[IPV6]: Fix crash in ip6_del_rt
ip6_null_entry doesn't have rt6i_table set, when trying to delete it the
kernel crashes dereferencing table->tb6_lock.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index ff5affe..41c5905 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1223,6 +1223,9 @@
int err;
struct fib6_table *table;
+ if (rt == &ip6_null_entry)
+ return -ENOENT;
+
table = rt->rt6i_table;
write_lock_bh(&table->tb6_lock);