crypto: asymmetric_keys - set error code on failure

In function public_key_verify_signature(), returns variable ret on
error paths. When the call to kmalloc() fails, the value of ret is 0,
and it is not set to an errno before returning. This patch fixes the
bug.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188891

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index fd76b5fc3b3abe1919f193342108d87e8f1c0a93..d3a989e718f53518bafe93ddb9efea419e5d9b30 100644 (file)
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -121,6 +121,7 @@ int public_key_verify_signature(const struct public_key *pkey,
        if (ret)
                goto error_free_req;
 
+       ret = -ENOMEM;
        outlen = crypto_akcipher_maxsize(tfm);
        output = kmalloc(outlen, GFP_KERNEL);
        if (!output)