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| author | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2013-05-21 17:09:41 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2013-05-28 13:46:47 +0800 |
| commit | de614e561b9c633073caae8f86399aa8923ef85d (patch) | |
| tree | a95cbac49c0cf81bb59c2f3346b6c5bca4ecefb8 /arch | |
| parent | 286233e604d79f0c7fa04abec2180d5d89a74749 (diff) | |
| download | lwn-de614e561b9c633073caae8f86399aa8923ef85d.tar.gz lwn-de614e561b9c633073caae8f86399aa8923ef85d.zip | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/crypto/sha256-avx-asm.S | 2 | ||||
| -rw-r--r-- | arch/x86/crypto/sha256-ssse3-asm.S | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/crypto/sha256-avx-asm.S b/arch/x86/crypto/sha256-avx-asm.S index 56610c4bf31b..642f15687a0a 100644 --- a/arch/x86/crypto/sha256-avx-asm.S +++ b/arch/x86/crypto/sha256-avx-asm.S @@ -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 diff --git a/arch/x86/crypto/sha256-ssse3-asm.S b/arch/x86/crypto/sha256-ssse3-asm.S index 98d3c391da81..f833b74d902b 100644 --- a/arch/x86/crypto/sha256-ssse3-asm.S +++ b/arch/x86/crypto/sha256-ssse3-asm.S @@ -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 |