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[Bug libc/15674] __memcmp_ssse3 tries to read past the array bounary


http://sourceware.org/bugzilla/show_bug.cgi?id=15674

--- Comment #2 from Liubov Dmitrieva <liubov.dmitrieva at gmail dot com> ---
This patch fixes the issue. Tested on my machines.

diff --git a/sysdeps/x86_64/multiarch/memcmp-ssse3.S
b/sysdeps/x86_64/multiarch/memcmp-ssse3.S
index bdd2ed2..e319df9 100644
--- a/sysdeps/x86_64/multiarch/memcmp-ssse3.S
+++ b/sysdeps/x86_64/multiarch/memcmp-ssse3.S
@@ -1463,10 +1463,8 @@ L(next_24_bytes):
        test    $0x40, %dh
        jnz     L(Byte22)

-       mov     -9(%rdi), %eax
-       and     $0xff, %eax
-       mov     -9(%rsi), %edx
-       and     $0xff, %edx
+       movzbl  -9(%rdi), %eax
+       movzbl  -9(%rsi), %edx
        sub     %edx, %eax
        ret
 # else

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