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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>
This commit is contained in:
LABBE Corentin 2015-11-04 21:13:38 +01:00 committed by Herbert Xu
parent f051f95eb4
commit f9970c2865
1 changed files with 24 additions and 0 deletions
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24
drivers/crypto/caam/caamhash.c
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@ -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);