From: patchwork-bot+netdevbpf@kernel.org
To: dongchenchen (A) <dongchenchen2@huawei.com>
Cc: pablo@netfilter.org, laforge@gnumonks.org, andrew+netdev@lunn.ch,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, horms@kernel.org, dsahern@kernel.org,
kees@kernel.org, netdev@vger.kernel.org,
zhangchangzhong@huawei.com,
syzbot+83181a31faf9455499c5@syzkaller.appspotmail.com
Subject: Re: [PATCH net v3] net: iptunnel: fix stale transport header during tunnel decapsulation
Date: Fri, 28 Aug 2026 23:10:13 +0000 [thread overview]
Message-ID: <178795861364.2836129.3831261202483160251.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260825123909.1463121-1-dongchenchen2@huawei.com>
Hello:
This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:
On Tue, 25 Aug 2026 20:39:09 +0800 you wrote:
> Syzbot reported a crash in qdisc_pkt_len_segs_init() caused by a stale
> transport_header offset after tunnel decapsulation.
>
> BUG: unable to handle page fault for address: ffffed102091a42e
> Oops: Oops: 0000 [#1] SMP KASAN NOPTI
> CPU: 0 UID: 0 PID: 340 Comm: qdisc_uaf_repro Not tainted 7.2.0-rc4-00061-g248951ddc14d #256 PREEMPT(full)
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
> RIP: 0010:__asan_load2
> <IRQ>
> qdisc_pkt_len_segs_init (net/core/dev.c:4145)
> __dev_queue_xmit (net/core/dev.c:4787)
> br_dev_queue_push_xmit (net/bridge/br_forward.c:53)
> br_handle_frame_finish (net/bridge/br_input.c:229)
> br_handle_frame (net/bridge/br_input.c:315)
> __netif_receive_skb_core.constprop.0 (net/core/dev.c:6099)
> __netif_receive_skb_list_core (net/core/dev.c:6287)
> netif_receive_skb_list_internal (net/core/dev.c:6445)
> napi_complete_done (net/core/dev.c:6813)
> gro_cell_poll (net/core/gro_cells.c:74)
> __napi_poll (net/core/dev.c:7735)
> net_rx_action (net/core/dev.c:7798 net/core/dev.c:7955)
> handle_softirqs (kernel/softirq.c:622)
> do_softirq (kernel/softirq.c:523 kernel/softirq.c:510 )
> __local_bh_enable_ip (kernel/softirq.c:450)
> tun_get_user (drivers/net/tun.c:1986 (discriminator 1))
> tun_chr_write_iter (drivers/net/tun.c:2032)
>
> [...]
Here is the summary with links:
- [net,v3] net: iptunnel: fix stale transport header during tunnel decapsulation
https://git.kernel.org/netdev/net/c/28a57fb2c5df
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
prev parent reply other threads:[~2026-08-28 23:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-25 12:39 [PATCH net v3] net: iptunnel: fix stale transport header during tunnel decapsulation Dong Chenchen
2026-08-28 23:10 ` patchwork-bot+netdevbpf [this message]
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