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196f3d586f
5.4.102 backported a lot of stuff that our WireGuard backport already did, in addition to other patches we had, so those patches were removed from that part of the series. In the process other patches were refreshed or reworked to account for upstream changes. This commit involved `update_kernel.sh -v -u 5.4`. Cc: John Audia <graysky@archlinux.us> Cc: David Bauer <mail@david-bauer.net> Cc: Petr Štetiar <ynezz@true.cz> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.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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