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@xxxxxxxxx> --- drivers/crypto/caam/caamhash.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index 9609f66..b894ce3 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -794,6 +794,10 @@ 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); @@ -993,6 +997,10 @@ 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); @@ -1077,6 +1085,10 @@ 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); @@ -1225,6 +1237,10 @@ 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); @@ -1333,6 +1349,10 @@ 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); @@ -1421,6 +1441,10 @@ 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); -- 2.4.10 -- 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