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From: "stsp at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/101476] AddressSanitizer check failed, points out a
 (potentially) non-existing stack error
Date: Tue, 18 Jan 2022 23:01:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101476

--- Comment #7 from Stas Sergeev <stsp at users dot sourceforge.net> ---
Created attachment 52221
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D52221&action=3Dedit
test case

This is a reproducer for both problems.

$ cc -Wall -o bug -ggdb3 -fsanitize=3Daddress bug.c -O1
to see the canary overwrite problem.

$ cc -Wall -o bug -ggdb3 -fsanitize=3Daddress bug.c -O0
to see the poisoned stack after pthread_cancel()
problem.=