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c0cb86e1d5
Rather than using the clunky, old, slower wireguard-linux-compat out of tree module, this commit does a patch-by-patch backport of upstream's wireguard to 5.4. This specific backport is in widespread use, being part of SUSE's enterprise kernel, Oracle's enterprise kernel, Google's Android kernel, Gentoo's distro kernel, and probably more I've forgotten about. It's definately the "more proper" way of adding wireguard to a kernel than the ugly compat.h hell of the wireguard-linux-compat repo. And most importantly for OpenWRT, it allows using the same module configuration code for 5.10 as for 5.4, with no need for bifurcation. These patches are from the backport tree which is maintained in the open here: https://git.zx2c4.com/wireguard-linux/log/?h=backport-5.4.y I'll be sending PRs to update this as needed. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> (cherry picked from commit3888fa7880) (cherry picked from commitd540725871) (cherry picked from commit196f3d586f) (cherry picked from commit3500fd7938) (cherry picked from commit23b801d3ba) (cherry picked from commit0c0cb97da7) (cherry picked from commit2a27f6f90a) Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
48 lines
1.6 KiB
Diff
48 lines
1.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
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Date: Mon, 22 Feb 2021 17:25:47 +0100
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Subject: [PATCH] wireguard: device: do not generate ICMP for non-IP packets
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commit 99fff5264e7ab06f45b0ad60243475be0a8d0559 upstream.
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If skb->protocol doesn't match the actual skb->data header, it's
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probably not a good idea to pass it off to icmp{,v6}_ndo_send, which is
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expecting to reply to a valid IP packet. So this commit has that early
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mismatch case jump to a later error label.
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Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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---
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drivers/net/wireguard/device.c | 7 ++++---
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1 file changed, 4 insertions(+), 3 deletions(-)
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--- a/drivers/net/wireguard/device.c
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+++ b/drivers/net/wireguard/device.c
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@@ -138,7 +138,7 @@ static netdev_tx_t wg_xmit(struct sk_buf
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else if (skb->protocol == htons(ETH_P_IPV6))
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net_dbg_ratelimited("%s: No peer has allowed IPs matching %pI6\n",
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dev->name, &ipv6_hdr(skb)->daddr);
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- goto err;
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+ goto err_icmp;
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}
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family = READ_ONCE(peer->endpoint.addr.sa_family);
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@@ -201,12 +201,13 @@ static netdev_tx_t wg_xmit(struct sk_buf
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err_peer:
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wg_peer_put(peer);
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-err:
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- ++dev->stats.tx_errors;
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+err_icmp:
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if (skb->protocol == htons(ETH_P_IP))
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icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0);
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else if (skb->protocol == htons(ETH_P_IPV6))
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icmpv6_ndo_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0);
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+err:
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+ ++dev->stats.tx_errors;
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kfree_skb(skb);
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return ret;
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}
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