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crypto: sha256_ssse3 - fix stack corruption with SSSE3 and AVX implementations

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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>
This commit is contained in:
Jussi Kivilinna 2013-05-21 17:09:41 +03:00 committed by Herbert Xu
parent 286233e604
commit de614e561b
2 changed files with 2 additions and 2 deletions
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2
arch/x86/crypto/sha256-avx-asm.S
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@ -118,7 +118,7 @@ y2 = %r15d
_INP_END_SIZE = 8
_INP_SIZE = 8
_XFER_SIZE = 8
_XFER_SIZE = 16
_XMM_SAVE_SIZE = 0
_INP_END = 0

2
arch/x86/crypto/sha256-ssse3-asm.S
View File

@ -111,7 +111,7 @@ y2 = %r15d
_INP_END_SIZE = 8
_INP_SIZE = 8
_XFER_SIZE = 8
_XFER_SIZE = 16
_XMM_SAVE_SIZE = 0
_INP_END = 0