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Here __loadsegment_simple() sets %gs=0, invalidating the following accesses to percpu data, including those happening inside __msan_get_context_state(), which KMSAN adds to every function call.
Right now KMSAN does not play well with
CONFIG_XEN_PV=y
In particular, the kernel crashes at boot-time on the following code:
Here __loadsegment_simple() sets %gs=0, invalidating the following accesses to percpu data, including those happening inside
__msan_get_context_state()
, which KMSAN adds to every function call.The behavior of
load_percpu_segment()
is being fixed upstream: https://lore.kernel.org/lkml/166601847113.401.13616810593513367893.tip-bot2@tip-bot2/, but CONFIG_XEN_PV still generates a bunch of KMSAN reports, so we'd better keep it disabled for now.The text was updated successfully, but these errors were encountered: