From 18943d292facbc70e6a36fc62399ae833f64671b Mon Sep 17 00:00:00 2001
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Mon, 8 Nov 2010 11:15:54 +0000
Subject: [PATCH] inet: fix ip_mc_drop_socket()
commit 8723e1b4ad9be4444 (inet: RCU changes in inetdev_by_index())
forgot one call site in ip_mc_drop_socket()
We should not decrease idev refcount after inetdev_by_index() call,
since refcount is not increased anymore.
Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Reported-by: Miles Lane <miles.lane@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/ipv4/igmp.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index c8877c6c72164c..3c53c2d89e3b47 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -2306,10 +2306,8 @@ void ip_mc_drop_socket(struct sock *sk)
in_dev = inetdev_by_index(net, iml->multi.imr_ifindex);
(void) ip_mc_leave_src(sk, iml, in_dev);
- if (in_dev != NULL) {
+ if (in_dev != NULL)
ip_mc_dec_group(in_dev, iml->multi.imr_multiaddr.s_addr);
- in_dev_put(in_dev);
- }
/* decrease mem now to avoid the memleak warning */
atomic_sub(sizeof(*iml), &sk->sk_omem_alloc);
call_rcu(&iml->rcu, ip_mc_socklist_reclaim);
--
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