fix debian packaging #2
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Maven85
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Bento4 update
Maven85
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Bento4 update
Maven85
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Bento4 update
Maven85
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Bento4 update
dobo90
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Feb 7, 2023
Sometimes I'm encountering a crash when starting a live dash stream with a following backtrace: #0 0x910819d4 in adaptive::AdaptiveStream::start_stream() (this=<optimized out>) at /usr/src/debug/kodi-addon-inputstream-adaptive/inputstream.adaptive-20.3.2-Nexus/src/common/AdaptiveStream.cpp:606 xbmc#1 0x91069d0c in CInputStreamAdaptive::OpenStream(int) (this=0xaf51fa68, streamid=1006) at /usr/src/debug/kodi-addon-inputstream-adaptive/inputstream.adaptive-20.3.2-Nexus/src/main.cpp:309 xbmc#2 0x00e2f5d4 in CDVDDemuxClient::OpenStream(int) () xbmc#3 0x00e97ad4 in CVideoPlayer::OpenStream(CCurrentStream&, long long, int, int, bool) () xbmc#4 0x00e9e3c8 in CVideoPlayer::OpenDefaultStreams(bool) () xbmc#5 0x00ea3b18 in CVideoPlayer::Prepare() () xbmc#6 0x00ea5dc0 in CVideoPlayer::Process() () xbmc#7 0x011dcc6c in CThread::Action() () AdaptiveStream.cpp:606 points to a following line: ``` currentPTSOffset_ = (next_segment->startPTS_ * current_rep_->timescale_ext_) / current_rep_->timescale_int_; ``` After taking a look on the assembly listing: (gdb) disas /m _ZN8adaptive14AdaptiveStream12start_streamEv ... 0x910819c8 <+1592>: ldrne r3, [sp, xbmc#28] 0x910819d0 <+1600>: ldr r4, [r3, xbmc#324] ; 0x144 => 0x910819d4 <+1604>: ldr r0, [r8, xbmc#40] ; 0x28 0x910819d8 <+1608>: ldr r12, [r8, xbmc#44] ; 0x2c 0x910819dc <+1612>: mov r8, #0 0x910819e4 <+1620>: mov r3, r8 0x910819e8 <+1624>: umull r0, r1, r0, r4 0x910819ec <+1628>: mov r2, r9 0x910819f0 <+1632>: mla r1, r4, r12, r1 0x910819f4 <+1636>: bl 0x9105a6b4 <__aeabi_uldivmod@plt> ... it appears that $r3 contains a valid representation: (gdb) p *((AdaptiveTree::Representation*) $r3) $1 = {url_ = "http://lb2-e2-18.pluscdn.pl/ch/1456330/123/dash/294f032c/1080p/p_3f26ad64-5258-452e-9bdc-209c361003e9_1667995241000/init.mp4", id = "1080p", codecs_ = "avc1.640028", codec_private_data_ = "", source_url_ = "", base_url_ = "http://lb2-e2-18.pluscdn.pl/ch/1456330/123/dash/294f032c/", bandwidth_ = 5000000, samplingRate_ = 0, width_ = 1920, height_ = 1080, fpsRate_ = 25, fpsScale_ = 1, aspect_ = 0, assured_buffer_duration_ = 20, max_buffer_duration_ = 40, static BYTERANGE = 0, static INDEXRANGEEXACT = 1, static TEMPLATE = 2, static TIMELINE = 4, static INITIALIZATION = 8, static SEGMENTBASE = 16, static SUBTITLESTREAM = 32, static INCLUDEDSTREAM = 64, static URLSEGMENTS = 128, static ENABLED = 256, static WAITFORSEGMENT = 512, static INITIALIZATION_PREFIXED = 1024, static