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| author | Jan Kratochvil <jan.kratochvil@redhat.com> | 2014-08-19 22:55:10 +0200 |
|---|---|---|
| committer | Jan Kratochvil <jan.kratochvil@redhat.com> | 2014-08-19 22:55:10 +0200 |
| commit | 6694c4110a37bc951d01132d6e56445d57350627 (patch) | |
| tree | 817a90a208ffc14ea5b6893334e6b12ffa658600 /gdb/machoread.c | |
| parent | 0718a8da7b359f184e1b3a866645cc2f9611771b (diff) | |
| download | gdb-6694c4110a37bc951d01132d6e56445d57350627.zip gdb-6694c4110a37bc951d01132d6e56445d57350627.tar.gz gdb-6694c4110a37bc951d01132d6e56445d57350627.tar.bz2 | |
Fix -fsanitize=address on unreadable inferior strings
echo 'void f(char *s){}main(){f((char *)1);}'|gcc -g -x c -;../gdb ./a.out -ex 'b f' -ex r
====ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6020000aaccf at pc 0x96eea7 bp 0x7fff75bdbc90 sp 0x7fff75bdbc80
READ of size 1 at 0x6020000aaccf thread T0
#0 0x96eea6 in extract_unsigned_integer .../gdb/findvar.c:108
#1 0x9df02b in val_print_string .../gdb/valprint.c:2513
[...]
0x6020000aaccf is located 1 bytes to the left of 8-byte region [0x6020000aacd0,0x6020000aacd8)
allocated by thread T0 here:
#0 0x7f45fad26b97 in malloc (/lib64/libasan.so.1+0x57b97)
#1 0xdb3409 in xmalloc common/common-utils.c:45
#2 0x9d8cf9 in read_string .../gdb/valprint.c:1845
#3 0x9defca in val_print_string .../gdb/valprint.c:2502
[..]
====ABORTING
gdb/
2014-08-18 Jan Kratochvil <jan.kratochvil@redhat.com>
Fix -fsanitize=address on unreadable inferior strings.
* valprint.c (val_print_string): Fix access before BUFFER.
Diffstat (limited to 'gdb/machoread.c')
0 files changed, 0 insertions, 0 deletions