http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55380
Bug #: 55380
Summary: All search_line_fast implementations read beyond
buffer
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: hjl.to...@gmail.com
Depends on: 54691
Similar to PR 54691, GCC built with -faddress-sanitizer leads
to
==7876== ERROR: AddressSanitizer heap-buffer-overflow on address 0x7f3484513ff0
at pc 0x1e792db bp 0x7fffbed86340 sp 0x7fffbed86338
READ of size 16 at 0x7f3484513ff0 thread T0
#0 0x1e792da
(/export/build/gnu/gcc-asan/build-x86_64-linux/gcc/cc1+0x1e792da)
0x7f3484513ff0 is located 0 bytes to the right of 4021-byte region
[0x7f3484513040,0x7f3484513ff5)
allocated by thread T0 here:
#0 0x1f2d48c
(/export/build/gnu/gcc-asan/build-x86_64-linux/gcc/cc1+0x1f2d48c)
#1 0x1f2609c
(/export/build/gnu/gcc-asan/build-x86_64-linux/gcc/cc1+0x1f2609c)
Shadow byte and word:
0x1fe6908a27fe: 5
0x1fe6908a27f8: 00 00 00 00 00 00 05 fb
[hjl@gnu-tools-1 gcc]$ addr2line -e cc1 0x1e792da
/export/gnu/import/git/sources/gcc/libcpp/lex.c:393
[hjl@gnu-tools-1 gcc]$
All search_line_fast implementations read beyond buffer.
