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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-01-03 12:19:12 -0200 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-01-03 14:24:53 -0200 |
| commit | 8dad72997af2be0dc72a4bc7dbe82d85c90334fc (patch) | |
| tree | dc5d83dfccb1e2fba0354ecc9f13a538d47fbb42 /ChangeLog | |
| parent | d4d629e6187e33050902824a94498b6096eacac9 (diff) | |
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Fix x86 strncat optimized implementation for large sizes
Similar to BZ#19387, BZ#21014, and BZ#20971, both x86 sse2 strncat
optimized assembly implementations do not handle the size overflow
correctly.
The x86_64 one is in fact an issue with strcpy-sse2-unaligned, but
that is triggered also with strncat optimized implementation.
This patch uses a similar strategy used on 3daef2c8ee4df2, where
saturared math is used for overflow case.
Checked on x86_64-linux-gnu and i686-linux-gnu. It fixes BZ #19390.
[BZ #19390]
* string/test-strncat.c (test_main): Add tests with SIZE_MAX as
maximum string size.
* sysdeps/i386/i686/multiarch/strcat-sse2.S (STRCAT): Avoid overflow
in pointer addition.
* sysdeps/x86_64/multiarch/strcpy-sse2-unaligned.S (STRCPY):
Likewise.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 10 |
1 files changed, 10 insertions, 0 deletions
@@ -1,3 +1,13 @@ +2017-01-03 Adhemerval Zanella <adhemerval.zanella@linaro.org> + + [BZ #19390] + * string/test-strncat.c (test_main): Add tests with SIZE_MAX as + maximum string size. + * sysdeps/i386/i686/multiarch/strcat-sse2.S (STRCAT): Avoid overflow + in pointer addition. + * sysdeps/x86_64/multiarch/strcpy-sse2-unaligned.S (STRCPY): + Likewise. + 2017-01-03 Joseph Myers <joseph@codesourcery.com> * elf/Makefile ($(objpfx)tst-ldconfig-X.out): Correct arguments |