TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

icmp: Fix a data-race around sysctl_icmp_ratelimit.

Browse Source 
[ Upstream commit 2a4eb71484 ]

While reading sysctl_icmp_ratelimit, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kuniyuki Iwashima
2022-07-11 17:15:27 -07:00
committed by Greg Kroah-Hartman
parent b8871d9186
commit 4ebf261532
1 changed files with 2 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
net/ipv4/icmp.c
+2 -1
View File
@@ -328,7 +328,8 @@ static bool icmpv4_xrlim_allow(struct net *net, struct rtable *rt,
vif = l3mdev_master_ifindex(dst->dev); vif = l3mdev_master_ifindex(dst->dev);
peer = inet_getpeer_v4(net->ipv4.peers, fl4->daddr, vif, 1); peer = inet_getpeer_v4(net->ipv4.peers, fl4->daddr, vif, 1);
rc = inet_peer_xrlim_allow(peer, net->ipv4.sysctl_icmp_ratelimit); rc = inet_peer_xrlim_allow(peer,
READ_ONCE(net->ipv4.sysctl_icmp_ratelimit));
if (peer) if (peer)
inet_putpeer(peer); inet_putpeer(peer);
out: out: