https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110027
Christoph Erhardt <gcc at sicherha dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gcc at sicherha dot de
--- Comment #4 from Christoph Erhardt <gcc at sicherha dot de> ---
Created attachment 56169
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56169&action=edit
Reproducer program
Here's a program that can reproduce this issue more reliably - tested on Fedora
38, Ubuntu 23.04 and Ubuntu 23.10.
I have stripped down the code as far as possible. This is how far I could get
without losing reproducibility.
Sources are in a GitHub repo:
https://github.com/sicherha/gcc-asan-stack-misalign
$ gcc -Wall -Wextra -g -Og -fsanitize=address -fno-stack-protector -mavx512f
a-repro.i
$ ./a.out
AddressSanitizer:DEADLYSIGNAL
=================================================================
==3618==ERROR: AddressSanitizer: SEGV on unknown address (pc 0x000000401789 bp
0x7ffeabbcda00 sp 0x7ffeabbcd580 T0)
==3618==The signal is caused by a READ memory access.
==3618==Hint: this fault was caused by a dereference of a high value address
(see register values below). Disassemble the provided pc to learn which
register was used.
#0 0x401789 in blake3_compress_subtree_wide
/home/ul26967/Projects/gcc-asan-stack-misalign/a-repro.i:481
#1 0x40189b in main
/home/ul26967/Projects/gcc-asan-stack-misalign/a-repro.i:488
#2 0x7f77a0210b89 in __libc_start_call_main (/lib64/libc.so.6+0x27b89)
(BuildId: 3ebe8d97a0ed3e1f13476a02665c5a9442adcd78)
#3 0x7f77a0210c4a in __libc_start_main_alias_2 (/lib64/libc.so.6+0x27c4a)
(BuildId: 3ebe8d97a0ed3e1f13476a02665c5a9442adcd78)
#4 0x4010f4 in _start
(/home/ul26967/Projects/gcc-asan-stack-misalign/a.out+0x4010f4) (BuildId:
e25b3ac48fa6dd8cff5d228e201834fa1b0cd18a)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV
/home/ul26967/Projects/gcc-asan-stack-misalign/a-repro.i:481 in
blake3_compress_subtree_wide
==3618==ABORTING
