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[ROSE/AX25] af_rose: rose_release() fix 

rose_release() doesn't release sockets properly, e.g. it skips
sock_orphan(), so OOPSes are triggered in sock_def_write_space(),
which was observed especially while ROSE skbs were kfreed from
ax25_frames_acked(). There is also sock_hold() and lock_sock() added -
similarly to ax25_release(). Thanks to Bernard Pidoux for substantial
help in debugging this problem.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Reported-and-tested-by: Bernard Pidoux <bpidoux@free.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jarek Poplawski 2008-04-01 23:56:17 -07:00 committed by David S. Miller
parent d43c7b37ad
commit 4965291acf
1 changed files with 9 additions and 0 deletions
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9
net/rose/af_rose.c
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@ -598,17 +598,24 @@ static int rose_release(struct socket *sock)
if (sk == NULL) return 0;
sock_hold(sk);
sock_orphan(sk);
lock_sock(sk);
rose = rose_sk(sk);
switch (rose->state) {
case ROSE_STATE_0:
release_sock(sk);
rose_disconnect(sk, 0, -1, -1);
lock_sock(sk);
rose_destroy_socket(sk);
break;
case ROSE_STATE_2:
rose->neighbour->use--;
release_sock(sk);
rose_disconnect(sk, 0, -1, -1);
lock_sock(sk);
rose_destroy_socket(sk);
break;
@ -633,6 +640,8 @@ static int rose_release(struct socket *sock)
}
sock->sk = NULL;
release_sock(sk);
sock_put(sk);
return 0;
}