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authorKent Yoder <key@linux.vnet.ibm.com>2012-04-05 20:34:20 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2012-04-05 20:34:20 +0800
commit25c3d30c918207556ae1d6e663150ebdf902186b (patch)
treec495e4b2cdccb9da41d6b0a3c74a8df05d1d47df /crypto
parent5219a5342ab13650ae0f0c62319407268c48d0ab (diff)
downloadlinux-25c3d30c918207556ae1d6e663150ebdf902186b.tar.gz
crypto: sha512 - Fix byte counter overflow in SHA-512
The current code only increments the upper 64 bits of the SHA-512 byte counter when the number of bytes hashed happens to hit 2^64 exactly. This patch increments the upper 64 bits whenever the lower 64 bits overflows. Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com> Cc: stable@kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/sha512_generic.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/sha512_generic.c b/crypto/sha512_generic.c
index 107f6f7be5e..dd30f40af9f 100644
--- a/crypto/sha512_generic.c
+++ b/crypto/sha512_generic.c
@@ -174,7 +174,7 @@ sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len)
index = sctx->count[0] & 0x7f;
/* Update number of bytes */
- if (!(sctx->count[0] += len))
+ if ((sctx->count[0] += len) < len)
sctx->count[1]++;
part_len = 128 - index;