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crypto: algif - explicitly mark end of data 

After the TX sgl is expanded we need to explicitly mark end of data
at the last buffer that contains data.

Changes in v2
 - use type 'bool' and true/false for 'mark'.

Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
tadeusz.struk@intel.com 2015-04-01 13:53:06 -07:00 committed by David S. Miller
parent 99949a74aa
commit 033f46b3c1
1 changed files with 8 additions and 4 deletions
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12
crypto/algif_skcipher.c
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@ -509,11 +509,11 @@ static int skcipher_recvmsg_async(struct socket *sock, struct msghdr *msg,
struct skcipher_async_req *sreq;
struct ablkcipher_request *req;
struct skcipher_async_rsgl *last_rsgl = NULL;
unsigned int len = 0, tx_nents = skcipher_all_sg_nents(ctx);
unsigned int txbufs = 0, len = 0, tx_nents = skcipher_all_sg_nents(ctx);
unsigned int reqlen = sizeof(struct skcipher_async_req) +
GET_REQ_SIZE(ctx) + GET_IV_SIZE(ctx);
int i = 0;
int err = -ENOMEM;
bool mark = false;
lock_sock(sk);
req = kmalloc(reqlen, GFP_KERNEL);
@ -555,7 +555,7 @@ static int skcipher_recvmsg_async(struct socket *sock, struct msghdr *msg,
iov_iter_count(&msg->msg_iter));
used = min_t(unsigned long, used, sg->length);
if (i == tx_nents) {
if (txbufs == tx_nents) {
struct scatterlist *tmp;
int x;
/* Ran out of tx slots in async request
@ -573,10 +573,11 @@ static int skcipher_recvmsg_async(struct socket *sock, struct msghdr *msg,
kfree(sreq->tsg);
sreq->tsg = tmp;
tx_nents *= 2;
mark = true;
}
/* Need to take over the tx sgl from ctx
* to the asynch req - these sgls will be freed later */
sg_set_page(sreq->tsg + i++, sg_page(sg), sg->length,
sg_set_page(sreq->tsg + txbufs++, sg_page(sg), sg->length,
sg->offset);
if (list_empty(&sreq->list)) {
@ -604,6 +605,9 @@ static int skcipher_recvmsg_async(struct socket *sock, struct msghdr *msg,
iov_iter_advance(&msg->msg_iter, used);
}
if (mark)
sg_mark_end(sreq->tsg + txbufs - 1);
ablkcipher_request_set_crypt(req, sreq->tsg, sreq->first_sgl.sgl.sg,
len, sreq->iv);
err = ctx->enc ? crypto_ablkcipher_encrypt(req) :