Oops: general protection fault, probably for non-canonical address 0xdffffc0000000055: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000002a8-0x00000000000002af]
CPU: 1 UID: 0 PID: 5983 Comm: kworker/u8:18 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound linkwatch_event
RIP: 0010:netdev_need_ops_lock include/net/netdev_lock.h:33 [inline]
RIP: 0010:netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
RIP: 0010:__linkwatch_run_queue+0x651/0x8a0 net/core/link_watch.c:245
Code: 80 3c 02 00 0f 85 4a 02 00 00 4c 8b a3 78 f9 ff ff 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 a8 02 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 16 02 00 00 49 83 bc 24 a8 02 00 00 00 0f 84 ad
RSP: 0018:ffffc900057afad0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88802eb9c690 RCX: ffffffff89502016
RDX: 0000000000000055 RSI: ffffffff8950234f RDI: 00000000000002a8
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffff888034412ff0 R12: 0000000000000000
R13: 0000000000000064 R14: 0000000000000000 R15: ffffc900057afb10
FS:  0000000000000000(0000) GS:ffff8881249f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa60df156c0 CR3: 0000000054edc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:304
 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
 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>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:netdev_need_ops_lock include/net/netdev_lock.h:33 [inline]
RIP: 0010:netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
RIP: 0010:__linkwatch_run_queue+0x651/0x8a0 net/core/link_watch.c:245
Code: 80 3c 02 00 0f 85 4a 02 00 00 4c 8b a3 78 f9 ff ff 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 a8 02 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 16 02 00 00 49 83 bc 24 a8 02 00 00 00 0f 84 ad
RSP: 0018:ffffc900057afad0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88802eb9c690 RCX: ffffffff89502016
RDX: 0000000000000055 RSI: ffffffff8950234f RDI: 00000000000002a8
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffff888034412ff0 R12: 0000000000000000
R13: 0000000000000064 R14: 0000000000000000 R15: ffffc900057afb10
FS:  0000000000000000(0000) GS:ffff8881249f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa60e077f98 CR3: 000000000e184000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   4:	0f 85 4a 02 00 00    	jne    0x254
   a:	4c 8b a3 78 f9 ff ff 	mov    -0x688(%rbx),%r12
  11:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  18:	fc ff df
  1b:	49 8d bc 24 a8 02 00 	lea    0x2a8(%r12),%rdi
  22:	00
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 16 02 00 00    	jne    0x24a
  34:	49 83 bc 24 a8 02 00 	cmpq   $0x0,0x2a8(%r12)
  3b:	00 00
  3d:	0f                   	.byte 0xf
  3e:	84                   	.byte 0x84
  3f:	ad                   	lods   %ds:(%rsi),%eax