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crypto: ahash - ensure statesize is non-zero
[firefly-linux-kernel-4.4.55.git]
/
crypto
/
ahash.c
diff --git
a/crypto/ahash.c
b/crypto/ahash.c
index 8acb886032ae7a604fe0e965eb5d3ce07dd4845b..9c1dc8d6106a89a0f853271c1dfc49cd301ec983 100644
(file)
--- a/
crypto/ahash.c
+++ b/
crypto/ahash.c
@@
-544,7
+544,8
@@
static int ahash_prepare_alg(struct ahash_alg *alg)
struct crypto_alg *base = &alg->halg.base;
if (alg->halg.digestsize > PAGE_SIZE / 8 ||
- alg->halg.statesize > PAGE_SIZE / 8)
+ alg->halg.statesize > PAGE_SIZE / 8 ||
+ alg->halg.statesize == 0)
return -EINVAL;
base->cra_type = &crypto_ahash_type;