mirror of
https://github.com/torvalds/linux
synced 2024-09-06 09:51:23 +00:00
[NETNS]: The ip6_fib_timer can work with garbage on net namespace stop.
The del_timer() function doesn't guarantee, that the timer callback is not active by the time it exits. Thus, the fib6_net_exit() may kfree() all the data, that is required by the fib6_run_gc(). The race window is tiny, but slab poisoning can trigger this bug. Using del_timer_sync() will cure this. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
f25c3d613b
commit
2aed2827df
|
@ -1543,7 +1543,7 @@ static int fib6_net_init(struct net *net)
|
|||
static void fib6_net_exit(struct net *net)
|
||||
{
|
||||
rt6_ifdown(net, NULL);
|
||||
del_timer(net->ipv6.ip6_fib_timer);
|
||||
del_timer_sync(net->ipv6.ip6_fib_timer);
|
||||
kfree(net->ipv6.ip6_fib_timer);
|
||||
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
|
||||
kfree(net->ipv6.fib6_local_tbl);
|
||||
|
|
Loading…
Reference in a new issue