| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 099/117] crypto: algif_skcipher - sendmsg SG marking is off by one | Date | Sun, 14 Feb 2016 14:22:16 -0800 |
| |
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Herbert Xu <herbert@gondor.apana.org.au>
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@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- crypto/algif_skcipher.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/crypto/algif_skcipher.c +++ b/crypto/algif_skcipher.c @@ -392,7 +392,8 @@ static int skcipher_sendmsg(struct socke 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);
|