Handle the case when the caller provided a zero buffer to sendmsg/sendpage. Such scenario is legal for AEAD ciphers when no plaintext / ciphertext and no AAD is provided and the caller only requests the generation of the tag value. Signed-off-by: Stephan Mueller <smueller@xxxxxxxxxx> --- crypto/algif_aead.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/crypto/algif_aead.c b/crypto/algif_aead.c index 0212cc2..d52e8b2 100644 --- a/crypto/algif_aead.c +++ b/crypto/algif_aead.c @@ -510,12 +510,13 @@ static int aead_recvmsg_async(struct socket *sock, struct msghdr *msg, aead_async_cb, sk); /* take over all tx sgls from ctx */ - areq->tsgl = sock_kmalloc(sk, sizeof(*areq->tsgl) * sgl->cur, + areq->tsgl = sock_kmalloc(sk, + sizeof(*areq->tsgl) * max_t(u32, sgl->cur, 1), GFP_KERNEL); if (unlikely(!areq->tsgl)) goto free; - sg_init_table(areq->tsgl, sgl->cur); + sg_init_table(areq->tsgl, max_t(u32, sgl->cur, 1)); for (i = 0; i < sgl->cur; i++) sg_set_page(&areq->tsgl[i], sg_page(&sgl->sg[i]), sgl->sg[i].length, sgl->sg[i].offset); -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
