From: Jiayuan Chen <jiayuan.chen@linux.dev>
To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com,
horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, pabeni@redhat.com, pshelar@nicira.com,
syzbot@syzkaller.appspotmail.com, tom@herbertland.com
Cc: syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot ci] Re: net: tunnel: fix stale transport header after GRE/TEB decap
Date: Thu, 16 Apr 2026 15:49:58 +0800 [thread overview]
Message-ID: <0e579779-f38b-4db3-936b-5d7add12d15e@linux.dev> (raw)
In-Reply-To: <69e08a0a.a70a0220.259bc5.0019.GAE@google.com>
On 4/16/26 3:04 PM, syzbot ci wrote:
> syzbot ci has tested the following series
>
> [v1] net: tunnel: fix stale transport header after GRE/TEB decap
> https://lore.kernel.org/all/20260416034610.8873-1-jiayuan.chen@linux.dev
> * [PATCH net v1 1/2] net: tunnel: fix stale transport header after GRE/TEB decap
> * [PATCH net-next v1 2/2] net: add DEBUG_NET_WARN_ON_ONCE for negative transport offset
>
> and found the following issue:
> WARNING in udpv6_err
>
> Full report is available here:
> https://ci.syzbot.org/series/3886f2f1-a6d5-4c5c-8dc8-bc1cec577567
>
> ***
>
> WARNING in udpv6_err
>
> tree: net
> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net.git
> base: 1f5ffc672165ff851063a5fd044b727ab2517ae3
> arch: amd64
> compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
> config: https://ci.syzbot.org/builds/06cf41a2-60fe-4f9b-8f68-57eb6d1e48cc/config
>
> ------------[ cut here ]------------
> off < 0
> WARNING: ./include/linux/skbuff.h:3239 at udpv6_err+0x1521/0x16d0, CPU#0: kworker/u9:2/51
> Modules linked in:
icmpv6_rcv
pskb_pull ==> skb_transport_offset() = -8
icmpv6_notify
udpv6_err
__udp6_lib_err_encap(skb) ==> WARNING
prev parent reply other threads:[~2026-04-16 7:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-16 3:46 [PATCH net v1 1/2] net: tunnel: fix stale transport header after GRE/TEB decap Jiayuan Chen
2026-04-16 3:46 ` [PATCH net-next v1 2/2] net: add DEBUG_NET_WARN_ON_ONCE for negative transport offset Jiayuan Chen
2026-04-16 7:04 ` [syzbot ci] Re: net: tunnel: fix stale transport header after GRE/TEB decap syzbot ci
2026-04-16 7:49 ` Jiayuan Chen [this message]
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