diff options
| author | LABBE Corentin <clabbe.montjoie@gmail.com> | 2015-11-04 21:13:38 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-11-17 22:00:38 +0800 |
| commit | f9970c2865d300bd0bb4ba006a0283a8ffa51ada (patch) | |
| tree | 35f5e47600be22a103d1f798d893b989c22983ce | |
| parent | f051f95eb47bb216ad0a8fbe64b4be179cc5abec (diff) | |
crypto: caam - check return value of sg_nents_for_len
The sg_nents_for_len() function could fail, this patch add a check for
its return value.
We do the same for sg_count since it use sg_nents_for_len().
Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/caam/caamhash.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index 49106ea42887..fe9c156333ca 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -803,6 +803,10 @@ static int ahash_update_ctx(struct ahash_request *req) if (to_hash) { src_nents = sg_nents_for_len(req->src, req->nbytes - (*next_buflen)); + if (src_nents < 0) { + dev_err(jrdev, "Invalid number of src SG.\n"); + return src_nents; + } sec4_sg_src_index = 1 + (*buflen ? 1 : 0); sec4_sg_bytes = (sec4_sg_src_index + src_nents) * sizeof(struct sec4_sg_entry); @@ -1002,6 +1006,10 @@ static int ahash_finup_ctx(struct ahash_request *req) int sh_len; src_nents = sg_nents_for_len(req->src, req->nbytes); + if (src_nents < 0) { + dev_err(jrdev, "Invalid number of src SG.\n"); + return src_nents; + } sec4_sg_src_index = 1 + (buflen ? 1 : 0); sec4_sg_bytes = (sec4_sg_src_index + src_nents) * sizeof(struct sec4_sg_entry); @@ -1086,6 +1094,10 @@ static int ahash_digest(struct ahash_request *req) int sh_len; src_nents = sg_count(req->src, req->nbytes); + if (src_nents < 0) { + dev_err(jrdev, "Invalid number of src SG.\n"); + return src_nents; + } dma_map_sg(jrdev, req->src, src_nents ? : 1, DMA_TO_DEVICE); sec4_sg_bytes = src_nents * sizeof(struct sec4_sg_entry); @@ -1234,6 +1246,10 @@ static int ahash_update_no_ctx(struct ahash_request *req) if (to_hash) { src_nents = sg_nents_for_len(req->src, req->nbytes - (*next_buflen)); + if (src_nents < 0) { + dev_err(jrdev, "Invalid number of src SG.\n"); + return src_nents; + } sec4_sg_bytes = (1 + src_nents) * sizeof(struct sec4_sg_entry); @@ -1342,6 +1358,10 @@ static int ahash_finup_no_ctx(struct ahash_request *req) int ret = 0; src_nents = sg_nents_for_len(req->src, req->nbytes); + if (src_nents < 0) { + dev_err(jrdev, "Invalid number of src SG.\n"); + return src_nents; + } sec4_sg_src_index = 2; sec4_sg_bytes = (sec4_sg_src_index + src_nents) * sizeof(struct sec4_sg_entry); @@ -1430,6 +1450,10 @@ static int ahash_update_first(struct ahash_request *req) if (to_hash) { src_nents = sg_count(req->src, req->nbytes - (*next_buflen)); + if (src_nents < 0) { + dev_err(jrdev, "Invalid number of src SG.\n"); + return src_nents; + } dma_map_sg(jrdev, req->src, src_nents ? : 1, DMA_TO_DEVICE); sec4_sg_bytes = src_nents * sizeof(struct sec4_sg_entry); |