NFC: llcp: Detach socket from process context only when releasing the socket

Calling sock_orphan when e.g. the NFC adapter is removed can lead to
kernel crashes when e.g. a connection less client is sleeping on the
Rx workqueue, waiting for data to show up.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index b530afa..336813f 100644 (file)
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -107,8 +107,6 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen,
                                accept_sk->sk_state_change(sk);
 
                                bh_unlock_sock(accept_sk);
-
-                               sock_orphan(accept_sk);
                        }
 
                        if (listen == true) {
@@ -134,8 +132,6 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen,
 
                bh_unlock_sock(sk);
 
-               sock_orphan(sk);
-
                sk_del_node_init(sk);
        }
 
@@ -164,8 +160,6 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen,
 
                bh_unlock_sock(sk);
 
-               sock_orphan(sk);
-
                sk_del_node_init(sk);
        }
 

diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index 5c7cdf3..e488e44 100644 (file)
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -464,8 +464,6 @@ static int llcp_sock_release(struct socket *sock)
                        nfc_llcp_accept_unlink(accept_sk);
 
                        release_sock(accept_sk);
-
-                       sock_orphan(accept_sk);
                }
        }