[PATCH 3.12 149/170] crypto: sha512_ssse3 - fix byte count to bit count conversion

Jiri Slaby
2014-07-18T13:11:37Z

From: Jussi Kivilinna <jussi.kivilinna@iki.fi>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit cfe82d4f45c7cc39332a2be7c4c1d3bf279bbd3d upstream.

Byte-to-bit-count computation is only partly converted to big-endian and is
mixing in CPU-endian values. Problem was noticed by sparce with warning:

CHECK arch/x86/crypto/sha512_ssse3_glue.c
arch/x86/crypto/sha512_ssse3_glue.c:144:19: warning: restricted __be64 degrades to integer
arch/x86/crypto/sha512_ssse3_glue.c:144:17: warning: incorrect type in assignment (different base types)
arch/x86/crypto/sha512_ssse3_glue.c:144:17: expected restricted __be64 <noident>
arch/x86/crypto/sha512_ssse3_glue.c:144:17: got unsigned long long

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Acked-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
arch/x86/crypto/sha512_ssse3_glue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/crypto/sha512_ssse3_glue.c b/arch/x86/crypto/sha512_ssse3_glue.c
index f30cd10293f0..8626b03e83b7 100644
--- a/arch/x86/crypto/sha512_ssse3_glue.c
+++ b/arch/x86/crypto/sha512_ssse3_glue.c
@@ -141,7 +141,7 @@ static int sha512_ssse3_final(struct shash_desc *desc, u8 *out)

/* save number of bits */
bits[1] = cpu_to_be64(sctx->count[0] << 3);
- bits[0] = cpu_to_be64(sctx->count[1] << 3) | sctx->count[0] >> 61;
+ bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);

/* Pad out to 112 mod 128 and append length */
index = sctx->count[0] & 0x7f;
--
2.0.0