4.3-stable review patch. If anyone has any objections, please let me know.
------------------ From: Andrey Ryabinin <[email protected]> [ Upstream commit e459dfeeb64008b2d23bdf600f03b3605dbb8152 ] 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: 2a8cc6c89039 ("[IPV6] ADDRCONF: Support RFC3484 configurable address selection policy table.") Signed-off-by: Andrey Ryabinin <[email protected]> Reviewed-by: Cong Wang <[email protected]> Acked-by: YOSHIFUJI Hideaki <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/ipv6/addrlabel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/ipv6/addrlabel.c +++ b/net/ipv6/addrlabel.c @@ -552,7 +552,7 @@ static int ip6addrlbl_get(struct sk_buff 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();
