Commit e459dfee authored Dec 21, 2015 by Andrey Ryabinin Committed by David S. Miller Dec 22, 2015

ipv6/addrlabel: fix ip6addrlbl_get()

ip6addrlbl_get() has never worked. If ip6addrlbl_hold() succeeded,
ip6addrlbl_get() will exit with '-ESRCH'. If ip6addrlbl_hold() failed,
ip6addrlbl_get() will use about to be free ip6addrlbl_entry pointer.

Fix this by inverting ip6addrlbl_hold() check.

Fixes: 2a8cc6c8 ("[IPV6] ADDRCONF: Support RFC3484 configurable address selection policy table.")
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reviewed-by: Cong Wang <cwang@twopensource.com>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent ef9cdd0f

net/ipv6/addrlabel.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -552,7 +552,7 @@ static int ip6addrlbl_get(struct sk_buff in_skb, struct nlmsghdr nlh)

		rcu_read_lock();
		p = __ipv6_addr_label(net, addr, ipv6_addr_type(addr), ifal->ifal_index);
		if (p && ip6addrlbl_hold(p))
		if (p && !ip6addrlbl_hold(p))
		p = NULL;
		lseq = ip6addrlbl_table.seq;
		rcu_read_unlock();