DOWNLOADED = 2048, static INITIALIZED = 4096, flags_ = 14, hdcpVersion_ = 0, indexRangeMin_ = 0, indexRangeMax_ = 0, channelCount_ = 0 '\000', nalLengthSize_ = 0 '\000', pssh_set_ = 2, expired_segments_ = 0, containerType_ = adaptive::AdaptiveTree::CONTAINERTYPE_MP4, segtpl_ = { initialization = "http://lb2-e2-18.pluscdn.pl/ch/1456330/123/dash/294f032c/1080p/p_3f26ad64-5258-452e-9bdc-209c361003e9_1667995241000/init.mp4", media = "http://lb2-e2-18.pluscdn.pl/ch/1456330/123/dash/294f032c/$RepresentationID$/p_3f26ad64-5258-452e-9bdc-209c361003e9_1667995241000/t$Time$.mp4", media_url = "http://lb2-e2-18.pluscdn.pl/ch/1456330/123/dash/294f032c/1080p/p_3f26ad64-5258-452e-9bdc-209c361003e9_1667995241000/t$Time$.mp4", timescale = 90000, duration = 230395}, startNumber_ = 4, nextPts_ = 20170141682400, ptsOffset_ = 0, duration_ = 972288000, timescale_ = 90000, timescale_ext_ = 100, timescale_int_ = 9, initialization_ = {range_begin_ = 0, range_end_ = 18446744073709551615, url = "", startPTS_ = 0, m_duration = 0, pssh_set_ = 0}, segments_ = {basePos = 0, data = std::vector of length 4220, capacity 4220 = {{ range_begin_ = 20169170085600, range_end_ = 1, url = "", startPTS_ = 20169170085600, m_duration = 0, pssh_set_ = 0}, {range_begin_ = 20169170316000, range_end_ = 2, url = "", startPTS_ = 20169170316000, m_duration = 0, pssh_set_ = 0}, {range_begin_ = 20169170546400, range_end_ = 3, url = "", startPTS_ = 20169170546400, m_duration = 0, pssh_set_ = 0}, { range_begin_ = 20169170776800, range_end_ = 4, url = "", startPTS_ = 20169170776800, m_duration = 0, pssh_set_ = 0}, {range_begin_ = 20169171007200, range_end_ = 5, url = "", startPTS_ = 20169171007200, m_duration = 0, pssh_set_ = 0}, {range_begin_ = 20169171237600, range_end_ = 6, url = "", startPTS_ = 20169171237600, m_duration = 0, pssh_set_ = 0}, { range_begin_ = 20169171468000, range_end_ = 7, url = "", startPTS_ = 20169171468000, m_duration = 0, pssh_set_ = 0}, {range_begin_ = 20169171698400, range_end_ = 8, url = "", ... $r8 should point to a valid next segment but doesn't: (gdb) p *((adaptive::AdaptiveTree::Segment*) $r8) Cannot access memory at address 0xa1a7dd88 After manually calculating next segment position in gdb it should point to: (gdb) p ((AdaptiveTree::Representation*) $r3)->current_segment_ - &((AdaptiveTree::Representation*) $r3)->segments_.data[0] + 1 $2 = 4211 (gdb) p &((AdaptiveTree::Representation*) $r3)->segments_.data[4211] $3 = (adaptive::AdaptiveTree::Segment *) 0x97ae9f10 (gdb) p ((AdaptiveTree::Representation*) $r3)->segments_.data[4211] $4 = {range_begin_ = 20170140300000, range_end_ = 4212, url = "", startPTS_ = 20170140300000, m_duration = 0, pssh_set_ = 0} My conclusion is that we are properly calculating next segment position but for some reason the memory got deallocated. My assumption is that updater thread has managed to parse the dash xml and update the segments.
