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authorHerbert Xu <herbert@gondor.apana.org.au>2015-12-30 20:24:17 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2016-01-18 18:16:10 +0800
commita383292c86663bbc31ac62cc0c04fc77504636a6 (patch)
treedbc55e2abd13c348dfe6aac886102b5bb3293bed
parentc840ac6af3f8713a71b4d2363419145760bd6044 (diff)
downloadlinux-a383292c86663bbc31ac62cc0c04fc77504636a6.tar.bz2
crypto: af_alg - Fix socket double-free when accept fails
When we fail an accept(2) call we will end up freeing the socket twice, once due to the direct sk_free call and once again through newsock. This patch fixes this by removing the sk_free call. Cc: stable@vger.kernel.org Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/af_alg.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index 7b5b5926c767..eaf98e287d89 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -285,10 +285,8 @@ int af_alg_accept(struct sock *sk, struct socket *newsock)
security_sk_clone(sk, sk2);
err = type->accept(ask->private, sk2);
- if (err) {
- sk_free(sk2);
+ if (err)
goto unlock;
- }
sk2->sk_family = PF_ALG;