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Commit 202736d9 authored by Herbert Xu's avatar Herbert Xu
Browse files

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: 0f477b65 ("crypto: algif - Mark sgl end at the end of data")
Cc: stable@vger.kernel.org
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent fd7f6727

crypto/algif_skcipher.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -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);

		sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);

		sg = sgl->sg;

		sg = sgl->sg;

		sg_unmark_end(sg + sgl->cur);

		if (sgl->cur)

			sg_unmark_end(sg + sgl->cur - 1);

		do {

		do {

			i = sgl->cur;

			i = sgl->cur;

			plen = min_t(size_t, len, PAGE_SIZE);

			plen = min_t(size_t, len, PAGE_SIZE);