WARNING in cfg802154_switch_netns (3)

Status: upstream: reported C repro on 2024/12/04 09:32
Subsystems: wpan
[Documentation on labels]
Reported-by: syzbot+bd5829ba3619f08e2341@syzkaller.appspotmail.com
First crash: 634d, last: 85d
Cause bisection: failed (error log, bisect log)
  
Fix bisection: failed (error log, bisect log)
  
✨ AI Patch Versions (4)
Version Stage Reported Report Link Job
4 moderation 2026/05/21 01:44 Discussion a51ccb7f-a2f2-4fc2-85fb-a0706afcc0e8
3 moderation 2026/05/19 18:36 Discussion c84689f4-6a93-47bf-80ca-3bc6137dce52
2 moderation 2026/05/18 22:07 Discussion a1cfc84c-7c0f-4340-891d-885fcee80cad
1 moderation 2026/05/13 21:50 Discussion 46668339-436e-4563-9254-73690dc813fe
✨ AI Jobs (11)
ID Workflow Result Correct Bug Created Started Finished Revision
10e683d0 assessment-security 💥 WARNING in cfg802154_switch_netns (3) 2026/08/05 00:02 2026/08/05 00:02 2026/08/05 00:02 d4abbeac
a7f4aa21 assessment-security 💥 WARNING in cfg802154_switch_netns (3) 2026/07/05 03:56 2026/07/05 03:56 2026/07/05 04:16 93f57954
7b138790 assessment-security 💥 WARNING in cfg802154_switch_netns (3) 2026/06/18 03:24 2026/06/18 03:24 2026/06/18 03:50 b62b3ded
c485b212 assessment-security 💥 WARNING in cfg802154_switch_netns (3) 2026/06/09 23:30 2026/06/09 23:30 2026/06/09 23:53 c36c07f6
5ba66958 assessment-security 💥 WARNING in cfg802154_switch_netns (3) 2026/06/04 01:09 2026/06/04 01:09 2026/06/04 01:26 62fe1528
935bf158 assessment-security 💥 WARNING in cfg802154_switch_netns (3) 2026/06/01 12:50 2026/06/01 12:50 2026/06/01 13:18 6b4a8443
a51ccb7f patch-iteration WARNING in cfg802154_switch_netns (3) 2026/05/21 00:40 2026/05/21 00:40 2026/05/21 01:44 cf874a1c
c84689f4 patch-iteration WARNING in cfg802154_switch_netns (3) 2026/05/19 17:25 2026/05/19 17:25 2026/05/19 18:36 1d9407ad
a1cfc84c patch-iteration WARNING in cfg802154_switch_netns (3) 2026/05/18 20:10 2026/05/18 20:10 2026/05/18 22:07 9f74d399
6f2ae8e8 assessment-security 💥 WARNING in cfg802154_switch_netns (3) 2026/05/15 14:27 2026/05/15 14:27 2026/05/15 14:44 efdaf0f9
46668339 patching-compressed WARNING in cfg802154_switch_netns (3) 2026/05/13 20:02 2026/05/13 20:18 2026/05/13 21:50 71153e5d
Discussions (6)
Title Replies (including bot) Last reply
[syzbot] [wpan?] WARNING in cfg802154_switch_netns (3) 1 (4) 2026/05/19 14:17
[syzbot] Monthly wpan report (Jan 2026) 0 (1) 2026/01/26 07:12
[syzbot] Monthly wpan report (Nov 2025) 0 (1) 2025/11/24 12:38
[syzbot] Monthly wpan report (Apr 2025) 0 (1) 2025/04/11 13:07
[syzbot] Monthly wpan report (Mar 2025) 0 (1) 2025/03/11 14:05
[syzbot] Monthly wpan report (Jan 2025) 0 (1) 2025/01/07 14:54
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in cfg802154_switch_netns wpan -1 12 902d 940d 0/29 auto-obsoleted due to no activity on 2024/05/17 00:34
linux-5.15 WARNING in cfg802154_switch_netns origin:upstream -1 syz, C error 4 52d 562d 0/3 upstream: reported C repro on 2025/02/10 10:37
upstream WARNING in cfg802154_switch_netns (2) wpan -1 1 747d 743d 0/29 auto-obsoleted due to no activity on 2024/11/17 17:31
Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/08/26 10:06 25m retest repro net-next no crash job log log
2026/06/17 07:42 32m retest repro net-next log
2026/03/09 06:53 17m retest repro net-next report log
2025/12/27 01:55 20m retest repro upstream no crash log
2025/10/18 01:19 15m retest repro upstream report log
2025/08/09 00:41 21m retest repro upstream report log
2025/05/31 00:14 15m retest repro upstream report log
2025/03/14 22:37 17m retest repro upstream report log
2025/02/07 21:42 18m retest repro net-next report log
2024/12/17 02:25 18m retest repro upstream report log
Fix bisection attempts (8)
Created Duration User Patch Repo Result
2026/04/08 07:14 6m bisect fix net-next error job log
2025/12/29 01:44 3h56m bisect fix net-next OK (0) job log log
2025/11/24 09:03 3h15m bisect fix net-next OK (0) job log log
2025/09/23 21:41 2h04m bisect fix net-next OK (0) job log log
2025/07/17 18:45 3h30m bisect fix net-next OK (0) job log log
2025/06/16 15:37 2h35m bisect fix net-next OK (0) job log log
2025/05/15 20:49 1h27m bisect fix net-next OK (0) job log log
2025/03/31 01:01 2h14m bisect fix net-next OK (0) job log log

