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| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-12 02:15:27 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-07-13 13:56:49 +0200 |
| commit | 2a4eb714841f288cf51c7d942d98af6a8c6e4b01 (patch) | |
| tree | 622ad5a10899f28d3d2a2957f909b31e9ee58f70 /net/ipv4/icmp.c | |
| parent | icmp: Fix a data-race around sysctl_icmp_errors_use_inbound_ifaddr. (diff) | |
| download | linux-2a4eb714841f288cf51c7d942d98af6a8c6e4b01.tar.xz linux-2a4eb714841f288cf51c7d942d98af6a8c6e4b01.zip | |
icmp: Fix a data-race around sysctl_icmp_ratelimit.
While reading sysctl_icmp_ratelimit, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/icmp.c')
| -rw-r--r-- | net/ipv4/icmp.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index a49b68d6b969..1d454cc41713 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -320,7 +320,8 @@ static bool icmpv4_xrlim_allow(struct net *net, struct rtable *rt, vif = l3mdev_master_ifindex(dst->dev); 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) inet_putpeer(peer); out: |