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authorNoah Goldstein <goldstein.w.n@gmail.com>2021-06-09 16:17:14 -0400
committerNoah Goldstein <goldstein.w.n@gmail.com>2021-06-23 14:13:00 -0400
commitda5a6fba0febbfc90896ce1b2eb75c6d8a88a72d (patch)
treeb0b24fa0d148725804d45f3204c985243d38d526 /sysdeps/x86_64/multiarch/strlen-avx2.S
parent6f573a27b6c8b4236445810a44660612323f5a73 (diff)
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String: Add overflow tests for strnlen, memchr, and strncat [BZ #27974]
This commit adds tests for a bug in the wide char variant of the
functions where the implementation may assume that maxlen for wcsnlen
or n for wmemchr/strncat will not overflow when multiplied by
sizeof(wchar_t).

These tests show the following implementations failing on x86_64:

wcsnlen-sse4_1
wcsnlen-avx2

wmemchr-sse2
wmemchr-avx2

strncat would fail as well if it where on a system that prefered
either of the wcsnlen implementations that failed as it relies on
wcsnlen.

Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
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