dobo90
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Feb 8, 2023
* Add sleep inside AdaptiveTree.cpp to trigger the issue
From Kodi logs:
2023-02-08 18:02:11.679 T:22020 info <general>: Creating InputStream
2023-02-08 18:02:11.691 T:22020 info <general>: AddOnLog: inputstream.adaptive: [Repr. chooser] Resolution set: 4096x2304, max allowed: 8152x4436, Adjust refresh rate: 0
2023-02-08 18:02:11.989 T:22020 info <general>: AddOnLog: inputstream.adaptive: Successfully parsed manifest file (Periods: 1, Streams in first period: 2, Type: live)
2023-02-08 18:02:12.989 T:22024 error <general>: AddOnLog: inputstream.adaptive: SegmentUpdateWorker: DEBUG before RefreshLiveSegments()
2023-02-08 18:02:13.028 T:22020 info <general>: Creating Demuxer
2023-02-08 18:02:13.029 T:22020 info <general>: Opening stream: 1006 source: 256
2023-02-08 18:02:13.114 T:22024 error <general>: AddOnLog: inputstream.adaptive: SegmentUpdateWorker: DEBUG after RefreshLiveSegments()
2023-02-08 18:02:13.160 T:22020 error <general>: AddOnLog: inputstream.adaptive: DEBUG before sleep()
2023-02-08 18:02:14.114 T:22024 error <general>: AddOnLog: inputstream.adaptive: SegmentUpdateWorker: DEBUG before RefreshLiveSegments()
2023-02-08 18:02:14.135 T:22024 error <general>: AddOnLog: inputstream.adaptive: SegmentUpdateWorker: DEBUG after RefreshLiveSegments()
2023-02-08 18:02:15.135 T:22024 error <general>: AddOnLog: inputstream.adaptive: SegmentUpdateWorker: DEBUG before RefreshLiveSegments()
2023-02-08 18:02:15.155 T:22024 error <general>: AddOnLog: inputstream.adaptive: SegmentUpdateWorker: DEBUG after RefreshLiveSegments()
2023-02-08 18:02:16.155 T:22024 error <general>: AddOnLog: inputstream.adaptive: SegmentUpdateWorker: DEBUG before RefreshLiveSegments()
2023-02-08 18:02:16.161 T:22020 error <general>: AddOnLog: inputstream.adaptive: DEBUG after sleep()
Address sanitizer report:
==21945==ERROR: AddressSanitizer: heap-use-after-free on address 0x7f402596e960 at pc 0x7f40131c4944 bp 0x7f402616de50 sp 0x7f402616de40
READ of size 8 at 0x7f402596e960 thread T53
#0 0x7f40131c4943 in adaptive::AdaptiveStream::start_stream() /home/dobo/kodi/inputstream.adaptive/src/common/AdaptiveStream.cpp:610
xbmc#1 0x7f4013178317 in CInputStreamAdaptive::OpenStream(int) /home/dobo/kodi/inputstream.adaptive/src/main.cpp:309
xbmc#2 0x7f4013187f07 in kodi::addon::CInstanceInputStream::ADDON_OpenStream(AddonInstance_InputStream const*, int) (/usr/lib/kodi/addons/inputstream.adaptive/inputstream.adaptive.so.20.3.2+0x387f07)
xbmc#3 0x55abad48474b in CDVDDemuxClient::OpenStream(int) (/usr/lib/kodi/kodi.bin+0xb7c74b)
xbmc#4 0x55abad508385 in CVideoPlayer::OpenStream(CCurrentStream&, long, int, int, bool) (/usr/lib/kodi/kodi.bin+0xc00385)
xbmc#5 0x55abad508bba in CVideoPlayer::OpenDefaultStreams(bool) (/usr/lib/kodi/kodi.bin+0xc00bba)
xbmc#6 0x55abad50a857 in CVideoPlayer::Prepare() (/usr/lib/kodi/kodi.bin+0xc02857)
xbmc#7 0x55abad510d45 in CVideoPlayer::Process() (/usr/lib/kodi/kodi.bin+0xc08d45)
xbmc#8 0x55abad758396 in CThread::Action() (/usr/lib/kodi/kodi.bin+0xe50396)
xbmc#9 0x55abae0f0e24 (/usr/lib/kodi/kodi.bin+0x17e8e24)
xbmc#10 0x55abad755dba (/usr/lib/kodi/kodi.bin+0xe4ddba)
