e0 lock_sock_nested+0x3a/0xf0 ? l2tp_tunnel_register+0x2b7/0x11c0 l2tp_tunnel_register+0x2b7/0x11c0 ? sprintf+0xc4/0x100 ? l2tp_tunnel_del_work+0x6b0/0x6b0 ? debug_object_deactivate+0x320/0x320 ? lockdep_init_map_type+0x16d/0x7a0 ? lockdep_init_map_type+0x16d/0x7a0 ? l2tp_tunnel_create+0x2bf/0x4b0 ? l2tp_tunnel_create+0x3c6/0x4b0 pppol2tp_connect+0x14e1/0x1a30 ? pppol2tp_put_sk+0xd0/0xd0 ? aa_sk_perm+0x2b7/0xa80 ? aa_af_perm+0x260/0x260 ? bpf_lsm_socket_connect+0x9/0x10 ? pppol2tp_put_sk+0xd0/0xd0 __sys_connect_file+0x14f/0x190 __sys_connect+0x133/0x160 ? __sys_connect_file+0x190/0x190 ? lockdep_hardirqs_on+0x7d/0x100 ? ktime_get_coarse_real_ts64+0x1b7/0x200 ? ktime_get_coarse_real_ts64+0x147/0x200 ? __audit_syscall_entry+0x396/0x500 __x64_sys_connect+0x72/0xb0 do_syscall_64+0x38/0xb0 entry_SYSCALL_64_after_hwframe+0x63/0xcd This patch fixes the issue by getting/creating the tunnel before locking the pppol2tp socket. Fixes: 0b2c597 ("l2tp: close all race conditions in l2tp_tunnel_register()") Cc: Cong Wang <[email protected]> Signed-off-by: Shigeru Yoshida <[email protected]> Reviewed-by: Guillaume Nault <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
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[ Upstream commit 9ca5e7e ] When a file descriptor of pppol2tp socket is passed as file descriptor of UDP socket, a recursive deadlock occurs in l2tp_tunnel_register(). This situation is reproduced by the following program: int main(void) { int sock; struct sockaddr_pppol2tp addr; sock = socket(AF_PPPOX, SOCK_DGRAM, PX_PROTO_OL2TP); if (sock < 0) { perror("socket"); return 1; } addr.sa_family = AF_PPPOX; addr.sa_protocol = PX_PROTO_OL2TP; addr.pppol2tp.pid = 0; addr.pppol2tp.fd = sock; addr.pppol2tp.addr.sin_family = PF_INET; addr.pppol2tp.addr.sin_port = htons(0); addr.pppol2tp.addr.sin_addr.s_addr = inet_addr("192.168.0.1"); addr.pppol2tp.s_tunnel = 1; addr.pppol2tp.s_session = 0; addr.pppol2tp.d_tunnel = 0; addr.pppol2tp.d_session = 0; if (connect(sock, (const struct sockaddr *)&addr, sizeof(addr)) < 0) { perror("connect"); return 1; } return 0; } This program causes the following lockdep warning: ============================================ WARNING: possible recursive locking detected 6.2.0-rc5-00205-gc96618275234 #56 Not tainted -------------------------------------------- repro/8607 is trying to acquire lock: ffff8880213c8130 (sk_lock-AF_PPPOX){+.+.}-{0:0}, at: l2tp_tunnel_register+0x2b7/0x11c0 but task is already holding lock: ffff8880213c8130 (sk_lock-AF_PPPOX){+.+.}-{0:0}, at: pppol2tp_connect+0xa82/0x1a30 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(sk_lock-AF_PPPOX); lock(sk_lock-AF_PPPOX); *** DEADLOCK *** May be due to missing lock nesting notation 1 lock held by repro/8607: #0: ffff8880213c8130 (sk_lock-AF_PPPOX){+.+.}-{0:0}, at: pppol2tp_connect+0xa82/0x1a30 stack backtrace: CPU: 0 PID: 8607 Comm: repro Not tainted 6.2.0-rc5-00205-gc96618275234 #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x100/0x178 __lock_acquire.cold+0x119/0x3b9 ? lockdep_hardirqs_on_prepare+0x410/0x410 lock_acquire+0x1e0/0x610 ? l2tp_tunnel_register+0x2b7/0x11c0 ? lock_downgrade+0x710/0x710 ? __fget_files+0x283/0x3e0 lock_sock_nested+0x3a/0xf0 ? l2tp_tunnel_register+0x2b7/0x11c0 l2tp_tunnel_register+0x2b7/0x11c0 ? sprintf+0xc4/0x100 ? l2tp_tunnel_del_work+0x6b0/0x6b0 ? debug_object_deactivate+0x320/0x320 ? lockdep_init_map_type+0x16d/0x7a0 ? lockdep_init_map_type+0x16d/0x7a0 ? l2tp_tunnel_create+0x2bf/0x4b0 ? l2tp_tunnel_create+0x3c6/0x4b0 pppol2tp_connect+0x14e1/0x1a30 ? pppol2tp_put_sk+0xd0/0xd0 ? aa_sk_perm+0x2b7/0xa80 ? aa_af_perm+0x260/0x260 ? bpf_lsm_socket_connect+0x9/0x10 ? pppol2tp_put_sk+0xd0/0xd0 __sys_connect_file+0x14f/0x190 __sys_connect+0x133/0x160 ? __sys_connect_file+0x190/0x190 ? lockdep_hardirqs_on+0x7d/0x100 ? ktime_get_coarse_real_ts64+0x1b7/0x200 ? ktime_get_coarse_real_ts64+0x147/0x200 ? __audit_syscall_entry+0x396/0x500 __x64_sys_connect+0x72/0xb0 do_syscall_64+0x38/0xb0 entry_SYSCALL_64_after_hwframe+0x63/0xcd This patch fixes the issue by getting/creating the tunnel before locking the pppol2tp socket. Fixes: 0b2c597 ("l2tp: close all race conditions in l2tp_tunnel_register()") Cc: Cong Wang <[email protected]> Signed-off-by: Shigeru Yoshida <[email protected]> Reviewed-by: Guillaume Nault <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
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…ress If we specify a valid CQ ring address but an invalid SQ ring address, we'll correctly spot this and free the allocated pages and clear them to NULL. However, we don't clear the ring page count, and hence will attempt to free the pages again. We've already cleared the address of the page array when freeing them, but we don't check for that. This causes the following crash: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Oops [#1] Modules linked in: CPU: 0 PID: 20 Comm: kworker/u2:1 Not tainted 6.6.0-rc5-dirty #56 Hardware name: ucbbar,riscvemu-bare (DT) Workqueue: events_unbound io_ring_exit_work epc : io_pages_free+0x2a/0x58 ra : io_rings_free+0x3a/0x50 epc : ffffffff808811a2 ra : ffffffff80881406 sp : ffff8f80000c3cd0 status: 0000000200000121 badaddr: 0000000000000000 cause: 000000000000000d [<ffffffff808811a2>] io_pages_free+0x2a/0x58 [<ffffffff80881406>] io_rings_free+0x3a/0x50 [<ffffffff80882176>] io_ring_exit_work+0x37e/0x424 [<ffffffff80027234>] process_one_work+0x10c/0x1f4 [<ffffffff8002756e>] worker_thread+0x252/0x31c [<ffffffff8002f5e4>] kthread+0xc4/0xe0 [<ffffffff8000332a>] ret_from_fork+0xa/0x1c Check for a NULL array in io_pages_free(), but also clear the page counts when we free them to be on the safer side. Reported-by: [email protected] Fixes: 03d89a2 ("io_uring: support for user allocated memory for rings/sqes") Cc: [email protected] Reviewed-by: Jeff Moyer <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
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…ress commit 8b51a39 upstream. If we specify a valid CQ ring address but an invalid SQ ring address, we'll correctly spot this and free the allocated pages and clear them to NULL. However, we don't clear the ring page count, and hence will attempt to free the pages again. We've already cleared the address of the page array when freeing them, but we don't check for that. This causes the following crash: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Oops [#1] Modules linked in: CPU: 0 PID: 20 Comm: kworker/u2:1 Not tainted 6.6.0-rc5-dirty #56 Hardware name: ucbbar,riscvemu-bare (DT) Workqueue: events_unbound io_ring_exit_work epc : io_pages_free+0x2a/0x58 ra : io_rings_free+0x3a/0x50 epc : ffffffff808811a2 ra : ffffffff80881406 sp : ffff8f80000c3cd0 status: 0000000200000121 badaddr: 0000000000000000 cause: 000000000000000d [<ffffffff808811a2>] io_pages_free+0x2a/0x58 [<ffffffff80881406>] io_rings_free+0x3a/0x50 [<ffffffff80882176>] io_ring_exit_work+0x37e/0x424 [<ffffffff80027234>] process_one_work+0x10c/0x1f4 [<ffffffff8002756e>] worker_thread+0x252/0x31c [<ffffffff8002f5e4>] kthread+0xc4/0xe0 [<ffffffff8000332a>] ret_from_fork+0xa/0x1c Check for a NULL array in io_pages_free(), but also clear the page counts when we free them to be on the safer side. Reported-by: [email protected] Fixes: 03d89a2 ("io_uring: support for user allocated memory for rings/sqes") Cc: [email protected] Reviewed-by: Jeff Moyer <[email protected]> Signed-off-by: Jens Axboe <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
