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| author | Li Wei <lw@cn.fujitsu.com> | 2012-03-07 14:58:07 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-03-11 15:57:11 -0700 |
| commit | 8b2aaedee4eaa94e816144ed54b9707b96be29f8 (patch) | |
| tree | 0fd46f2b7fdfd5aacda2c35470048dfe2fb00dab /net | |
| parent | 7fbc415d7bd0ff0224eea53c678fa9f13f646b4f (diff) | |
| download | linux-stable-8b2aaedee4eaa94e816144ed54b9707b96be29f8.tar.gz linux-stable-8b2aaedee4eaa94e816144ed54b9707b96be29f8.tar.bz2 linux-stable-8b2aaedee4eaa94e816144ed54b9707b96be29f8.zip | |
ipv6: Fix Smatch warning.
With commit d6ddef9e641d(IPv6: Fix not join all-router mcast group
when forwarding set.) I check 'dev' after it's dereference that
leads to a Smatch complaint:
net/ipv6/addrconf.c:438 ipv6_add_dev()
warn: variable dereferenced before check 'dev' (see line 432)
net/ipv6/addrconf.c
431 /* protected by rtnl_lock */
432 rcu_assign_pointer(dev->ip6_ptr, ndev);
^^^^^^^^^^^^
Old dereference.
433
434 /* Join all-node multicast group */
435 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
436
437 /* Join all-router multicast group if forwarding is set
*/
438 if (ndev->cnf.forwarding && dev && (dev->flags &
IFF_MULTICAST))
^^^
Remove the check to avoid the complaint as 'dev' can't be NULL.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Li Wei <lw@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/addrconf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 6b8ebc5da0e1..6a3bb6077e19 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -435,7 +435,7 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev) ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes); /* Join all-router multicast group if forwarding is set */ - if (ndev->cnf.forwarding && dev && (dev->flags & IFF_MULTICAST)) + if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST)) ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters); return ndev; |