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: 205d, last: 1h28m
Cause bisection: failed (error log, bisect log)
  
Discussions (3)
Title Replies (including bot) Last reply
[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 485d 576d 0/29 auto-obsoleted due to no activity on 2024/12/22 09:15
Last patch testing requests (1)
Created Duration User Patch Repo Result
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 (59):
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
2026/01/12 00:39 upstream 755bc1335e3b d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/11 23:34 upstream 755bc1335e3b d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/11 19:25 upstream 755bc1335e3b d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/11 18:13 upstream 755bc1335e3b d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/11 16:57 upstream 755bc1335e3b d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/11 12:59 upstream 755bc1335e3b d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/11 09:01 upstream 97313d6113ab d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/11 06:17 upstream 97313d6113ab d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/11 05:12 upstream 97313d6113ab d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 23:52 upstream 97313d6113ab d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 23:52 upstream 97313d6113ab d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 23:52 upstream 97313d6113ab d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 22:27 upstream b6151c4e60e5 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 22:06 upstream b6151c4e60e5 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 20:42 upstream b6151c4e60e5 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 17:00 upstream b6151c4e60e5 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 13:40 upstream b6151c4e60e5 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 10:18 upstream b6151c4e60e5 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 07:58 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:19 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:19 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:16 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:15 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:15 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:13 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:12 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:12 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:09 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:08 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:08 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:03 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:03 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:03 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:00 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 06:00 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 05:59 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 05:56 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 05:56 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 05:56 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 05:52 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 05:52 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 05:52 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 05:49 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 05:49 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2026/01/10 05:48 upstream 372800cb95a3 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in lowpan_xmit
2025/09/16 11:55 net 4351ca3fcb3f e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in lowpan_xmit
2025/08/08 19:08 net-next 37816488247d 987b750d .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
2025/06/20 20:23 net-next 4f4040ea5d3e e3003213 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in lowpan_xmit
* Struck through repros no longer work on HEAD.