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| author | LABBE Corentin <clabbe.montjoie@gmail.com> | 2015-11-04 21:13:35 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-11-17 22:00:36 +0800 |
| commit | 6c2b74d4774f36ea23f9cc8bb1401c1215fcd671 (patch) | |
| tree | 12afd308fe7625f53dc6cafc768913e17ff44cb3 /drivers/crypto/sahara.c | |
| parent | 8e409fe10695cb9729a8bdfa49b0af435b5ec89f (diff) | |
| download | linux-6c2b74d4774f36ea23f9cc8bb1401c1215fcd671.tar.gz linux-6c2b74d4774f36ea23f9cc8bb1401c1215fcd671.tar.bz2 linux-6c2b74d4774f36ea23f9cc8bb1401c1215fcd671.zip | |
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>
Diffstat (limited to 'drivers/crypto/sahara.c')
| -rw-r--r-- | drivers/crypto/sahara.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c index f68c24a98277..ea9f56a40d5a 100644 --- a/drivers/crypto/sahara.c +++ b/drivers/crypto/sahara.c @@ -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); |