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[ Upstream commit 26afda7 ] Christoph reported the following splat: WARNING: CPU: 1 PID: 772 at net/ipv4/af_inet.c:761 __inet_accept+0x1f4/0x4a0 Modules linked in: CPU: 1 PID: 772 Comm: syz-executor510 Not tainted 6.9.0-rc7-g7da7119fe22b #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014 RIP: 0010:__inet_accept+0x1f4/0x4a0 net/ipv4/af_inet.c:759 Code: 04 38 84 c0 0f 85 87 00 00 00 41 c7 04 24 03 00 00 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ec b7 da fd <0f> 0b e9 7f fe ff ff e8 e0 b7 da fd 0f 0b e9 fe fe ff ff 89 d9 80 RSP: 0018:ffffc90000c2fc58 EFLAGS: 00010293 RAX: ffffffff836bdd14 RBX: 0000000000000000 RCX: ffff888104668000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff836bdb89 R09: fffff52000185f64 R10: dffffc0000000000 R11: fffff52000185f64 R12: dffffc0000000000 R13: 1ffff92000185f98 R14: ffff88810754d880 R15: ffff8881007b7800 FS: 000000001c772880(0000) GS:ffff88811b280000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb9fcf2e178 CR3: 00000001045d2002 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> inet_accept+0x138/0x1d0 net/ipv4/af_inet.c:786 do_accept+0x435/0x620 net/socket.c:1929 __sys_accept4_file net/socket.c:1969 [inline] __sys_accept4+0x9b/0x110 net/socket.c:1999 __do_sys_accept net/socket.c:2016 [inline] __se_sys_accept net/socket.c:2013 [inline] __x64_sys_accept+0x7d/0x90 net/socket.c:2013 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x58/0x100 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x4315f9 Code: fd ff 48 81 c4 80 00 00 00 e9 f1 fe ff ff 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab b4 fd ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdb26d9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 0000000000400300 RCX: 00000000004315f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000006e1018 R08: 0000000000400300 R09: 0000000000400300 R10: 0000000000400300 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000040cdf0 R14: 000000000040ce80 R15: 0000000000000055 </TASK> The reproducer invokes shutdown() before entering the listener status. After commit 9406279 ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets"), the above causes the child to reach the accept syscall in FIN_WAIT1 status. Eric noted we can relax the existing assertion in __inet_accept() Reported-by: Christoph Paasch <[email protected]> Closes: multipath-tcp/mptcp_net-next#490 Suggested-by: Eric Dumazet <[email protected]> Fixes: 9406279 ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets") Reviewed-by: Eric Dumazet <[email protected]> Link: https://lore.kernel.org/r/23ab880a44d8cfd967e84de8b93dbf48848e3d8c.1716299669.git.pabeni@redhat.com Signed-off-by: Paolo Abeni <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
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Jun 12, 2024
