niansa-misc/linux
1
0
Fork 0
mirror of synced 2025-03-06 20:59:54 +01:00
Code Issues Projects Releases Packages Wiki Activity

ipv4: use RCU protection in rt_is_expired()

Browse source 
rt_is_expired() must use RCU protection to make
sure the net structure it reads does not disappear.

Fixes: e84f84f276 ("netns: place rt_genid into struct net")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250205155120.1676781-6-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2025-02-05 15:51:13 +00:00 • committed by Jakub Kicinski
parent 71b8471c93
commit dd205fcc33
1 changed files with 7 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
net/ipv4/route.c
View file

@ -390,7 +390,13 @@ static inline int ip_rt_proc_init(void)
static inline bool rt_is_expired(const struct rtable *rth)
{
return rth->rt_genid != rt_genid_ipv4(dev_net(rth->dst.dev));
bool res;
rcu_read_lock();
res = rth->rt_genid != rt_genid_ipv4(dev_net_rcu(rth->dst.dev));
rcu_read_unlock();
return res;
}
void rt_cache_flush(struct net *net)