diff options
| author | Xin Long <lucien.xin@gmail.com> | 2022-01-22 06:40:56 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-02-01 17:24:37 +0100 |
| commit | ca5355771ca8871da2230722ce2f9a961d54ecf8 (patch) | |
| tree | 232cd8a2a6c685ec4ebb9cba21a84c72ce91cd22 | |
| parent | 0b567a24addc3082f0c1741f49792ba69edec796 (diff) | |
ping: fix the sk_bound_dev_if match in ping_lookup
commit 2afc3b5a31f9edf3ef0f374f5d70610c79c93a42 upstream.
When 'ping' changes to use PING socket instead of RAW socket by:
# sysctl -w net.ipv4.ping_group_range="0 100"
the selftests 'router_broadcast.sh' will fail, as such command
# ip vrf exec vrf-h1 ping -I veth0 198.51.100.255 -b
can't receive the response skb by the PING socket. It's caused by mismatch
of sk_bound_dev_if and dif in ping_rcv() when looking up the PING socket,
as dif is vrf-h1 if dif's master was set to vrf-h1.
This patch is to fix this regression by also checking the sk_bound_dev_if
against sdif so that the packets can stil be received even if the socket
is not bound to the vrf device but to the real iif.
Fixes: c319b4d76b9e ("net: ipv4: add IPPROTO_ICMP socket kind")
Reported-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | net/ipv4/ping.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index 1c3d5d3702a1..b0f51c7cc0d9 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -220,7 +220,8 @@ static struct sock *ping_lookup(struct net *net, struct sk_buff *skb, u16 ident) continue; } - if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) + if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif && + sk->sk_bound_dev_if != inet_sdif(skb)) continue; sock_hold(sk); |