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crypto: qce - 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.

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 21:13:36 +01:00 committed by Herbert Xu
parent 6c2b74d477
commit 4fa9948ca5
2 changed files with 13 additions and 0 deletions
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8
drivers/crypto/qce/ablkcipher.c
View File

@ -83,6 +83,14 @@ qce_ablkcipher_async_req_handle(struct crypto_async_request *async_req)
rctx->dst_nents = sg_nents_for_len(req->dst, req->nbytes);
else
rctx->dst_nents = rctx->src_nents;
if (rctx->src_nents < 0) {
dev_err(qce->dev, "Invalid numbers of src SG.\n");
return rctx->src_nents;
}
if (rctx->dst_nents < 0) {
dev_err(qce->dev, "Invalid numbers of dst SG.\n");
return -rctx->dst_nents;
}
rctx->dst_nents += 1;

5
drivers/crypto/qce/sha.c
View File

@ -92,6 +92,11 @@ static int qce_ahash_async_req_handle(struct crypto_async_request *async_req)
}
rctx->src_nents = sg_nents_for_len(req->src, req->nbytes);
if (rctx->src_nents < 0) {
dev_err(qce->dev, "Invalid numbers of src SG.\n");
return rctx->src_nents;
}
ret = dma_map_sg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE);
if (ret < 0)
return ret;