crypto: ccp - Fix oops by properly managing allocated structures

commit 25e44338321af545ab34243a6081c3f0fc6107d0 upstream.

A plaintext or ciphertext length of 0 is allowed in AES, in which case
no encryption occurs. Ensure that we don't clean up data structures
that were never allocated.

Fixes: 36cf515b9bbe2 ("crypto: ccp - Enable support for AES GCM on v5 CCPs")
Cc: <stable@vger.kernel.org>
Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c
index e212bad..43129a5 100644 (file)
--- a/drivers/crypto/ccp/ccp-ops.c
+++ b/drivers/crypto/ccp/ccp-ops.c
@@ -862,11 +862,11 @@ e_tag:
        ccp_dm_free(&final_wa);
 
 e_dst:
-       if (aes->src_len && !in_place)
+       if (ilen > 0 && !in_place)
                ccp_free_data(&dst, cmd_q);
 
 e_src:
-       if (aes->src_len)
+       if (ilen > 0)
                ccp_free_data(&src, cmd_q);
 
 e_aad: