icmp: Fix a data-race around sysctl_icmp_ratemask.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2149949


Upstream Status: linux.git

commit 1ebcb25a
Author: Kuniyuki Iwashima <kuniyu@amazon.com>
Date:   Mon Jul 11 17:15:28 2022 -0700

    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: 1da177e4 ("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: Guillaume Nault <gnault@redhat.com>