eCryptfs: initialize payload_len in keystore.c

commit fa5199648e273a5e3e80aca41c1eb53700438dc1 upstream.

This is meant to remove a compiler warning.  It should not make any
functional change.

payload_len should be initialized when it is passed to
write_tag_64_packet() as a pointer.  If that call fails, this function
should return early, and payload_len won't be used.

Signed-off-by: Simon Que <sque@chromium.org>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index 5ce56e7..848b303 100644 (file)
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -1152,7 +1152,7 @@ decrypt_pki_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok,
        struct ecryptfs_message *msg = NULL;
        char *auth_tok_sig;
        char *payload = NULL;
-       size_t payload_len;
+       size_t payload_len = 0;
        int rc;
 
        rc = ecryptfs_get_auth_tok_sig(&auth_tok_sig, auth_tok);