xbmc#11 0x7f403d4d72c2 in execute_native_thread_routine /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:82
xbmc#12 0x7f403dd8cbb4 (/usr/lib/libc.so.6+0x85bb4)
xbmc#13 0x7f403de0ed8f (/usr/lib/libc.so.6+0x107d8f)
0x7f402596e960 is located 303456 bytes inside of 303840-byte region [0x7f4025924800,0x7f402596eae0)
freed by thread T57 here:
#0 0x7f403fac178a in operator delete(void*, unsigned long) /usr/src/debug/gcc/gcc/libsanitizer/asan/asan_new_delete.cpp:164
xbmc#1 0x7f40131de17d in std::__new_allocator<adaptive::AdaptiveTree::Segment>::deallocate(adaptive::AdaptiveTree::Segment*, unsigned long) /usr/include/c++/12.2.1/bits/new_allocator.h:158
xbmc#2 0x7f40131d974a in std::allocator_traits<std::allocator<adaptive::AdaptiveTree::Segment> >::deallocate(std::allocator<adaptive::AdaptiveTree::Segment>&, adaptive::AdaptiveTree::Segment*, unsigned long) /usr/include/c++/12.2.1/bits/alloc_traits.h:496
xbmc#3 0x7f40131d33cb in std::_Vector_base<adaptive::AdaptiveTree::Segment, std::allocator<adaptive::AdaptiveTree::Segment> >::_M_deallocate(adaptive::AdaptiveTree::Segment*, unsigned long) /usr/include/c++/12.2.1/bits/stl_vector.h:387
xbmc#4 0x7f40131edabd in std::_Vector_base<adaptive::AdaptiveTree::Segment, std::allocator<adaptive::AdaptiveTree::Segment> >::~_Vector_base() /usr/include/c++/12.2.1/bits/stl_vector.h:366
xbmc#5 0x7f40131edb57 in std::vector<adaptive::AdaptiveTree::Segment, std::allocator<adaptive::AdaptiveTree::Segment> >::~vector() /usr/include/c++/12.2.1/bits/stl_vector.h:733
xbmc#6 0x7f40131ea67f in adaptive::SPINCACHE<adaptive::AdaptiveTree::Segment>::~SPINCACHE() /home/dobo/kodi/inputstream.adaptive/src/common/AdaptiveTree.h:44
xbmc#7 0x7f40131eae13 in adaptive::AdaptiveTree::Representation::~Representation() /home/dobo/kodi/inputstream.adaptive/src/common/AdaptiveTree.h:208
xbmc#8 0x7f40131eb5c2 in adaptive::AdaptiveTree::AdaptationSet::~AdaptationSet() /home/dobo/kodi/inputstream.adaptive/src/parser/../common/AdaptiveTree.h:326
xbmc#9 0x7f40131ecef6 in adaptive::AdaptiveTree::Period::~Period() /home/dobo/kodi/inputstream.adaptive/src/parser/../common/AdaptiveTree.h:462
xbmc#10 0x7f40131e19ef in adaptive::AdaptiveTree::~AdaptiveTree() /home/dobo/kodi/inputstream.adaptive/src/common/AdaptiveTree.cpp:92
xbmc#11 0x7f401323f6a4 in adaptive::DASHTree::~DASHTree() /home/dobo/kodi/inputstream.adaptive/src/parser/DASHTree.h:16
xbmc#12 0x7f401323f6bf in adaptive::DASHTree::~DASHTree() /home/dobo/kodi/inputstream.adaptive/src/parser/DASHTree.h:16
xbmc#13 0x7f401323f73c in std::default_delete<adaptive::DASHTree>::operator()(adaptive::DASHTree*) const /usr/include/c++/12.2.1/bits/unique_ptr.h:95
xbmc#14 0x7f401323c926 in std::unique_ptr<adaptive::DASHTree, std::default_delete<adaptive::DASHTree> >::~unique_ptr() /usr/include/c++/12.2.1/bits/unique_ptr.h:396
xbmc#15 0x7f4013237aa8 in adaptive::DASHTree::RefreshLiveSegments() /home/dobo/kodi/inputstream.adaptive/src/parser/DASHTree.cpp:1962
xbmc#16 0x7f40131e7842 in adaptive::AdaptiveTree::SegmentUpdateWorker() /home/dobo/kodi/inputstream.adaptive/src/common/AdaptiveTree.cpp:431
xbmc#17 0x7f4013208eea in void std::__invoke_impl<void, void (adaptive::AdaptiveTree::*)(), adaptive::AdaptiveTree*>(std::__invoke_memfun_deref, void (adaptive::AdaptiveTree::*&&)(), adaptive::AdaptiveTree*&&) /usr/include/c++/12.2.1/bits/invoke.h:74
xbmc#18 0x7f4013208d56 in std::__invoke_result<void (adaptive::AdaptiveTree::*)(), adaptive::AdaptiveTree*>::type std::__invoke<void (adaptive::AdaptiveTree::*)(), adaptive::AdaptiveTree*>(void (adaptive::AdaptiveTree::*&&)(), adaptive::AdaptiveTree*&&) /usr/include/c++/12.2.1/bits/invoke.h:96
xbmc#19 0x7f4013208cc6 in void std::thread::_Invoker<std::tuple<void (adaptive::AdaptiveTree::*)(), adaptive::AdaptiveTree*> >::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) /usr/include/c++/12.2.1/bits/std_thread.h:258
xbmc#20 0x7f4013208c7f in std::thread::_Invoker<std::tuple<void (adaptive::AdaptiveTree::*)(), adaptive::AdaptiveTree*> >::operator()() /usr/include/c++/12.2.1/bits/std_thread.h:265
xbmc#21 0x7f4013208c63 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (adaptive::AdaptiveTree::*)(), adaptive::AdaptiveTree*> > >::_M_run() /usr/include/c++/12.2.1/bits/std_thread.h:210
xbmc#22 0x7f403d4d72c2 in execute_native_thread_routine /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:82
previously allocated by thread T53 here:
#0 0x7f403fac0672 in operator new(unsigned long) /usr/src/debug/gcc/gcc/libsanitizer/asan/asan_new_delete.cpp:95
xbmc#1 0x7f40131deab1 in std::__new_allocator<adaptive::AdaptiveTree::Segment>::allocate(unsigned long, void const*) /usr/include/c++/12.2.1/bits/new_allocator.h:137
xbmc#2 0x7f40131db727 in std::allocator_traits<std::allocator<adaptive::AdaptiveTree::Segment> >::allocate(std::allocator<adaptive::AdaptiveTree::Segment>&, unsigned long) /usr/include/c++/12.2.1/bits/alloc_traits.h:464
xbmc#3 0x7f40131d5b81 in std::_Vector_base<adaptive::AdaptiveTree::Segment, std::allocator<adaptive::AdaptiveTree::Segment> >::_M_allocate(unsigned long) /usr/include/c++/12.2.1/bits/stl_vector.h:378
xbmc#4 0x7f40131d1308 in std::vector<adaptive::AdaptiveTree::Segment, std::allocator<adaptive::AdaptiveTree::Segment> >::reserve(unsigned long) /usr/include/c++/12.2.1/bits/vector.tcc:79
xbmc#5 0x7f401322dd61 in end /home/dobo/kodi/inputstream.adaptive/src/parser/DASHTree.cpp:1253
xbmc#6 0x7f403c4d8263 (/usr/lib/libexpat.so.1+0xd263)
Thread T53 created by T0 here:
#0 0x7f403fa64207 in __interceptor_pthread_create /usr/src/debug/gcc/gcc/libsanitizer/asan/asan_interceptors.cpp:207
xbmc#1 0x7f403d4d73a9 in __gthread_create /usr/src/debug/gcc/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:663
xbmc#2 0x7f403d4d73a9 in std::thread::_M_start_thread(std::unique_ptr<std::thread::_State, std::default_delete<std::thread::_State> >, void (*)()) /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:147
Thread T57 created by T53 here:
#0 0x7f403fa64207 in __interceptor_pthread_create /usr/src/debug/gcc/gcc/libsanitizer/asan/asan_interceptors.cpp:207
xbmc#1 0x7f403d4d73a9 in __gthread_create /usr/src/debug/gcc/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:663
xbmc#2 0x7f403d4d73a9 in std::thread::_M_start_thread(std::unique_ptr<std::thread::_State, std::default_delete<std::thread::_State> >, void (*)()) /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:147
xbmc#3 0x7f40131e751e in adaptive::AdaptiveTree::StartUpdateThread() /home/dobo/kodi/inputstream.adaptive/src/common/AdaptiveTree.cpp:418
