syzbot


WARNING in lowpan_xmit (2)

Status: upstream: reported C repro on 2025/06/24 20:30
Subsystems: wpan
[Documentation on labels]
Reported-by: syzbot+5b74e0e96f12e3728ec8@syzkaller.appspotmail.com
First crash: 323d, last: 19h39m
Cause bisection: failed (error log, bisect log)
  
Discussions (7)
Title Replies (including bot) Last reply
[syzbot] Monthly wpan report (Apr 2026) 0 (1) 2026/04/29 20:32
[syzbot] Monthly wpan report (Mar 2026) 0 (1) 2026/03/31 08:07
[syzbot] Monthly wpan report (Feb 2026) 0 (1) 2026/02/26 12:59
[syzbot] Monthly wpan report (Jan 2026) 0 (1) 2026/01/26 07:12
[syzbot] [wpan?] WARNING in lowpan_xmit (2) 0 (2) 2026/01/10 07:57
[syzbot] Monthly wpan report (Dec 2025) 0 (1) 2025/12/26 07:48
[syzbot] Monthly wpan report (Sep 2025) 0 (1) 2025/09/17 08:29
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in lowpan_xmit wpan -1 2 604d 695d 0/29 auto-obsoleted due to no activity on 2024/12/22 09:15
Last patch testing requests (4)
Created Duration User Patch Repo Result
2026/04/14 18:59 17m retest repro upstream report log
2026/02/28 04:30 4h07m retest repro net-next report log
2026/02/03 18:18 12m retest repro upstream error
2025/07/04 23:20 25m retest repro net-next OK log
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/12/13 17:56 5h02m bisect fix net-next OK (0) job log log

Sample crash report:
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
------------[ cut here ]------------
WARNING: ./include/linux/skbuff.h:3227 at skb_network_header_len include/linux/skbuff.h:3227 [inline], CPU#1: aoe_tx0/1301
WARNING: ./include/linux/skbuff.h:3227 at lowpan_header net/ieee802154/6lowpan/tx.c:236 [inline], CPU#1: aoe_tx0/1301
WARNING: ./include/linux/skbuff.h:3227 at lowpan_xmit+0xea9/0x1210 net/ieee802154/6lowpan/tx.c:282, CPU#1: aoe_tx0/1301
Modules linked in:
CPU: 1 UID: 0 PID: 1301 Comm: aoe_tx0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:skb_network_header_len include/linux/skbuff.h:3227 [inline]
RIP: 0010:lowpan_header net/ieee802154/6lowpan/tx.c:236 [inline]
RIP: 0010:lowpan_xmit+0xea9/0x1210 net/ieee802154/6lowpan/tx.c:282
Code: ff ff 4c 89 ff 48 01 81 38 02 00 00 e8 30 d8 0f fe e9 e6 fb ff ff e8 46 a3 8f f6 90 0f 0b 90 e9 a3 f5 ff ff e8 38 a3 8f f6 90 <0f> 0b 90 e9 86 f6 ff ff e8 2a a3 8f f6 0f b7 8d e0 fe ff ff 44 8b
RSP: 0018:ffffc9000476f860 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc9000476f8e0 RCX: ffffffff8b2ebe6c
RDX: ffff888028a3bd00 RSI: ffffffff8b2ec7e8 RDI: 0000000000000003
RBP: ffffc9000476f9f0 R08: 0000000000000003 R09: 000000000000ffff
R10: 000000000000ffff R11: 0000000000000000 R12: ffff88801d79a476
R13: 000000000000ffff R14: ffff888028234d90 R15: ffff88801d79a3c0
FS:  0000000000000000(0000) GS:ffff8881249fa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c007868000 CR3: 0000000071880000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __netdev_start_xmit include/linux/netdevice.h:5273 [inline]
 netdev_start_xmit include/linux/netdevice.h:5282 [inline]
 xmit_one net/core/dev.c:3853 [inline]
 dev_hard_start_xmit+0x97/0x6e0 net/core/dev.c:3869
 __dev_queue_xmit+0x6d7/0x46b0 net/core/dev.c:4819
 dev_queue_xmit include/linux/netdevice.h:3381 [inline]
 tx+0xcc/0x190 drivers/block/aoe/aoenet.c:62
 kthread+0x1e4/0x3e0 drivers/block/aoe/aoecmd.c:1241
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

