cifs: Fix smbencrypt() to stop pointing a scatterlist at the stack

smbencrypt() points a scatterlist to the stack, which is breaks if
CONFIG_VMAP_STACK=y.

Fix it by switching to crypto_cipher_encrypt_one().  The new code
should be considerably faster as an added benefit.

This code is nearly identical to some code that Eric Biggers
suggested.

Cc: stable@vger.kernel.org # 4.9 only
Reported-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/trafgen_parser.y b/trafgen_parser.y
index 0801c24..1cc541e 100644
--- a/trafgen_parser.y
+++ b/trafgen_parser.y
@@ -334,8 +334,7 @@ static void set_dynamic_incdec(uint8_t start, uint8_t stop, uint8_t stepping,
 
 static void proto_add(enum proto_id pid)
 {
-	proto_header_init(pid);
-	hdr = proto_current_header();
+	hdr = proto_header_init(pid);
 }
 
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