[ Upstream commit 26afda7 ] Christoph reported the following splat: WARNING: CPU: 1 PID: 772 at net/ipv4/af_inet.c:761 __inet_accept+0x1f4/0x4a0 Modules linked in: CPU: 1 PID: 772 Comm: syz-executor510 Not tainted 6.9.0-rc7-g7da7119fe22b #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014 RIP: 0010:__inet_accept+0x1f4/0x4a0 net/ipv4/af_inet.c:759 Code: 04 38 84 c0 0f 85 87 00 00 00 41 c7 04 24 03 00 00 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ec b7 da fd <0f> 0b e9 7f fe ff ff e8 e0 b7 da fd 0f 0b e9 fe fe ff ff 89 d9 80 RSP: 0018:ffffc90000c2fc58 EFLAGS: 00010293 RAX: ffffffff836bdd14 RBX: 0000000000000000 RCX: ffff888104668000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff836bdb89 R09: fffff52000185f64 R10: dffffc0000000000 R11: fffff52000185f64 R12: dffffc0000000000 R13: 1ffff92000185f98 R14: ffff88810754d880 R15: ffff8881007b7800 FS: 000000001c772880(0000) GS:ffff88811b280000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb9fcf2e178 CR3: 00000001045d2002 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> inet_accept+0x138/0x1d0 net/ipv4/af_inet.c:786 do_accept+0x435/0x620 net/socket.c:1929 __sys_accept4_file net/socket.c:1969 [inline] __sys_accept4+0x9b/0x110 net/socket.c:1999 __do_sys_accept net/socket.c:2016 [inline] __se_sys_accept net/socket.c:2013 [inline] __x64_sys_accept+0x7d/0x90 net/socket.c:2013 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x58/0x100 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x4315f9 Code: fd ff 48 81 c4 80 00 00 00 e9 f1 fe ff ff 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab b4 fd ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdb26d9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 0000000000400300 RCX: 00000000004315f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000006e1018 R08: 0000000000400300 R09: 0000000000400300 R10: 0000000000400300 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000040cdf0 R14: 000000000040ce80 R15: 0000000000000055 </TASK> The reproducer invokes shutdown() before entering the listener status. After commit 9406279 ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets"), the above causes the child to reach the accept syscall in FIN_WAIT1 status. Eric noted we can relax the existing assertion in __inet_accept() Reported-by: Christoph Paasch <[email protected]> Closes: multipath-tcp/mptcp_net-next#490 Suggested-by: Eric Dumazet <[email protected]> Fixes: 9406279 ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets") Reviewed-by: Eric Dumazet <[email protected]> Link: https://lore.kernel.org/r/23ab880a44d8cfd967e84de8b93dbf48848e3d8c.1716299669.git.pabeni@redhat.com Signed-off-by: Paolo Abeni <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
popcornmix
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Jun 17, 2024
[ Upstream commit 26afda7 ] Christoph reported the following splat: WARNING: CPU: 1 PID: 772 at net/ipv4/af_inet.c:761 __inet_accept+0x1f4/0x4a0 Modules linked in: CPU: 1 PID: 772 Comm: syz-executor510 Not tainted 6.9.0-rc7-g7da7119fe22b #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014 RIP: 0010:__inet_accept+0x1f4/0x4a0 net/ipv4/af_inet.c:759 Code: 04 38 84 c0 0f 85 87 00 00 00 41 c7 04 24 03 00 00 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ec b7 da fd <0f> 0b e9 7f fe ff ff e8 e0 b7 da fd 0f 0b e9 fe fe ff ff 89 d9 80 RSP: 0018:ffffc90000c2fc58 EFLAGS: 00010293 RAX: ffffffff836bdd14 RBX: 0000000000000000 RCX: ffff888104668000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff836bdb89 R09: fffff52000185f64 R10: dffffc0000000000 R11: fffff52000185f64 R12: dffffc0000000000 R13: 1ffff92000185f98 R14: ffff88810754d880 R15: ffff8881007b7800 FS: 000000001c772880(0000) GS:ffff88811b280000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb9fcf2e178 CR3: 00000001045d2002 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> inet_accept+0x138/0x1d0 net/ipv4/af_inet.c:786 do_accept+0x435/0x620 net/socket.c:1929 __sys_accept4_file net/socket.c:1969 [inline] __sys_accept4+0x9b/0x110 net/socket.c:1999 __do_sys_accept