Commit 7348616e authored by Eric Biggers's avatar Eric Biggers Committed by Greg Kroah-Hartman

crypto: hmac - fix memory leak in hmac_init_tfm()

[ Upstream commit 7829a0c1 ]

When I added the sanity check of 'descsize', I missed that the child
hash tfm needs to be freed if the sanity check fails.  Of course this
should never happen, hence the use of WARN_ON(), but it should be fixed.

Fixes: e1354400 ("crypto: hash - fix incorrect HASH_MAX_DESCSIZE")
Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 62e5faca
......@@ -168,8 +168,10 @@ 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))
if (WARN_ON(parent->descsize > HASH_MAX_DESCSIZE)) {
crypto_free_shash(hash);
return -EINVAL;
}
ctx->hash = hash;
return 0;
......
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