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authorGao feng <gaofeng@cn.fujitsu.com>2011-09-11 15:36:05 +0000
committerDavid S. Miller <davem@davemloft.net>2011-09-21 15:16:40 -0400
commit561dac2d410ffac0b57a23b85ae0a623c1a076ca (patch)
tree5cdb1bf0e346f29f232b7b7fb9cf24211141502e /net
parentb811ce9104a7f7663ddae4f7795a194a103b8f90 (diff)
downloadlinux-sh-561dac2d410ffac0b57a23b85ae0a623c1a076ca.tar.gz
fib:fix BUG_ON in fib_nl_newrule when add new fib rule
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>
Diffstat (limited to 'net')
-rw-r--r--net/core/fib_rules.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index e7ab0c0285b5..3231b468bb72 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;