crypto: sha256_ssse3 - fix stack corruption with SSSE3 and AVX implementations
authorJussi Kivilinna <jussi.kivilinna@iki.fi>
Tue, 21 May 2013 14:09:41 +0000 (17:09 +0300)
committerHerbert Xu <herbert@gondor.apana.org.au>
Tue, 28 May 2013 05:46:47 +0000 (13:46 +0800)
commitde614e561b9c633073caae8f86399aa8923ef85d
treea95cbac49c0cf81bb59c2f3346b6c5bca4ecefb8
parent286233e604d79f0c7fa04abec2180d5d89a74749
crypto: sha256_ssse3 - fix stack corruption with SSSE3 and AVX implementations

The _XFER stack element size was set too small, 8 bytes, when it needs to be
16 bytes. As _XFER is the last stack element used by these implementations,
the 16 byte stores with 'movdqa' corrupt the stack where the value of register
%r12 is temporarily stored. As these implementations align the stack pointer
to 16 bytes, this corruption did not happen every time.

Patch corrects this issue.

Reported-by: Julian Wollrath <jwollrath@web.de>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Tested-by: Julian Wollrath <jwollrath@web.de>
Acked-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
arch/x86/crypto/sha256-avx-asm.S
arch/x86/crypto/sha256-ssse3-asm.S