Crashes (782):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/10 07:57 upstream 372800cb95a3 d1b870e1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/02/12 23:53 net-next 37a93dd5c49b 504cb1bf .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
2026/05/09 23:04 upstream 1bfaee9d3351 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lowpan_xmit
2026/05/09 22:59 upstream 1bfaee9d3351 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lowpan_xmit
2026/05/09 09:07 upstream 70390501d194 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lowpan_xmit
2026/05/08 22:12 upstream 81d6f7807536 0c5a8d8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lowpan_xmit
2026/05/08 19:52 upstream 81d6f7807536 0c5a8d8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in lowpan_xmit
2026/05/07 21:06 upstream 19cbc75c56c0 e358bca5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lowpan_xmit
2026/05/07 21:06 upstream 19cbc75c56c0 e358bca5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lowpan_xmit
2026/05/07 19:08 upstream 19cbc75c56c0 e358bca5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in lowpan_xmit
2026/05/07 08:54 upstream 5862221fdded f250db59 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lowpan_xmit
2026/05/07 05:36 upstream 5862221fdded f250db59 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in lowpan_xmit
2026/05/06 17:36 upstream 74fe02ce122a cbcd9ea0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lowpan_xmit
2026/05/06 09:39 upstream 9207d47f966b 26da2c66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in lowpan_xmit
2026/05/06 03:34 upstream 9207d47f966b 26da2c66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in lowpan_xmit
2026/05/06 03:33 upstream 9207d47f966b 26da2c66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in lowpan_xmit
2026/05/05 23:35 upstream a293ec25d59d 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in lowpan_xmit
2026/05/05 15:45 upstream a293ec25d59d 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lowpan_xmit
2026/05/05 13:50 upstream a293ec25d59d 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in lowpan_xmit
2026/05/05 03:12 upstream c7e4e4d5f7dc a898ba9c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in lowpan_xmit
2026/05/05 03:01 upstream c7e4e4d5f7dc a898ba9c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lowpan_xmit
2026/05/04 11:52 upstream 6d35786de281 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in lowpan_xmit
2026/01/20 17:48 upstream 24d479d26b25 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/05/08 08:28 upstream fcee7d82f27d e358bca5 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in lowpan_xmit
2026/05/05 07:30 upstream c7e4e4d5f7dc a898ba9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in lowpan_xmit
2026/05/05 07:21 upstream c7e4e4d5f7dc a898ba9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in lowpan_xmit
2026/05/05 06:13 upstream c7e4e4d5f7dc a898ba9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in lowpan_xmit
2026/05/05 05:03 upstream c7e4e4d5f7dc a898ba9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in lowpan_xmit
2026/05/05 02:00 upstream c7e4e4d5f7dc a898ba9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in lowpan_xmit
2026/05/05 00:51 upstream c7e4e4d5f7dc a898ba9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in lowpan_xmit
2026/05/04 23:48 upstream c7e4e4d5f7dc a898ba9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in lowpan_xmit
2026/05/04 22:48 upstream c7e4e4d5f7dc a898ba9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in lowpan_xmit
2026/05/04 19:39 upstream 6d35786de281 85f1bcf2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in lowpan_xmit
2026/05/04 15:24 upstream 6d35786de281 85f1bcf2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in lowpan_xmit
2026/05/04 14:13 upstream 6d35786de281 85f1bcf2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in lowpan_xmit
2026/05/05 21:16 upstream 9207d47f966b 26da2c66 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in lowpan_xmit
2026/05/05 18:25 upstream a293ec25d59d 114c483e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in lowpan_xmit
2026/05/05 16:51 upstream a293ec25d59d 114c483e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in lowpan_xmit
2026/05/05 16:51 upstream a293ec25d59d 114c483e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in lowpan_xmit
2026/05/03 12:06 net 1d324c2f43f7 a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in lowpan_xmit
2026/05/09 05:21 net-next ae5c3718aeec 0c5a8d8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
2026/05/06 11:24 net-next 8c699be3dad7 26da2c66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
2026/05/04 21:47 net-next 98878ed91b68 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
2026/05/04 18:11 net-next 98878ed91b68 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
2026/05/04 17:10 net-next 98878ed91b68 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
2026/05/04 16:03 net-next 98878ed91b68 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
2025/06/20 23:05 net-next 4f4040ea5d3e e3003213 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
2026/05/08 02:16 linux-next 17c7841d09ee e358bca5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in lowpan_xmit
2026/05/07 17:38 linux-next 17c7841d09ee e358bca5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in lowpan_xmit
2026/05/07 14:49 linux-next 17c7841d09ee f250db59 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in lowpan_xmit
2026/05/06 18:32 linux-next 735d2f48cada cbcd9ea0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in lowpan_xmit
2026/05/06 12:41 linux-next 4cd074ae20bb 26da2c66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in lowpan_xmit
2026/05/06 00:54 linux-next 4cd074ae20bb 26da2c66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in lowpan_xmit
2026/05/05 12:23 linux-next 9d0d467c3572 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in lowpan_xmit
2026/05/04 20:18 linux-next b9303e6bff70 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in lowpan_xmit
2026/05/04 13:05 linux-next b9303e6bff70 85f1bcf2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in lowpan_xmit
* Struck through repros no longer work on HEAD.