diff options
Diffstat (limited to 'crypto/digest.c')
| -rw-r--r-- | crypto/digest.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/crypto/digest.c b/crypto/digest.c index 8f4593268ce..bc47af648cb 100644 --- a/crypto/digest.c +++ b/crypto/digest.c @@ -14,7 +14,9 @@ #include <linux/mm.h> #include <linux/errno.h> +#include <linux/hardirq.h> #include <linux/highmem.h> +#include <linux/kernel.h> #include <linux/module.h> #include <linux/scatterlist.h> @@ -29,8 +31,8 @@ static int init(struct hash_desc *desc) return 0; } -static int update(struct hash_desc *desc, - struct scatterlist *sg, unsigned int nbytes) +static int update2(struct hash_desc *desc, + struct scatterlist *sg, unsigned int nbytes) { struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm); unsigned int alignmask = crypto_tfm_alg_alignmask(tfm); @@ -81,6 +83,14 @@ static int update(struct hash_desc *desc, return 0; } +static int update(struct hash_desc *desc, + struct scatterlist *sg, unsigned int nbytes) +{ + if (WARN_ON_ONCE(in_irq())) + return -EDEADLK; + return update2(desc, sg, nbytes); +} + static int final(struct hash_desc *desc, u8 *out) { struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm); @@ -118,8 +128,11 @@ static int setkey(struct crypto_hash *hash, const u8 *key, unsigned int keylen) static int digest(struct hash_desc *desc, struct scatterlist *sg, unsigned int nbytes, u8 *out) { + if (WARN_ON_ONCE(in_irq())) + return -EDEADLK; + init(desc); - update(desc, sg, nbytes); + update2(desc, sg, nbytes); return final(desc, out); } |