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[IrDA]: Correctly handling socket error

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This patch fixes an oops first reported in mid 2006 - see
http://lkml.org/lkml/2006/8/29/358 The cause of this bug report is that
when an error is signalled on the socket, irda_recvmsg_stream returns
without removing a local wait_queue variable from the socket's sk_sleep
queue. This causes havoc further down the road.

In response to this problem, a patch was made that invoked sock_orphan on
the socket when receiving a disconnect indication. This is not a good fix,
as this sets sk_sleep to NULL, causing applications sleeping in recvmsg
(and other places) to oops.

This is against the latest net-2.6 and should be considered for -stable
inclusion. 

Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Olaf Kirch 2007-04-18 15:07:22 -07:00 committed by David S. Miller
parent d0cf0d9940
commit bfb6709d0b
1 changed files with 1 additions and 2 deletions
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3
net/irda/af_irda.c
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@ -138,7 +138,6 @@ static void irda_disconnect_indication(void *instance, void *sap,
sk->sk_shutdown |= SEND_SHUTDOWN;
sk->sk_state_change(sk);
sock_orphan(sk);
release_sock(sk);
/* Close our TSAP.
@ -1446,7 +1445,7 @@ static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
*/
ret = sock_error(sk);
if (ret)
break;
;
else if (sk->sk_shutdown & RCV_SHUTDOWN)
;
else if (noblock)