From: Kuniyuki Iwashima kuniyu@amazon.com
[ Upstream commit 1ebcb25ad6fc3d50fca87350acf451b9a66dd31e ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv4/icmp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 41efb7381859..c13ceda9ce5d 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;