From f50f95cab735ebe2993e8d1549f0615bad05f3f2 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich <vladislav.yasevich@hp.com> Date: Tue, 3 Jul 2007 12:47:40 -0400 Subject: [PATCH] SCTP: Check to make sure file is valid before setting timeout In-kernel sockets created with sock_create_kern don't usually have a file and file descriptor allocated to them. As a result, when SCTP tries to check the non-blocking flag, we Oops when dereferencing a NULL file pointer. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net> --- net/sctp/socket.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 1e788279bb2..b1917f68723 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -980,6 +980,7 @@ static int __sctp_connect(struct sock* sk, union sctp_addr *sa_addr; void *addr_buf; unsigned short port; + unsigned int f_flags = 0; sp = sctp_sk(sk); ep = sp->ep; @@ -1106,7 +1107,14 @@ static int __sctp_connect(struct sock* sk, af->to_sk_daddr(&to, sk); sk->sk_err = 0; - timeo = sock_sndtimeo(sk, sk->sk_socket->file->f_flags & O_NONBLOCK); + /* in-kernel sockets don't generally have a file allocated to them + * if all they do is call sock_create_kern(). + */ + if (sk->sk_socket->file) + f_flags = sk->sk_socket->file->f_flags; + + timeo = sock_sndtimeo(sk, f_flags & O_NONBLOCK); + err = sctp_wait_for_connect(asoc, &timeo); /* Don't free association on exit. */ -- 2.20.1