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[Bug libc/15674] __memcmp_ssse3 tries to read past the array bounary
- From: "liubov.dmitrieva at gmail dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Tue, 25 Jun 2013 12:51:02 +0000
- Subject: [Bug libc/15674] __memcmp_ssse3 tries to read past the array bounary
- Auto-submitted: auto-generated
- References: <bug-15674-131 at http dot sourceware dot org/bugzilla/>
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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