https://bugs.kde.org/show_bug.cgi?id=479996
Bug ID: 479996
Summary: Segmentation fault on aarch64 checking programs built
with -fstack-check
Classification: Developer tools
Product: valgrind
Version: 3.20.0
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: memcheck
Assignee: jsew...@acm.org
Reporter: e...@debian.org
Target Milestone: ---
Hi,
On aarch64, using valgrind on the following program built with -fstack-check
results in a segmentation fault:
// example.c
void a_function() { char buf[10752]; }
int main() { a_function(); }
gcc -fstack-check example.c -o example && valgrind ./example
==2743238== Memcheck, a memory error detector
==2743238== Copyright (C) 2002-2022, and GNU GPL'd, by Julian Seward et al.
==2743238== Using Valgrind-3.20.0 and LibVEX; rerun with -h for copyright info
==2743238== Command: ./example
==2743238==
==2743238== Invalid write of size 8
==2743238== at 0x10873C: main (in /tmp/example)
==2743238== Address 0x1ffefff9c0 is on thread 1's stack
==2743238== 4112 bytes below stack pointer
==2743238==
==2743238== Invalid write of size 8
==2743238== at 0x108718: a_function (in /tmp/example)
==2743238== by 0x10874B: main (in /tmp/example)
==2743238== Address 0x1ffeffe9c0 is on thread 1's stack
==2743238== 8192 bytes below stack pointer
==2743238==
==2743238== Invalid write of size 8
==2743238== at 0x108720: a_function (in /tmp/example)
==2743238== by 0x10874B: main (in /tmp/example)
==2743238== Address 0x1ffeffdfc0 is not stack'd, malloc'd or (recently) free'd
==2743238==
==2743238==
==2743238== Process terminating with default action of signal 11 (SIGSEGV)
==2743238== Access not within mapped region at address 0x1FFEFFDFC0
==2743238== at 0x108720: a_function (in /tmp/example)
==2743238== by 0x10874B: main (in /tmp/example)
==2743238== If you believe this happened as a result of a stack
==2743238== overflow in your program's main thread (unlikely but
==2743238== possible), you can try to increase the size of the
==2743238== main thread stack using the --main-stacksize= flag.
==2743238== The main thread stack size used in this run was 8388608.
==2743238==
==2743238== HEAP SUMMARY:
==2743238== in use at exit: 0 bytes in 0 blocks
==2743238== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==2743238==
==2743238== All heap blocks were freed -- no leaks are possible
==2743238==
==2743238== For lists of detected and suppressed errors, rerun with: -s
==2743238== ERROR SUMMARY: 3 errors from 3 contexts (suppressed: 0 from 0)
Segmentation fault
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