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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>
This commit is contained in:
Vlad Yasevich 2007-07-03 12:47:40 -04:00 committed by David S. Miller
parent 3663c30660
commit f50f95cab7
1 changed files with 9 additions and 1 deletions
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10
net/sctp/socket.c
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@ -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. */