xbmc#4 0x7f401323398d in adaptive::DASHTree::open(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >) /home/dobo/kodi/inputstream.adaptive/src/parser/DASHTree.cpp:1639
xbmc#5 0x7f401328c8ed in SESSION::CSession::Initialize() /home/dobo/kodi/inputstream.adaptive/src/Session.cpp:248
xbmc#6 0x7f4013175f30 in CInputStreamAdaptive::Open(kodi::addon::InputstreamProperty const&) /home/dobo/kodi/inputstream.adaptive/src/main.cpp:86
xbmc#7 0x7f40131871d5 in kodi::addon::CInstanceInputStream::ADDON_Open(AddonInstance_InputStream const*, INPUTSTREAM_PROPERTY*) (/usr/lib/kodi/addons/inputstream.adaptive/inputstream.adaptive.so.20.3.2+0x3871d5)
xbmc#8 0x55abad46eddc in CInputStreamAddon::Open() (/usr/lib/kodi/kodi.bin+0xb66ddc)
SUMMARY: AddressSanitizer: heap-use-after-free /home/dobo/kodi/inputstream.adaptive/src/common/AdaptiveStream.cpp:610 in adaptive::AdaptiveStream::start_stream()
Shadow bytes around the buggy address:
0x0fe884b25cd0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0fe884b25ce0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0fe884b25cf0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0fe884b25d00: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0fe884b25d10: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
=>0x0fe884b25d20: fd fd fd fd fd fd fd fd fd fd fd fd[fd]fd fd fd
0x0fe884b25d30: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0fe884b25d40: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0fe884b25d50: fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa fa
0x0fe884b25d60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0fe884b25d70: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==21945==ABORTING
dobo90
pushed a commit
to dobo90/inputstream.adaptive
that referenced
this pull request
Feb 14, 2023
…hile CloseSession is active to avoid endless loop.
Sometimes when stopping a playback Kodi crashes with a following backtrace:
(__m=<optimized out>, this=<optimized out>)
at /usr/include/c++/12.1.0/bits/atomic_base.h:486
__b = <optimized out>
at /usr/include/c++/12.1.0/atomic:87
(adp=std::shared_ptr<media::CdmAdapter> (use count 1, weak count 1) = {...}, delay=<optimized out>, context=<optimized out>)
at /usr/src/debug/kodi-addon-inputstream-adaptive/inputstream.adaptive-20.3.3-Nexus/wvdecrypter/cdm/media/cdm/cdm_adapter.cc:81
at /usr/include/c++/12.1.0/bits/invoke.h:96, unsigned long long, void*), std::shared_ptr<media::CdmAdapter>, long long, void*> >::_M_invoke<0u, 1u, 2u, 3u>(std::_Index_tuple<0u, 1u, 2u, 3u>)
(this=<optimized out>) at /usr/include/c++/12.1.0/bits/std_thread.h:252
at /usr/include/c++/12.1.0/bits/std_thread.h:259
at /usr/include/c++/12.1.0/bits/std_thread.h:210
at /usr/src/debug/gcc/libstdc++-v3/src/c++11/thread.cc:82
ret = <optimized out>
pd = 0x85cf9080
unwind_buf = {cancel_jmp_buf = {{jmp_buf = {857629366, 66004830, -2049994624, -2008033272, -2008033282, 338, -2008033281, 8387456, -2058383360, -2049995908, 1920, 1080, 3840, 2160, 0, 10000000, -1431355392, 1107558643, 0 <repeats 46 times>}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
not_first_call = <optimized out>
robust = <optimized out>
After searching in the github history it came out that there was a
similar issue adressed in xbmc#728.
