https://sourceware.org/bugzilla/show_bug.cgi?id=23453
Bug ID: 23453
Summary: segmentation fault in config/tc-i386.c, line 3989
Product: binutils
Version: 2.32 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: bugs at feusi dot co
Target Milestone: ---
Created attachment 11153
--> https://sourceware.org/bugzilla/attachment.cgi?id=11153&action=edit
File which causes segfault
Hi,
I am working on a project in which I use the honggfuzz fuzzer to find bugs in
open-source software and I decided to fuzz gas. In doing so, I discovered a
segmentation fault in config/tc-i386.c, line 3989. Following is a detailed
backtrace, as supplied by the address sanitizer:
ASAN:DEADLYSIGNAL
=================================================================
==47033==ERROR: AddressSanitizer: SEGV on unknown address 0x55d1308f2630 (pc
0x7f7e731472c5 bp 0x7ffc7b39ab50 sp 0x7ffc7b39ab00 T0)
==47033==The signal is caused by a WRITE memory access.
#0 0x7f7e731472c4 (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x262c4)
#1 0x7f7e731fa8a3 in __interceptor_free
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0xd98a3)
#2 0x55d13006afe5 in md_assemble config/tc-i386.c:3989
#3 0x55d12ff9ebb6 in assemble_one
/home/jfe/binutils-gdb-noasan/gas/read.c:711
#4 0x55d12ff9ebb6 in read_a_source_file
/home/jfe/binutils-gdb-noasan/gas/read.c:1179
#5 0x55d12fec0bb9 in perform_an_assembly_pass
/home/jfe/binutils-gdb-noasan/gas/as.c:1187
#6 0x55d12fec0bb9 in main /home/jfe/binutils-gdb-noasan/gas/as.c:1331
#7 0x7f7e72b84a86 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21a86)
#8 0x55d12fec4db9 in _start
(/home/jfe/binutils-gdb-noasan/gas/as-new+0x117db9)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0x262c4)
==47033==ABORTING
To reproduce this bug, run "gas /dev/stdin -o /dev/null<min", where min is the
file attached.
cheers
project-repo
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