iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

crypto: algif_skcipher - sendmsg SG marking is off by one

Browse Source 
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: 0f477b655a ("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>
This commit is contained in:
Herbert Xu 2016-01-19 21:23:57 +08:00
parent fd7f672710
commit 202736d99b
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
crypto/algif_skcipher.c
View File

@ -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);