syzbot

list_del corruption, ffff888114a18c00->next is NULL
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kernel BUG at lib/list_debug.c:52!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 91 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: events_unbound linkwatch_event
RIP: 0010:__list_del_entry_valid_or_report.cold+0x22/0x2a lib/list_debug.c:52
Code: e8 9d d8 fa ff 90 0f 0b 48 89 de 48 c7 c7 80 85 b0 87 e8 8b d8 fa ff 90 0f 0b 48 89 de 48 c7 c7 20 85 b0 87 e8 79 d8 fa ff 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000517870 EFLAGS: 00010086
RAX: 0000000000000033 RBX: ffff888114a18c00 RCX: 0000000000000000
RDX: 0000000000000033 RSI: ffffffff819207d9 RDI: fffff520000a2eff
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000202 R11: fffffffffffeb4a0 R12: 0000000000000000
R13: ffffc900005178c0 R14: ffff888135550678 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8882687a5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007febffbd4e9c CR3: 0000000120bc2000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:132 [inline]
 __list_del_entry include/linux/list.h:246 [inline]
 list_move_tail include/linux/list.h:341 [inline]
 ref_tracker_free+0x1a7/0x6c0 lib/ref_tracker.c:329
 netdev_tracker_free include/linux/netdevice.h:4491 [inline]
 netdev_put include/linux/netdevice.h:4508 [inline]
 netdev_put include/linux/netdevice.h:4504 [inline]
 netdev_watchdog_down net/sched/sch_generic.c:600 [inline]
 dev_deactivate_many+0x28c/0xfe0 net/sched/sch_generic.c:1363
 dev_deactivate+0x109/0x1d0 net/sched/sch_generic.c:1397
 linkwatch_do_dev net/core/link_watch.c:184 [inline]
 linkwatch_do_dev+0xd3/0x120 net/core/link_watch.c:166
 __linkwatch_run_queue+0x3a5/0x810 net/core/link_watch.c:240
 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:314
 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314
 process_scheduled_works kernel/workqueue.c:3397 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report.cold+0x22/0x2a lib/list_debug.c:52
Code: e8 9d d8 fa ff 90 0f 0b 48 89 de 48 c7 c7 80 85 b0 87 e8 8b d8 fa ff 90 0f 0b 48 89 de 48 c7 c7 20 85 b0 87 e8 79 d8 fa ff 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000517870 EFLAGS: 00010086
RAX: 0000000000000033 RBX: ffff888114a18c00 RCX: 0000000000000000
RDX: 0000000000000033 RSI: ffffffff819207d9 RDI: fffff520000a2eff
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000202 R11: fffffffffffeb4a0 R12: 0000000000000000
R13: ffffc900005178c0 R14: ffff888135550678 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8882687a5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007febffbd4e9c CR3: 0000000120bc2000 CR4: 00000000003506f0