net/socket.c:2016 [inline] __se_sys_accept net/socket.c:2013 [inline] __x64_sys_accept+0x7d/0x90 net/socket.c:2013 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x58/0x100 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x4315f9 Code: fd ff 48 81 c4 80 00 00 00 e9 f1 fe ff ff 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab b4 fd ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdb26d9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 0000000000400300 RCX: 00000000004315f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000006e1018 R08: 0000000000400300 R09: 0000000000400300 R10: 0000000000400300 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000040cdf0 R14: 000000000040ce80 R15: 0000000000000055 </TASK> The reproducer invokes shutdown() before entering the listener status. After commit 9406279 ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets"), the above causes the child to reach the accept syscall in FIN_WAIT1 status. Eric noted we can relax the existing assertion in __inet_accept() Reported-by: Christoph Paasch <[email protected]> Closes: multipath-tcp/mptcp_net-next#490 Suggested-by: Eric Dumazet <[email protected]> Fixes: 9406279 ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets") Reviewed-by: Eric Dumazet <[email protected]> Link: https://lore.kernel.org/r/23ab880a44d8cfd967e84de8b93dbf48848e3d8c.1716299669.git.pabeni@redhat.com Signed-off-by: Paolo Abeni <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
6by9
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Jun 19, 2024
Christoph reported the following splat: WARNING: CPU: 1 PID: 772 at net/ipv4/af_inet.c:761 __inet_accept+0x1f4/0x4a0 Modules linked in: CPU: 1 PID: 772 Comm: syz-executor510 Not tainted 6.9.0-rc7-g7da7119fe22b raspberrypi#56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014 RIP: 0010:__inet_accept+0x1f4/0x4a0 net/ipv4/af_inet.c:759 Code: 04 38 84 c0 0f 85 87 00 00 00 41 c7 04 24 03 00 00 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ec b7 da fd <0f> 0b e9 7f fe ff ff e8 e0 b7 da fd 0f 0b e9 fe fe ff ff 89 d9 80 RSP: 0018:ffffc90000c2fc58 EFLAGS: 00010293 RAX: ffffffff836bdd14 RBX: 0000000000000000 RCX: ffff888104668000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff836bdb89 R09: fffff52000185f64 R10: dffffc0000000000 R11: fffff52000185f64 R12: dffffc0000000000 R13: 1ffff92000185f98 R14: ffff88810754d880 R15: ffff8881007b7800 FS: 000000001c772880(0000) GS:ffff88811b280000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb9fcf2e178 CR3: 00000001045d2002 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> inet_accept+0x138/0x1d0 net/ipv4/af_inet.c:786 do_accept+0x435/0x620 net/socket.c:1929 __sys_accept4_file net/socket.c:1969 [inline] __sys_accept4+0x9b/0x110 net/socket.c:1999 __do_sys_accept net/socket.c:2016 [inline] __se_sys_accept net/socket.c:2013 [inline] __x64_sys_accept+0x7d/0x90 net/socket.c:2013 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x58/0x100 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x4315f9 Code: fd ff 48 81 c4 80 00 00 00 e9 f1 fe ff ff 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab b4 fd ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdb26d9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 0000000000400300 RCX: 00000000004315f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000006e1018 R08: 0000000000400300 R09: 0000000000400300 R10: 0000000000400300 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000040cdf0 R14: 000000000040ce80 R15: 0000000000000055 </TASK> The reproducer invokes shutdown() before entering the