diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-11 17:15:28 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-07-13 12:56:49 +0100 |
| commit | 1ebcb25ad6fc3d50fca87350acf451b9a66dd31e (patch) | |
| tree | ae0874875b30a43f48360b5ebc29c7a1c679728e | |
| parent | 2a4eb714841f288cf51c7d942d98af6a8c6e4b01 (diff) | |
icmp: Fix a data-race around sysctl_icmp_ratemask.
While reading sysctl_icmp_ratemask, 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>
| -rw-r--r-- | net/ipv4/icmp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 1d454cc41713..57c4f0d87a7a 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -282,7 +282,7 @@ static bool icmpv4_mask_allow(struct net *net, int type, int code) return true; /* Limit if icmp type is enabled in ratemask. */ - if (!((1 << type) & net->ipv4.sysctl_icmp_ratemask)) + if (!((1 << type) & READ_ONCE(net->ipv4.sysctl_icmp_ratemask))) return true; return false; |