From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Alexander Lobakin <alobakin@pm.me>,
Jakub Kicinski <kuba@kernel.org>, Sasha Levin <sashal@kernel.org>,
netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 029/130] net: skb_vlan_untag(): don't reset transport offset if set by GRO layer
Date: Tue, 22 Dec 2020 21:16:32 -0500 [thread overview]
Message-ID: <20201223021813.2791612-29-sashal@kernel.org> (raw)
In-Reply-To: <20201223021813.2791612-1-sashal@kernel.org>
From: Alexander Lobakin <alobakin@pm.me>
[ Upstream commit 8be33ecfc1ffd2da20cc29e957e4cb6eb99310cb ]
Similar to commit fda55eca5a33f
("net: introduce skb_transport_header_was_set()"), avoid resetting
transport offsets that were already set by GRO layer. This not only
mirrors the behavior of __netif_receive_skb_core(), but also makes
sense when it comes to UDP GSO fraglists forwarding: transport offset
of such skbs is set only once by GRO receive callback and remains
untouched and correct up to the xmitting driver in 1:1 case, but
becomes junk after untagging in ingress VLAN case and breaks UDP
GSO offload. This does not happen after this change, and all types
of forwarding of UDP GSO fraglists work as expected.
Since v1 [1]:
- keep the code 1:1 with __netif_receive_skb_core() (Jakub).
[1] https://lore.kernel.org/netdev/zYurwsZRN7BkqSoikWQLVqHyxz18h4LhHU4NFa2Vw@cp4-web-038.plabs.ch
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Link: https://lore.kernel.org/r/7JgIkgEztzt0W6ZtC9V9Cnk5qfkrUFYcpN871syCi8@cp4-web-040.plabs.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/core/skbuff.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index a0486dcf5425b..5f9035f462445 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -5333,7 +5333,8 @@ struct sk_buff *skb_vlan_untag(struct sk_buff *skb)
goto err_free;
skb_reset_network_header(skb);
- skb_reset_transport_header(skb);
+ if (!skb_transport_header_was_set(skb))
+ skb_reset_transport_header(skb);
skb_reset_mac_len(skb);
return skb;
--
2.27.0
next prev parent reply other threads:[~2020-12-23 3:04 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20201223021813.2791612-1-sashal@kernel.org>
2020-12-23 2:16 ` [PATCH AUTOSEL 5.4 008/130] staging: wimax: depends on NET Sasha Levin
2020-12-23 7:29 ` Greg Kroah-Hartman
2020-12-23 14:15 ` Sasha Levin
2020-12-23 2:16 ` [PATCH AUTOSEL 5.4 015/130] mac80211: don't overwrite QoS TID of injected frames Sasha Levin
2020-12-23 2:16 ` [PATCH AUTOSEL 5.4 023/130] rsi: Fix TX EAPOL packet handling against iwlwifi AP Sasha Levin
2020-12-23 2:16 ` [PATCH AUTOSEL 5.4 027/130] Bluetooth: hidp: use correct wait queue when removing ctrl_wait Sasha Levin
2020-12-23 2:16 ` Sasha Levin [this message]
2020-12-23 2:16 ` [PATCH AUTOSEL 5.4 031/130] mwifiex: pcie: skip cancel_work_sync() on reset failure path Sasha Levin
2020-12-23 2:16 ` [PATCH AUTOSEL 5.4 034/130] net: ipconfig: Avoid spurious blank lines in boot log Sasha Levin
2020-12-23 2:16 ` [PATCH AUTOSEL 5.4 036/130] r8169: use READ_ONCE in rtl_tx_slots_avail Sasha Levin
2020-12-23 2:16 ` [PATCH AUTOSEL 5.4 052/130] net: dsa: avoid potential use-after-free error Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 058/130] rxrpc: Don't leak the service-side session key to userspace Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 060/130] rtw88: coex: change the decode method from firmware Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 067/130] brcmsmac: ampdu: Check BA window size before checking block ack Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 068/130] i40e: report correct VF link speed when link state is set to enable Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 069/130] hv_netvsc: Validate number of allocated sub-channels Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 075/130] net/lapb: fix t1 timer handling for LAPB_STATE_0 Sasha Levin
2020-12-23 17:01 ` Xie He
2020-12-24 9:49 ` Xie He
2020-12-27 21:27 ` Sasha Levin
2021-01-06 7:33 ` Martin Schiller
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 081/130] bridge: switchdev: Notify about VLAN protocol changes Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 094/130] mwifiex: Fix possible buffer overflows in mwifiex_cmd_802_11_ad_hoc_start Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 097/130] rtlwifi: rtl8192de: fix ofdm power compensation Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 106/130] iwlwifi: avoid endless HW errors at assert time Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 107/130] iwlwifi: validate MPDU length against notification length Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 108/130] iwlwifi: pcie: validate RX descriptor length Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 109/130] iwlwifi: mvm: fix 22000 series driver NMI Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 110/130] iwlwifi: trans: consider firmware dead after errors Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 111/130] iwlwifi: mvm: validate firmware sync response size Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 112/130] iwlwifi: add an extra firmware state in the transport Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 113/130] iwlwifi: mvm: disconnect if channel switch delay is too long Sasha Levin
2020-12-23 2:17 ` [PATCH AUTOSEL 5.4 116/130] cfg80211: Update TSF and TSF BSSID for multi BSS Sasha Levin
2020-12-23 2:18 ` [PATCH AUTOSEL 5.4 117/130] nl80211: always accept scan request with the duration set Sasha Levin
2020-12-23 2:18 ` [PATCH AUTOSEL 5.4 118/130] cfg80211: Save the regulatory domain when setting custom regulatory Sasha Levin
2020-12-23 2:18 ` [PATCH AUTOSEL 5.4 119/130] mac80211: disallow band-switch during CSA Sasha Levin
2020-12-23 2:18 ` [PATCH AUTOSEL 5.4 120/130] mac80211: support Rx timestamp calculation for all preamble types Sasha Levin
2020-12-23 2:18 ` [PATCH AUTOSEL 5.4 121/130] mac80211: use bitfield helpers for BA session action frames Sasha Levin
2020-12-23 2:18 ` [PATCH AUTOSEL 5.4 122/130] mac80211: ignore country element TX power on 6 GHz Sasha Levin
2020-12-23 2:18 ` [PATCH AUTOSEL 5.4 123/130] mac80211: Fix calculation of minimal channel width Sasha Levin
2020-12-23 2:18 ` [PATCH AUTOSEL 5.4 124/130] mac80211: don't filter out beacons once we start CSA Sasha Levin
2020-12-23 2:18 ` [PATCH AUTOSEL 5.4 125/130] mac80211: Update rate control on channel change Sasha Levin
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