diff options
| author | Gao feng <gaofeng@cn.fujitsu.com> | 2011-09-11 15:36:05 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-10-03 11:40:51 -0700 |
| commit | cbab190c501c8034b82e0dd9da7fdb4b75e08daa (patch) | |
| tree | 906c1a75f88c366d3e85ab20caf6b4bb2acc238c /net/core | |
| parent | 5ee858c9ab53a4f6b12a095a4982793d4f417f56 (diff) | |
fib:fix BUG_ON in fib_nl_newrule when add new fib rule
[ Upstream commit 561dac2d410ffac0b57a23b85ae0a623c1a076ca ]
add new fib rule can cause BUG_ON happen
the reproduce shell is
ip rule add pref 38
ip rule add pref 38
ip rule add to 192.168.3.0/24 goto 38
ip rule del pref 38
ip rule add to 192.168.3.0/24 goto 38
ip rule add pref 38
then the BUG_ON will happen
del BUG_ON and use (ctarget == NULL) identify whether this rule is unresolved
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/fib_rules.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c index 008dc70b064b..f39ef5c6084b 100644 --- a/net/core/fib_rules.c +++ b/net/core/fib_rules.c @@ -384,8 +384,8 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) */ list_for_each_entry(r, &ops->rules_list, list) { if (r->action == FR_ACT_GOTO && - r->target == rule->pref) { - BUG_ON(rtnl_dereference(r->ctarget) != NULL); + r->target == rule->pref && + rtnl_dereference(r->ctarget) == NULL) { rcu_assign_pointer(r->ctarget, rule); if (--ops->unresolved_rules == 0) break; |