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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-11 09:23:07 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-11 09:23:07 -0800
commit65d57b3050eed3d848e51761904668b5d156743c (patch)
tree3445d4ea3d11415cf570e56d5dbd74c5578836de /crypto
parentc8fff3ed321abf11bea7464884b0876c46ff2491 (diff)
parent4afa5f9617927453ac04b24b584f6c718dfb4f45 (diff)
downloadlinux-sh-65d57b3050eed3d848e51761904668b5d156743c.tar.gz
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fix from Herbert Xu: "This fixes a bug in the algif_hash interface that may lead to crashes when used with certain algorithms such as HMAC" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: algif_hash - Only export and import on sockets with data
Diffstat (limited to 'crypto')
-rw-r--r--crypto/algif_hash.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c
index 1396ad0787fc..b4c24fe3dcfb 100644
--- a/crypto/algif_hash.c
+++ b/crypto/algif_hash.c
@@ -181,9 +181,14 @@ static int hash_accept(struct socket *sock, struct socket *newsock, int flags)
struct sock *sk2;
struct alg_sock *ask2;
struct hash_ctx *ctx2;
+ bool more;
int err;
- err = crypto_ahash_export(req, state);
+ lock_sock(sk);
+ more = ctx->more;
+ err = more ? crypto_ahash_export(req, state) : 0;
+ release_sock(sk);
+
if (err)
return err;
@@ -194,7 +199,10 @@ static int hash_accept(struct socket *sock, struct socket *newsock, int flags)
sk2 = newsock->sk;
ask2 = alg_sk(sk2);
ctx2 = ask2->private;
- ctx2->more = 1;
+ ctx2->more = more;
+
+ if (!more)
+ return err;
err = crypto_ahash_import(&ctx2->req, state);
if (err) {