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crypto: sahara - 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 21:13:35 +01:00 committed by Herbert Xu
parent 8e409fe106
commit 6c2b74d477
1 changed files with 12 additions and 0 deletions
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12
drivers/crypto/sahara.c
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@ -477,7 +477,15 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev)
}
dev->nb_in_sg = sg_nents_for_len(dev->in_sg, dev->total);
if (dev->nb_in_sg < 0) {
dev_err(dev->device, "Invalid numbers of src SG.\n");
return dev->nb_in_sg;
}
dev->nb_out_sg = sg_nents_for_len(dev->out_sg, dev->total);
if (dev->nb_out_sg < 0) {
dev_err(dev->device, "Invalid numbers of dst SG.\n");
return dev->nb_out_sg;
}
if ((dev->nb_in_sg + dev->nb_out_sg) > SAHARA_MAX_HW_LINK) {
dev_err(dev->device, "not enough hw links (%d)\n",
dev->nb_in_sg + dev->nb_out_sg);
@ -793,6 +801,10 @@ static int sahara_sha_hw_links_create(struct sahara_dev *dev,
dev->in_sg = rctx->in_sg;
dev->nb_in_sg = sg_nents_for_len(dev->in_sg, rctx->total);
if (dev->nb_in_sg < 0) {
dev_err(dev->device, "Invalid numbers of src SG.\n");
return dev->nb_in_sg;
}
if ((dev->nb_in_sg) > SAHARA_MAX_HW_LINK) {
dev_err(dev->device, "not enough hw links (%d)\n",
dev->nb_in_sg + dev->nb_out_sg);