crypto: ahash - ensure statesize is non-zero

[uclinux-h8/linux.git] / crypto / ahash.c

diff --git a/crypto/ahash.c b/crypto/ahash.c
index 8acb886..9c1dc8d 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;