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| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-11 17:15:23 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-21 21:24:26 +0200 |
| commit | cce955efa0ab81f7fb72e22beed372054c86005c (patch) | |
| tree | a45362b38a05178b83e18c62c45739d7dd9f7258 /net/ipv6 | |
| parent | a716a3846c5ff32982ab1cc1ab27592221621958 (diff) | |
| download | linux-stable-cce955efa0ab81f7fb72e22beed372054c86005c.tar.gz linux-stable-cce955efa0ab81f7fb72e22beed372054c86005c.tar.bz2 linux-stable-cce955efa0ab81f7fb72e22beed372054c86005c.zip | |
icmp: Fix data-races around sysctl_icmp_echo_enable_probe.
[ Upstream commit 4a2f7083cc6cb72dade9a63699ca352fad26d1cd ]
While reading sysctl_icmp_echo_enable_probe, it can be changed
concurrently. Thus, we need to add READ_ONCE() to its readers.
Fixes: d329ea5bd884 ("icmp: add response to RFC 8335 PROBE messages")
Fixes: 1fd07f33c3ea ("ipv6: ICMPV6: add response to ICMPV6 RFC 8335 PROBE messages")
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>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/icmp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index 96c5cc0f30ce..716e7717fe8f 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -927,7 +927,7 @@ static int icmpv6_rcv(struct sk_buff *skb) break; case ICMPV6_EXT_ECHO_REQUEST: if (!net->ipv6.sysctl.icmpv6_echo_ignore_all && - net->ipv4.sysctl_icmp_echo_enable_probe) + READ_ONCE(net->ipv4.sysctl_icmp_echo_enable_probe)) icmpv6_echo_reply(skb); break; |