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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2022-10-11 15:24:41 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2022-11-22 14:24:26 +0000 |
| commit | 1fb0a3690270bcf3e5eb9d978bf050bfe1261c93 (patch) | |
| tree | 1bc817c67b38fc7f635a85df9a088ab8bcc85813 /malloc/alloc_buffer_alloc_array.c | |
| parent | 5aa16bb318c542cc9a2a5b48cf90b5dd8f0873ec (diff) | |
| download | glibc-1fb0a3690270bcf3e5eb9d978bf050bfe1261c93.tar.xz glibc-1fb0a3690270bcf3e5eb9d978bf050bfe1261c93.zip | |
Fix OOB read in stdlib thousand grouping parsing [BZ #29727]
__correctly_grouped_prefixmb only worked with thousands_len == 1,
otherwise it read past the end of cp or thousands.
This affects scanf formats like %'d, %'f and the internal but
exposed __strto{l,ul,f,d,..}_internal with grouping flag set
and an LC_NUMERIC locale where thousands_len > 1.
Avoid OOB access by considering thousands_len when initializing cp.
This fixes bug 29727.
Found by the morello port with strict bounds checking where
FAIL: stdlib/tst-strtod4
FAIL: stdlib/tst-strtod5i
crashed using a locale with thousands_len==3.
Diffstat (limited to 'malloc/alloc_buffer_alloc_array.c')
0 files changed, 0 insertions, 0 deletions