listener status. After commit 9406279 ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets"), the above causes the child to reach the accept syscall in FIN_WAIT1 status. Eric noted we can relax the existing assertion in __inet_accept() Reported-by: Christoph Paasch <[email protected]> Closes: multipath-tcp/mptcp_net-next#490 Suggested-by: Eric Dumazet <[email protected]> Fixes: 9406279 ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets") Reviewed-by: Eric Dumazet <[email protected]> Link: https://lore.kernel.org/r/23ab880a44d8cfd967e84de8b93dbf48848e3d8c.1716299669.git.pabeni@redhat.com Signed-off-by: Paolo Abeni <[email protected]>
pelwell
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Aug 2, 2024
[ Upstream commit 26afda7 ] Christoph reported the following splat: WARNING: CPU: 1 PID: 772 at net/ipv4/af_inet.c:761 __inet_accept+0x1f4/0x4a0 Modules linked in: CPU: 1 PID: 772 Comm: syz-executor510 Not tainted 6.9.0-rc7-g7da7119fe22b #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014 RIP: 0010:__inet_accept+0x1f4/0x4a0 net/ipv4/af_inet.c:759 Code: 04 38 84 c0 0f 85 87 00 00 00 41 c7 04 24 03 00 00 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ec b7 da fd <0f> 0b e9 7f fe ff ff e8 e0 b7 da fd 0f 0b e9 fe fe ff ff 89 d9 80 RSP: 0018:ffffc90000c2fc58 EFLAGS: 00010293 RAX: ffffffff836bdd14 RBX: 0000000000000000 RCX: ffff888104668000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff836bdb89 R09: fffff52000185f64 R10: dffffc0000000000 R11: fffff52000185f64 R12: dffffc0000000000 R13: 1ffff92000185f98 R14: ffff88810754d880 R15: ffff8881007b7800 FS: 000000001c772880(0000) GS:ffff88811b280000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb9fcf2e178 CR3: 00000001045d2002 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> inet_accept+0x138/0x1d0 net/ipv4/af_inet.c:786 do_accept+0x435/0x620 net/socket.c:1929 __sys_accept4_file net/socket.c:1969 [inline] __sys_accept4+0x9b/0x110 net/socket.c:1999 __do_sys_accept net/socket.c:2016 [inline] __se_sys_accept net/socket.c:2013 [inline] __x64_sys_accept+0x7d/0x90 net/socket.c:2013 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x58/0x100 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x4315f9 Code: fd ff 48 81 c4 80 00 00 00 e9 f1 fe ff ff 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab b4 fd ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdb26d9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 0000000000400300 RCX: 00000000004315f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000006e1018 R08: 0000000000400300 R09: 0000000000400300 R10: 0000000000400300 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000040cdf0 R14: 000000000040ce80 R15: 0000000000000055 </TASK> The reproducer invokes shutdown() before entering the listener status. After commit 9406279 ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets"), the above causes the child to reach the accept syscall in FIN_WAIT1 status. Eric noted we can relax the existing assertion in __inet_accept() Reported-by: Christoph Paasch <[email protected]> Closes: multipath-tcp/mptcp_net-next#490 Suggested-by: Eric Dumazet <[email protected]> Fixes: 9406279 ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets") Reviewed-by: Eric Dumazet <[email protected]> Link: https://lore.kernel.org/r/23ab880a44d8cfd967e84de8b93dbf48848e3d8c.1716299669.git.pabeni@redhat.com Signed-off-by: Paolo Abeni <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
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Oct 21, 2024
