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authorHerbert Xu <herbert@gondor.apana.org.au>2016-01-19 21:23:57 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2016-01-20 21:15:45 +0800
commit202736d99b7f29279db9da61587f11a08a04a9c6 (patch)
tree7ec8d1d32fc795eb30a473580d861398454c3a26
parentfd7f6727102a1ccf6b4c1dfcc631f9b546526b26 (diff)
downloadlinux-202736d99b7f29279db9da61587f11a08a04a9c6.tar.bz2
crypto: algif_skcipher - sendmsg SG marking is off by one
We mark the end of the SG list in sendmsg and sendpage and unmark it on the next send call. Unfortunately the unmarking in sendmsg is off-by-one, leading to an SG list that is too short. Fixes: 0f477b655a52 ("crypto: algif - Mark sgl end at the end of data") Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/algif_skcipher.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index df86fb47c3ae..a81c10faf9c4 100644
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -392,7 +392,8 @@ static int skcipher_sendmsg(struct socket *sock, struct msghdr *msg,
sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);
sg = sgl->sg;
- sg_unmark_end(sg + sgl->cur);
+ if (sgl->cur)
+ sg_unmark_end(sg + sgl->cur - 1);
do {
i = sgl->cur;
plen = min_t(size_t, len, PAGE_SIZE);