* [moderation/CI] Re: net: clear transport header during tunnel decapsulation
@ 2026-06-24 11:48 syzbot ci
2026-06-24 11:52 ` Aleksandr Nogikh
0 siblings, 1 reply; 2+ messages in thread
From: syzbot ci @ 2026-06-24 11:48 UTC (permalink / raw)
To: syzkaller-upstream-moderation; +Cc: syzbot
syzbot ci has tested the following series
[v1] net: clear transport header during tunnel decapsulation
https://lore.kernel.org/all/20260624073209.3703492-1-edumazet@google.com
* [PATCH net] net: clear transport header during tunnel decapsulation
and found the following issue:
WARNING in geneve_udp_encap_recv
Full report is available here:
https://ci.syzbot.org/series/1f6dc47e-354f-4904-bc18-c2b7ea4d79b2
***
WARNING in geneve_udp_encap_recv
tree: net
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net.git
base: d87363b0edfc7504ff2b144fe4cdd8154f90f42e
arch: amd64
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
config: https://ci.syzbot.org/builds/7bb83c16-d55d-4d99-8c2b-6050e0022ef6/config
------------[ cut here ]------------
!skb_transport_header_was_set(skb)
WARNING: ./include/linux/skbuff.h:3094 at geneve_udp_encap_recv+0x26ed/0x4130, CPU#1: kworker/1:3/5072
Modules linked in:
CPU: 1 UID: 0 PID: 5072 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: mld mld_ifc_work
RIP: 0010:geneve_udp_encap_recv+0x26ed/0x4130
Code: c8 00 00 00 0f b6 04 01 84 c0 0f 85 f2 18 00 00 48 8b 7c 24 78 66 44 89 6f 0a e8 7e 9b 7a 03 e9 8c 00 00 00 e8 f4 fc 33 fb 90 <0f> 0b 90 e9 2e e3 ff ff 49 83 c6 06 4c 89 f0 48 c1 e8 03 48 b9 00
RSP: 0018:ffffc90000a08620 EFLAGS: 00010246
RAX: ffffffff8691f92c RBX: ffff8881bcc8b5d0 RCX: ffff88816a7abb80
RDX: 0000000000000100 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: ffffc90000a08790 R08: ffffffff903114f7 R09: 1ffffffff206229e
R10: dffffc0000000000 R11: fffffbfff206229f R12: ffff888109f6a108
R13: 1ffff110213ed5df R14: 0000000000000010 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8882a927b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6956ea5440 CR3: 000000016f55c000 CR4: 00000000000006f0
Call Trace:
<IRQ>
udp_queue_rcv_one_skb+0xfc5/0x10e0
udp_unicast_rcv_skb+0x21a/0x3a0
udp_rcv+0xecb/0x1db0
ip_protocol_deliver_rcu+0x27e/0x440
ip_local_deliver_finish+0x3bb/0x6f0
NF_HOOK+0x336/0x3c0
NF_HOOK+0x336/0x3c0
process_backlog+0xa34/0x1860
__napi_poll+0xaa/0x330
net_rx_action+0x61d/0xf50
handle_softirqs+0x225/0x840
do_softirq+0x76/0xd0
</IRQ>
<TASK>
__local_bh_enable_ip+0xf8/0x130
__dev_queue_xmit+0x1ed7/0x37f0
ip6_output+0x337/0x540
NF_HOOK+0x177/0x4f0
mld_sendpack+0x890/0xe10
mld_ifc_work+0x839/0xe70
process_scheduled_works+0xa8e/0x14e0
worker_thread+0xa47/0xfb0
kthread+0x388/0x470
ret_from_fork+0x514/0xb70
ret_from_fork_asm+0x1a/0x30
</TASK>
***
If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
Tested-by: syzbot@syzkaller.appspotmail.com
---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.
To test a patch for this bug, please reply with `#syz test`
(should be on a separate line).
The patch should be attached to the email.
Note: arguments like custom git repos and branches are not supported.