For some reason that piece of code got removed in
xbmc@8889fe9
(in pull request xbmc#883).
The stack trace is from the Raspberry Pi 4 machine. But I can also reproduce the issue
on my x86_64 Linux machine by adding a 1s sleep in the beginning of CdmAdapter::SetTimer.
In order to reproduce it is necessary to quickly play/stop streams.
Script attached at the end of the commit message can be used to ease the reproduction.
In my environment running the script for 1-3 minutes makes Kodi crash.
Although the root cause described in xbmc#729
was a busy loop. Right now address sanitizer reports:
```
AddressSanitizer:DEADLYSIGNAL
=================================================================
==108079==ERROR: AddressSanitizer: SEGV on unknown address 0x7f6e314f7d4a (pc 0x7f6e314f7d4a bp 0x7f6e263fd830 sp 0x7f6e263fd720 T464)
==108079==The signal is caused by a READ memory access.
==108079==Hint: PC is at a non-executable region. Maybe a wild jump?
#0 0x7f6e314f7d4a (<unknown module>)
xbmc#1 0x7f6e3151c066 (<unknown module>)
xbmc#2 0x7f6e31526947 (<unknown module>)
xbmc#3 0x7f6e31526729 (<unknown module>)
xbmc#4 0x7f6e31526620 (<unknown module>)
xbmc#5 0x7f6e315265a1 (<unknown module>)
xbmc#6 0x7f6e31526585 (<unknown module>)
xbmc#7 0x7f6e46ed72c2 in execute_native_thread_routine /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:82
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (<unknown module>)
Thread T464 created by T51 here:
#0 0x7f6e49464207 in __interceptor_pthread_create /usr/src/debug/gcc/gcc/libsanitizer/asan/asan_interceptors.cpp:207
xbmc#1 0x7f6e46ed73a9 in __gthread_create /usr/src/debug/gcc/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:663
xbmc#2 0x7f6e46ed73a9 in std::thread::_M_start_thread(std::unique_ptr<std::thread::_State, std::default_delete<std::thread::_State> >, void (*)()) /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:147
xbmc#3 0x7f6e31522028 (<unknown module>)
xbmc#4 0x7f6e27569d40 (/home/dobo/.kodi/cdm/libwidevinecdm.so+0x969d40)
xbmc#5 0x7f6e2757e7fc (/home/dobo/.kodi/cdm/libwidevinecdm.so+0x97e7fc)
xbmc#6 0x7f6e27569c36 (/home/dobo/.kodi/cdm/libwidevinecdm.so+0x969c36)
xbmc#7 0x7f6e3151fb28 (<unknown module>)
xbmc#8 0x7f6e3151c0b1 (<unknown module>)
xbmc#9 0x7f6e31526947 (<unknown module>)
xbmc#10 0x7f6e31526729 (<unknown module>)
xbmc#11 0x7f6e31526620 (<unknown module>)
xbmc#12 0x7f6e315265a1 (<unknown module>)
xbmc#13 0x7f6e31526585 (<unknown module>)
xbmc#14 0x7f6e46ed72c2 in execute_native_thread_routine /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:82
Thread T51 created by T45 here:
#0 0x7f6e49464207 in __interceptor_pthread_create /usr/src/debug/gcc/gcc/libsanitizer/asan/asan_interceptors.cpp:207
xbmc#1 0x7f6e46ed73a9 in __gthread_create /usr/src/debug/gcc/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:663