BUG: KASAN: slab-use-after-free in gsm_cleanup_mux+0x77b/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] Read of size 8 at addr ffff88815fe99c00 by task poc/3379 CPU: 0 UID: 0 PID: 3379 Comm: poc Not tainted 6.11.0+ #56 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020 Call Trace: <TASK> gsm_cleanup_mux+0x77b/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] __pfx_gsm_cleanup_mux+0x10/0x10 drivers/tty/n_gsm.c:3124 [n_gsm] __pfx_sched_clock_cpu+0x10/0x10 kernel/sched/clock.c:389 update_load_avg+0x1c1/0x27b0 kernel/sched/fair.c:4500 __pfx_min_vruntime_cb_rotate+0x10/0x10 kernel/sched/fair.c:846 __rb_insert_augmented+0x492/0xbf0 lib/rbtree.c:161 gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm] _raw_spin_lock_irqsave+0x92/0xf0 arch/x86/include/asm/atomic.h:107 __pfx_gsmld_ioctl+0x10/0x10 drivers/tty/n_gsm.c:3822 [n_gsm] ktime_get+0x5e/0x140 kernel/time/timekeeping.c:195 ldsem_down_read+0x94/0x4e0 arch/x86/include/asm/atomic64_64.h:79 __pfx_ldsem_down_read+0x10/0x10 drivers/tty/tty_ldsem.c:338 __pfx_do_vfs_ioctl+0x10/0x10 fs/ioctl.c:805 tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818 Allocated by task 65: gsm_data_alloc.constprop.0+0x27/0x190 drivers/tty/n_gsm.c:926 [n_gsm] gsm_send+0x2c/0x580 drivers/tty/n_gsm.c:819 [n_gsm] gsm1_receive+0x547/0xad0 drivers/tty/n_gsm.c:3038 [n_gsm] gsmld_receive_buf+0x176/0x280 drivers/tty/n_gsm.c:3609 [n_gsm] tty_ldisc_receive_buf+0x101/0x1e0 drivers/tty/tty_buffer.c:391 tty_port_default_receive_buf+0x61/0xa0 drivers/tty/tty_port.c:39 flush_to_ldisc+0x1b0/0x750 drivers/tty/tty_buffer.c:445 process_scheduled_works+0x2b0/0x10d0 kernel/workqueue.c:3229 worker_thread+0x3dc/0x950 kernel/workqueue.c:3391 kthread+0x2a3/0x370 kernel/kthread.c:389 ret_from_fork+0x2d/0x70 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:257 Freed by task 3367: kfree+0x126/0x420 mm/slub.c:4580 gsm_cleanup_mux+0x36c/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm] tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818 [Analysis] gsm_msg on the tx_ctrl_list or tx_data_list of gsm_mux can be freed by multi threads through ioctl,which leads to the occurrence of uaf. Protect it by gsm tx lock. Signed-off-by: Longlong Xia <[email protected]> Cc: stable <[email protected]> Suggested-by: Jiri Slaby <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Oct 23, 2024
commit 9462f4c upstream. BUG: KASAN: slab-use-after-free in gsm_cleanup_mux+0x77b/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] Read of size 8 at addr ffff88815fe99c00 by task poc/3379 CPU: 0 UID: 0 PID: 3379 Comm: poc Not tainted 6.11.0+ #56 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020 Call Trace: <TASK> gsm_cleanup_mux+0x77b/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] __pfx_gsm_cleanup_mux+0x10/0x10 drivers/tty/n_gsm.c:3124 [n_gsm] __pfx_sched_clock_cpu+0x10/0x10 kernel/sched/clock.c:389 update_load_avg+0x1c1/0x27b0 kernel/sched/fair.c:4500 __pfx_min_vruntime_cb_rotate+0x10/0x10 kernel/sched/fair.c:846 __rb_insert_augmented+0x492/0xbf0 lib/rbtree.c:161 gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm] _raw_spin_lock_irqsave+0x92/0xf0 arch/x86/include/asm/atomic.h:107 __pfx_gsmld_ioctl+0x10/0x10 drivers/tty/n_gsm.c:3822 [n_gsm] ktime_get+0x5e/0x140 kernel/time/timekeeping.c:195 ldsem_down_read+0x94/0x4e0 arch/x86/include/asm/atomic64_64.h:79 __pfx_ldsem_down_read+0x10/0x10 drivers/tty/tty_ldsem.c:338 __pfx_do_vfs_ioctl+0x10/0x10 fs/ioctl.c:805 tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818 Allocated by task 65: gsm_data_alloc.constprop.0+0x27/0x190 drivers/tty/n_gsm.c:926 [n_gsm] gsm_send+0x2c/0x580 drivers/tty/n_gsm.c:819 [n_gsm] gsm1_receive+0x547/0xad0 