nfc: llcp: nullify llcp_sock->dev on connect() error paths

Nullify the llcp_sock->dev on llcp_sock_connect() error paths,
symmetrically to the code llcp_sock_bind().  The non-NULL value of
llcp_sock->dev is used in a few places to check whether the socket is
still valid.

There was no particular issue observed with missing NULL assignment in
connect() error path, however a similar case - in the bind() error path
- was triggereable.  That one was fixed in commit 4ac06a1e013c ("nfc:
fix NULL ptr dereference in llcp_sock_getname() after failed connect"),
so the change here seems logical as well.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c
index 0b93a17..e92440c 100644 (file)
--- a/net/nfc/llcp_sock.c
+++ b/net/nfc/llcp_sock.c
@@ -764,6 +764,7 @@ sock_llcp_release:
        llcp_sock->local = NULL;
 
 put_dev:
+       llcp_sock->dev = NULL;
        nfc_put_device(dev);
 
 error: