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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2018-09-19 16:50:18 +0100 |
|---|---|---|
| committer | Wilco Dijkstra <wdijkstr@arm.com> | 2018-09-21 12:09:38 +0100 |
| commit | 0ef2f4400c06927af34c515555f68840a70ba409 (patch) | |
| tree | 1656859044b6ea40520a4078581e7f81e0426be7 /sysdeps/unix/sysv/linux/pwritev2.c | |
| parent | a55e109709af55e6ed67d3f9536cac5d929c982e (diff) | |
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Fix strstr bug with huge needles (bug 23637)
The generic strstr in GLIBC 2.28 fails to match huge needles. The optimized
AVAILABLE macro reads ahead a large fixed amount to reduce the overhead of
repeatedly checking for the end of the string. However if the needle length
is larger than this, two_way_long_needle may confuse this as meaning the end
of the string and return NULL. This is fixed by adding the needle length to
the amount to read ahead.
[BZ #23637]
* string/test-strstr.c (pr23637): New function.
(test_main): Add tests with longer needles.
* string/strcasestr.c (AVAILABLE): Fix readahead distance.
* string/strstr.c (AVAILABLE): Likewise.
(cherry picked from commit 83a552b0bb9fc2a5e80a0ab3723c0a80ce1db9f2)
Diffstat (limited to 'sysdeps/unix/sysv/linux/pwritev2.c')
0 files changed, 0 insertions, 0 deletions