Sample crash report:
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fa8d23e6038 R14: 00007fa8d23e5fa0 R15: 00007fff91ab19b8
 </TASK>
------------[ cut here ]------------
WARNING: net/ieee802154/core.c:258 at cfg802154_switch_netns+0x3b1/0x470 net/ieee802154/core.c:258, CPU#1: syz.0.622/8297
Modules linked in:
CPU: 1 UID: 0 PID: 8297 Comm: syz.0.622 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:cfg802154_switch_netns+0x3b1/0x470 net/ieee802154/core.c:258
Code: 56 ed 8c 48 8b 7b 20 e8 9d d9 1c fe 31 ff 89 c5 89 c6 e8 12 01 91 f6 85 ed 0f 84 0f ff ff ff e9 01 ff ff ff e8 60 06 91 f6 90 <0f> 0b 90 e9 2a fe ff ff 4c 89 ef e8 cf db fa f6 e9 ad fc ff ff e8
RSP: 0018:ffffc9000c3cf510 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000fffffff4 RCX: ffffffff8b2de07b
RDX: ffff888032f28000 RSI: ffffffff8b2de250 RDI: 0000000000000005
RBP: ffff8880288e4198 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: 0000000000000001 R12: ffff8880288e4000
R13: ffff88807562e8c0 R14: ffff8880288e4078 R15: ffff8880288e4000
FS:  00007fa8d2f756c0(0000) GS:ffff8881249f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa8d21753c0 CR3: 0000000033c66000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 nl802154_wpan_phy_netns+0x132/0x480 net/ieee802154/nl802154.c:1292
 genl_family_rcv_msg_doit+0x209/0x2f0 net/netlink/genetlink.c:1115
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0x55c/0x800 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2550
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8c8/0xdd0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0xa5d/0xc30 net/socket.c:2592
 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2646
 __sys_sendmsg+0x16d/0x220 net/socket.c:2678
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa8d218f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa8d2f75038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa8d23e5fa0 RCX: 00007fa8d218f749
RDX: 0000000004000000 RSI: 0000200000000280 RDI: 0000000000000004
RBP: 00007fa8d2f75090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fa8d23e6038 R14: 00007fa8d23e5fa0 R15: 00007fff91ab19b8
 </TASK>

Crashes (23):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/08 04:53 upstream f0b9d8eb98df d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in cfg802154_switch_netns
2024/12/03 02:10 upstream cdd30ebb1b9f bb326ffb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in cfg802154_switch_netns
2025/08/15 14:40 upstream d7ee5bdce789 1804e95e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in cfg802154_switch_netns
2025/04/11 13:11 upstream 900241a5cc15 12ba9c21 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in cfg802154_switch_netns
2024/11/30 09:21 upstream 2ba9f676d0a2 68914665 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in cfg802154_switch_netns
2026/02/12 09:07 upstream 1e83ccd5921a 76a109e2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/11/29 01:43 upstream e538109ac71d d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/10/21 23:56 upstream 6548d364a3e8 252fbbad .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/05/16 23:49 upstream 3c21441eeffc f41472b0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/04/14 03:35 upstream 5aaaedb0cb54 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/02/28 22:12 upstream 76544811c850 1e7a43e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/02/19 05:57 upstream 6537cfb395f3 9a14138f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/01/12 02:03 upstream b62cef9a5c67 6dbc6a9b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2026/06/03 01:38 net 5eba3e48d78e 3c0d2131 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in cfg802154_switch_netns
2026/05/13 11:47 net f5b2772d1488 fec2a7ee .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in cfg802154_switch_netns
2026/01/15 11:31 net 4156c3745f06 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in cfg802154_switch_netns
2025/01/21 06:46 net d640627663bf 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in cfg802154_switch_netns
2024/12/31 16:08 net 4f619d518db9 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in cfg802154_switch_netns
2026/05/19 13:10 net-next 7af2a94f4dcf 223544dc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg802154_switch_netns
2025/02/22 03:57 net-next e6a532185daa d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg802154_switch_netns
2025/01/22 04:27 net-next b1754a69e7be da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg802154_switch_netns
2025/01/11 07:37 net-next 7b24f164cf00 6dbc6a9b .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg802154_switch_netns
2025/01/11 05:09 net-next 7b24f164cf00 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg802154_switch_netns
* Struck through repros no longer work on HEAD.