The email will later be sent to:
[davem@davemloft.net dsahern@kernel.org edumazet@google.com eric.dumazet@gmail.com horms@kernel.org idosch@nvidia.com kuba@kernel.org netdev@vger.kernel.org pabeni@redhat.com syzbot@syzkaller.appspotmail.com]
If the report looks fine to you, reply with:
#syz upstream
If the report is a false positive, reply with
#syz invalid
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [moderation/CI] Re: net: clear transport header during tunnel decapsulation
2026-06-24 11:48 [moderation/CI] Re: net: clear transport header during tunnel decapsulation syzbot ci
@ 2026-06-24 11:52 ` Aleksandr Nogikh
0 siblings, 0 replies; 2+ messages in thread
From: Aleksandr Nogikh @ 2026-06-24 11:52 UTC (permalink / raw)
To: syzbot ci; +Cc: syzkaller-upstream-moderation, syzbot
#syz upstream
On Wed, Jun 24, 2026 at 1:48 PM syzbot ci
<syzbot+cic115a49afd959330@syzkaller.appspotmail.com> wrote:
>
> syzbot ci has tested the following series
>
> [v1] net: clear transport header during tunnel decapsulation
> https://lore.kernel.org/all/20260624073209.3703492-1-edumazet@google.com
> * [PATCH net] net: clear transport header during tunnel decapsulation
>
> and found the following issue:
> WARNING in geneve_udp_encap_recv
>
> Full report is available here:
> https://ci.syzbot.org/series/1f6dc47e-354f-4904-bc18-c2b7ea4d79b2
>
> ***
>
> WARNING in geneve_udp_encap_recv
>
> tree: net
> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net.git
> base: d87363b0edfc7504ff2b144fe4cdd8154f90f42e
> arch: amd64
> compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
> config: https://ci.syzbot.org/builds/7bb83c16-d55d-4d99-8c2b-6050e0022ef6/config
>
> ------------[ cut here ]------------
> !skb_transport_header_was_set(skb)
> WARNING: ./include/linux/skbuff.h:3094 at geneve_udp_encap_recv+0x26ed/0x4130, CPU#1: kworker/1:3/5072
> Modules linked in:
> CPU: 1 UID: 0 PID: 5072 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT(full)
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
> Workqueue: mld mld_ifc_work
> RIP: 0010:geneve_udp_encap_recv+0x26ed/0x4130
> Code: c8 00 00 00 0f b6 04 01 84 c0 0f 85 f2 18 00 00 48 8b 7c 24 78 66 44 89 6f 0a e8 7e 9b 7a 03 e9 8c 00 00 00 e8 f4 fc 33 fb 90 <0f> 0b 90 e9 2e e3 ff ff 49 83 c6 06 4c 89 f0 48 c1 e8 03 48 b9 00
> RSP: 0018:ffffc90000a08620 EFLAGS: 00010246
> RAX: ffffffff8691f92c RBX: ffff8881bcc8b5d0 RCX: ffff88816a7abb80
> RDX: 0000000000000100 RSI: 000000000000ffff RDI: 000000000000ffff
> RBP: ffffc90000a08790 R08: ffffffff903114f7 R09: 1ffffffff206229e
> R10: dffffc0000000000 R11: fffffbfff206229f R12: ffff888109f6a108
> R13: 1ffff110213ed5df R14: 0000000000000010 R15: dffffc0000000000
> FS: 0000000000000000(0000) GS:ffff8882a927b000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f6956ea5440 CR3: 000000016f55c000 CR4: 00000000000006f0
> Call Trace:
> <IRQ>
> udp_queue_rcv_one_skb+0xfc5/0x10e0
> udp_unicast_rcv_skb+0x21a/0x3a0
> udp_rcv+0xecb/0x1db0
> ip_protocol_deliver_rcu+0x27e/0x440
> ip_local_deliver_finish+0x3bb/0x6f0
> NF_HOOK+0x336/0x3c0
> NF_HOOK+0x336/0x3c0
> process_backlog+0xa34/0x1860
> __napi_poll+0xaa/0x330
> net_rx_action+0x61d/0xf50
> handle_softirqs+0x225/0x840
> do_softirq+0x76/0xd0
> </IRQ>
> <TASK>
> __local_bh_enable_ip+0xf8/0x130
> __dev_queue_xmit+0x1ed7/0x37f0
> ip6_output+0x337/0x540
> NF_HOOK+0x177/0x4f0
> mld_sendpack+0x890/0xe10
> mld_ifc_work+0x839/0xe70
> process_scheduled_works+0xa8e/0x14e0
> worker_thread+0xa47/0xfb0
> kthread+0x388/0x470
> ret_from_fork+0x514/0xb70
> ret_from_fork_asm+0x1a/0x30
> </TASK>
>
>
> ***
>
> If these findings have caused you to resend the series or submit a
> separate fix, please add the following tag to your commit message:
> Tested-by: syzbot@syzkaller.appspotmail.com
>
> ---
> This report is generated by a bot. It may contain errors.
> syzbot ci engineers can be reached at syzkaller@googlegroups.com.
>
> To test a patch for this bug, please reply with `#syz test`
> (should be on a separate line).
>
> The patch should be attached to the email.
> Note: arguments like custom git repos and branches are not supported.
>
> The email will later be sent to:
> [davem@davemloft.net dsahern@kernel.org edumazet@google.com eric.dumazet@gmail.com horms@kernel.org idosch@nvidia.com kuba@kernel.org netdev@vger.kernel.org pabeni@redhat.com syzbot@syzkaller.appspotmail.com]
>
> If the report looks fine to you, reply with:
> #syz upstream
>
> If the report is a false positive, reply with
> #syz invalid
>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-upstream-moderation" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-upstream-moderation+unsubscribe@googlegroups.com.
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^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-06-24 11:48 [moderation/CI] Re: net: clear transport header during tunnel decapsulation syzbot ci
2026-06-24 11:52 ` Aleksandr Nogikh
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