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authorKuniyuki Iwashima <kuniyu@amazon.com>2022-07-12 03:15:22 +0300
committerDavid S. Miller <davem@davemloft.net>2022-07-13 14:56:49 +0300
commitbb7bb35a63b4812da8e3aff587773678e31d23e3 (patch)
treeb8c56bd45f808e96350e05003d3c72a11a41962e /net/ipv4/sysctl_net_ipv4.c
parent6f605b57f3782114e330e108ce1903ede22ec675 (diff)
downloadlinux-bb7bb35a63b4812da8e3aff587773678e31d23e3.tar.xz
icmp: Fix a data-race around sysctl_icmp_echo_ignore_all.
While reading sysctl_icmp_echo_ignore_all, 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/sysctl_net_ipv4.c')
-rw-r--r--net/ipv4/sysctl_net_ipv4.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index cd448cdd3b38..64682a01914a 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -599,6 +599,8 @@ static struct ctl_table ipv4_net_table[] = {
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dou8vec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE
},
{
.procname = "icmp_echo_enable_probe",