drivers/tty/n_gsm.c:3038 [n_gsm] gsmld_receive_buf+0x176/0x280 drivers/tty/n_gsm.c:3609 [n_gsm] tty_ldisc_receive_buf+0x101/0x1e0 drivers/tty/tty_buffer.c:391 tty_port_default_receive_buf+0x61/0xa0 drivers/tty/tty_port.c:39 flush_to_ldisc+0x1b0/0x750 drivers/tty/tty_buffer.c:445 process_scheduled_works+0x2b0/0x10d0 kernel/workqueue.c:3229 worker_thread+0x3dc/0x950 kernel/workqueue.c:3391 kthread+0x2a3/0x370 kernel/kthread.c:389 ret_from_fork+0x2d/0x70 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:257 Freed by task 3367: kfree+0x126/0x420 mm/slub.c:4580 gsm_cleanup_mux+0x36c/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm] tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818 [Analysis] gsm_msg on the tx_ctrl_list or tx_data_list of gsm_mux can be freed by multi threads through ioctl,which leads to the occurrence of uaf. Protect it by gsm tx lock. Signed-off-by: Longlong Xia <[email protected]> Cc: stable <[email protected]> Suggested-by: Jiri Slaby <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Oct 23, 2024
commit 9462f4c upstream. BUG: KASAN: slab-use-after-free in gsm_cleanup_mux+0x77b/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] Read of size 8 at addr ffff88815fe99c00 by task poc/3379 CPU: 0 UID: 0 PID: 3379 Comm: poc Not tainted 6.11.0+ #56 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020 Call Trace: <TASK> gsm_cleanup_mux+0x77b/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] __pfx_gsm_cleanup_mux+0x10/0x10 drivers/tty/n_gsm.c:3124 [n_gsm] __pfx_sched_clock_cpu+0x10/0x10 kernel/sched/clock.c:389 update_load_avg+0x1c1/0x27b0 kernel/sched/fair.c:4500 __pfx_min_vruntime_cb_rotate+0x10/0x10 kernel/sched/fair.c:846 __rb_insert_augmented+0x492/0xbf0 lib/rbtree.c:161 gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm] _raw_spin_lock_irqsave+0x92/0xf0 arch/x86/include/asm/atomic.h:107 __pfx_gsmld_ioctl+0x10/0x10 drivers/tty/n_gsm.c:3822 [n_gsm] ktime_get+0x5e/0x140 kernel/time/timekeeping.c:195 ldsem_down_read+0x94/0x4e0 arch/x86/include/asm/atomic64_64.h:79 __pfx_ldsem_down_read+0x10/0x10 drivers/tty/tty_ldsem.c:338 __pfx_do_vfs_ioctl+0x10/0x10 fs/ioctl.c:805 tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818 Allocated by task 65: gsm_data_alloc.constprop.0+0x27/0x190 drivers/tty/n_gsm.c:926 [n_gsm] gsm_send+0x2c/0x580 drivers/tty/n_gsm.c:819 [n_gsm] gsm1_receive+0x547/0xad0 drivers/tty/n_gsm.c:3038 [n_gsm] gsmld_receive_buf+0x176/0x280 drivers/tty/n_gsm.c:3609 [n_gsm] tty_ldisc_receive_buf+0x101/0x1e0 drivers/tty/tty_buffer.c:391 tty_port_default_receive_buf+0x61/0xa0 drivers/tty/tty_port.c:39 flush_to_ldisc+0x1b0/0x750 drivers/tty/tty_buffer.c:445 process_scheduled_works+0x2b0/0x10d0 kernel/workqueue.c:3229 worker_thread+0x3dc/0x950 kernel/workqueue.c:3391 kthread+0x2a3/0x370 kernel/kthread.c:389 ret_from_fork+0x2d/0x70 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:257 Freed by task 3367: kfree+0x126/0x420 mm/slub.c:4580 gsm_cleanup_mux+0x36c/0x7b0 drivers/tty/n_gsm.c:3160 [n_gsm] gsmld_ioctl+0x395/0x1450 drivers/tty/n_gsm.c:3408 [n_gsm] tty_ioctl+0x643/0x1100 drivers/tty/tty_io.c:2818 [Analysis] gsm_msg on the tx_ctrl_list or tx_data_list of gsm_mux can be freed by multi threads through ioctl,which leads to the occurrence of uaf. Protect it by gsm tx lock. Signed-off-by: Longlong Xia <[email protected]> Cc: stable <[email protected]> Suggested-by: Jiri Slaby <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Hi:
Using rtorrent or tranmission gives me a kernel panic, Can't find the kernel dump.
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