xbmc#2 0x7f6e46ed73a9 in std::thread::_M_start_thread(std::unique_ptr<std::thread::_State, std::default_delete<std::thread::_State> >, void (*)()) /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:147
xbmc#3 0x7f6e31522028 (<unknown module>)
xbmc#4 0x7f6e27569d40 (/home/dobo/.kodi/cdm/libwidevinecdm.so+0x969d40)
xbmc#5 0x7f6e2757e7fc (/home/dobo/.kodi/cdm/libwidevinecdm.so+0x97e7fc)
xbmc#6 0x7f6e2757e70e (/home/dobo/.kodi/cdm/libwidevinecdm.so+0x97e70e)
xbmc#7 0x7f6e274e4ecc (/home/dobo/.kodi/cdm/libwidevinecdm.so+0x8e4ecc)
xbmc#8 0x7f6e3151f280 (<unknown module>)
xbmc#9 0x7f6e314e9ea1 (<unknown module>)
xbmc#10 0x7f6e314e49bb (<unknown module>)
xbmc#11 0x7f6e314f45ce (<unknown module>)
xbmc#12 0x7f6e2889228f in SESSION::CSession::InitializeDRM(bool) /home/dobo/kodi/inputstream.adaptive/src/Session.cpp:643
xbmc#13 0x7f6e28893279 in SESSION::CSession::InitializePeriod(bool) /home/dobo/kodi/inputstream.adaptive/src/Session.cpp:723
xbmc#14 0x7f6e2888e36d in SESSION::CSession::Initialize() /home/dobo/kodi/inputstream.adaptive/src/Session.cpp:266
xbmc#15 0x7f6e28775f4c in CInputStreamAdaptive::Open(kodi::addon::InputstreamProperty const&) /home/dobo/kodi/inputstream.adaptive/src/main.cpp:101
xbmc#16 0x7f6e287871a1 in kodi::addon::CInstanceInputStream::ADDON_Open(AddonInstance_InputStream const*, INPUTSTREAM_PROPERTY*) (/usr/lib/kodi/addons/inputstream.adaptive/inputstream.adaptive.so.20.3.2+0x3871a1)
xbmc#17 0x55c2811f4ddc in CInputStreamAddon::Open() (/usr/lib/kodi/kodi.bin+0xb66ddc)
Thread T45 created by T0 here:
#0 0x7f6e49464207 in __interceptor_pthread_create /usr/src/debug/gcc/gcc/libsanitizer/asan/asan_interceptors.cpp:207
xbmc#1 0x7f6e46ed73a9 in __gthread_create /usr/src/debug/gcc/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:663
xbmc#2 0x7f6e46ed73a9 in std::thread::_M_start_thread(std::unique_ptr<std::thread::_State, std::default_delete<std::thread::_State> >, void (*)()) /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:147
```
The root cause of the crash is unknown as it comes directly from
libwidevine library. But it crashes when we call cdm->TimerExpired when
the session is closed. After applying mentioned commit I'm not able
to reproduce the crash anymore.
Script to reproduce the issue:
```
set -x
URI='Change it to some uri to play'
while true; do
curl -s "http://kodi:[email protected]:8080/jsonrpc" -H 'Content-Type: application/json' --data "{\"jsonrpc\":\"2.0\",\"method\":\"Player.Open\",\"params\":{\"item\":{\"file\":\"$URI\"}}}"
sleep $[ ($RANDOM % 70 + 30) / 10.0 ]
curl -s "http://kodi:[email protected]:8080/jsonrpc" -H 'Content-Type: application/json' --data '{"jsonrpc":"2.0","method":"Player.Stop","params":{"playerid":1}}'
sleep 1
done
```
11 tasks
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