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authorTom Parkin <tparkin@katalix.com>2013-03-19 06:11:18 +0000
committerDavid S. Miller <davem@davemloft.net>2013-03-20 12:10:39 -0400
commit02d13ed5f94af38c37d1abd53462fe48d78bcc9d (patch)
tree4685646061029ae3aba116410564cdad6da55e47 /net/l2tp
parent8abbbe8ff572fd84d1b98eb9acf30611a97cf72e (diff)
downloadlinux-02d13ed5f94af38c37d1abd53462fe48d78bcc9d.tar.gz
l2tp: don't BUG_ON sk_socket being NULL
It is valid for an existing struct sock object to have a NULL sk_socket pointer, so don't BUG_ON in l2tp_tunnel_del_work if that should occur. Signed-off-by: Tom Parkin <tparkin@katalix.com> Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l2tp')
-rw-r--r--net/l2tp/l2tp_core.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 45373fee38c..e841ef2a68a 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -1412,19 +1412,21 @@ static void l2tp_tunnel_del_work(struct work_struct *work)
return;
sock = sk->sk_socket;
- BUG_ON(!sock);
- /* If the tunnel socket was created directly by the kernel, use the
- * sk_* API to release the socket now. Otherwise go through the
- * inet_* layer to shut the socket down, and let userspace close it.
+ /* If the tunnel socket was created by userspace, then go through the
+ * inet layer to shut the socket down, and let userspace close it.
+ * Otherwise, if we created the socket directly within the kernel, use
+ * the sk API to release it here.
* In either case the tunnel resources are freed in the socket
* destructor when the tunnel socket goes away.
*/
- if (sock->file == NULL) {
- kernel_sock_shutdown(sock, SHUT_RDWR);
- sk_release_kernel(sk);
+ if (tunnel->fd >= 0) {
+ if (sock)
+ inet_shutdown(sock, 2);
} else {
- inet_shutdown(sock, 2);
+ if (sock)
+ kernel_sock_shutdown(sock, SHUT_RDWR);
+ sk_release_kernel(sk);
}
l2tp_tunnel_sock_put(sk);