4.2.8-ckt3 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
commit 202736d99b7f29279db9da61587f11a08a04a9c6 upstream.
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")
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
crypto/algif_skcipher.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index 1a0fe4f..9565568 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(int, len, PAGE_SIZE);
--
1.9.1
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