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| author | Mathias Krause <minipli@googlemail.com> | 2012-05-30 01:43:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-17 11:21:24 -0700 |
| commit | cc62e8bf1f779a54369e71e665211140a254df5c (patch) | |
| tree | c3bfe92d3087e30ce9b5616df0f9a3a2caffd268 /arch | |
| parent | 25ffc87a852380b75e5ce9618164f506b1254112 (diff) | |
| download | linux-3.10-cc62e8bf1f779a54369e71e665211140a254df5c.tar.gz linux-3.10-cc62e8bf1f779a54369e71e665211140a254df5c.tar.bz2 linux-3.10-cc62e8bf1f779a54369e71e665211140a254df5c.zip | |
crypto: aesni-intel - fix unaligned cbc decrypt for x86-32
commit 7c8d51848a88aafdb68f42b6b650c83485ea2f84 upstream.
The 32 bit variant of cbc(aes) decrypt is using instructions requiring
128 bit aligned memory locations but fails to ensure this constraint in
the code. Fix this by loading the data into intermediate registers with
load unaligned instructions.
This fixes reported general protection faults related to aesni.
References: https://bugzilla.kernel.org/show_bug.cgi?id=43223
Reported-by: Daniel <garkein@mailueberfall.de>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/crypto/aesni-intel_asm.S | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/crypto/aesni-intel_asm.S b/arch/x86/crypto/aesni-intel_asm.S index be6d9e365a8..3470624d783 100644 --- a/arch/x86/crypto/aesni-intel_asm.S +++ b/arch/x86/crypto/aesni-intel_asm.S @@ -2460,10 +2460,12 @@ ENTRY(aesni_cbc_dec) pxor IN3, STATE4 movaps IN4, IV #else - pxor (INP), STATE2 - pxor 0x10(INP), STATE3 pxor IN1, STATE4 movaps IN2, IV + movups (INP), IN1 + pxor IN1, STATE2 + movups 0x10(INP), IN2 + pxor IN2, STATE3 #endif movups STATE1, (OUTP) movups STATE2, 0x10(OUTP) |