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-rw-r--r--crypto/hmac.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/crypto/hmac.c b/crypto/hmac.c
index a68c1266121f..ac8c611ee33e 100644
--- a/crypto/hmac.c
+++ b/crypto/hmac.c
@@ -157,6 +157,10 @@ static int hmac_init_tfm(struct crypto_tfm *tfm)
parent->descsize = sizeof(struct shash_desc) +
crypto_shash_descsize(hash);
+ if (WARN_ON(parent->descsize > HASH_MAX_DESCSIZE)) {
+ crypto_free_shash(hash);
+ return -EINVAL;
+ }
ctx->hash = hash;
return 0;