------------[ cut here ]------------
sysfs group 'statistics' not found for kobject 'bt0'
WARNING: CPU: 0 PID: 4277 at fs/sysfs/group.c:281 sysfs_remove_group+0x177/0x290 fs/sysfs/group.c:279
Modules linked in:
CPU: 0 PID: 4277 Comm: kworker/0:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: events delete_netdev
RIP: 0010:sysfs_remove_group+0x177/0x290 fs/sysfs/group.c:279
Code: 8b 1b 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 4b 26 d0 ff 49 8b 17 48 c7 c7 80 b3 39 8a 48 89 de e8 a9 e7 c8 07 <0f> 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 23 e1 8a ff
RSP: 0018:ffffc9000303f848 EFLAGS: 00010246
RAX: 995beac54d453b00 RBX: ffffffff8b20d6a0 RCX: ffff8880245c1dc0
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffff8880b8e33d7f R09: 1ffff110171c67af
R10: dffffc0000000000 R11: ffffed10171c67b0 R12: 1ffffffff16418fc
R13: dffffc0000000000 R14: ffff88802ca42e80 R15: ffff88807d78c608
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558e754dd168 CR3: 000000002dadb000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sysfs_remove_groups+0x50/0xa0 fs/sysfs/group.c:313
 device_remove_groups drivers/base/core.c:2498 [inline]
 device_remove_attrs+0xc2/0x140 drivers/base/core.c:2698
 device_del+0x637/0xa80 drivers/base/core.c:3614
 unregister_netdevice_many+0x1530/0x1a40 net/core/dev.c:11188
 unregister_netdevice_queue+0x2e1/0x320 net/core/dev.c:11094
 unregister_netdevice include/linux/netdevice.h:3047 [inline]
 lowpan_unregister_netdevice net/6lowpan/core.c:65 [inline]
 lowpan_unregister_netdev+0x18/0x20 net/6lowpan/core.c:73
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>