------------[ cut here ]------------
WARNING: CPU: 0 PID: 9002 at kernel/workqueue.c:2257 __queue_work+0xcd3/0xf50 kernel/workqueue.c:2256
Modules linked in:
CPU: 0 UID: 0 PID: 9002 Comm: syz-executor Not tainted 6.13.0-rc2-syzkaller-00146-g922b4b955a03 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:__queue_work+0xcd3/0xf50 kernel/workqueue.c:2256
Code: ff e8 71 e8 37 00 90 0f 0b 90 e9 b2 fe ff ff e8 63 e8 37 00 eb 13 e8 5c e8 37 00 eb 0c e8 55 e8 37 00 eb 05 e8 4e e8 37 00 90 <0f> 0b 90 48 83 c4 60 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc
RSP: 0018:ffffc90000007b08 EFLAGS: 00010046
RAX: ffffffff816775dd RBX: 0000000000000100 RCX: ffff88802bf83c00
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000010000 R08: ffffffff81676a08 R09: 1ffffffff2032c7e
R10: dffffc0000000000 R11: ffffffff81677e10 R12: ffff88807f7ca800
R13: ffff88807f7ca9c0 R14: dffffc0000000000 R15: 0000000000000008
FS:  000055556adcd500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f84c83fed00 CR3: 000000007994c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x187/0x650 kernel/time/timer.c:1793
 expire_timers kernel/time/timer.c:1839 [inline]
 __run_timers kernel/time/timer.c:2418 [inline]
 __run_timer_base+0x695/0x8e0 kernel/time/timer.c:2430
 run_timer_base kernel/time/timer.c:2439 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kernfs_name_compare fs/kernfs/dir.c:331 [inline]
RIP: 0010:kernfs_sd_compare fs/kernfs/dir.c:345 [inline]
RIP: 0010:kernfs_link_sibling+0xe1/0x420 fs/kernfs/dir.c:372
Code: 20 00 74 08 48 89 ef e8 6d 35 c3 ff 48 8b 45 00 48 89 44 24 20 4c 89 7c 24 08 49 8d 6e 20 48 89 e8 48 c1 e8 03 42 0f b6 04 20 <84> c0 0f 85 11 01 00 00 8b 6d 00 89 ef 44 89 ee e8 0a d6 5c ff 44
RSP: 0018:ffffc9000c4ef5a8 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffff888142ec8bb0 RCX: ffff88802bf83c00
RDX: 0000000000000000 RSI: 000000003222b852 RDI: ffff88803326c218
RBP: ffff88802f4dfc90 R08: ffffffff82428390 R09: 1ffff1100375dd1c
R10: dffffc0000000000 R11: ffffed100375dd1d R12: dffffc0000000000
R13: 000000003222b852 R14: ffff88802f4dfc70 R15: ffff88803326c1e0
 kernfs_add_one+0x393/0x8b0 fs/kernfs/dir.c:795
 kernfs_create_link+0x161/0x1f0 fs/kernfs/symlink.c:48
 sysfs_do_create_link_sd+0x85/0x110 fs/sysfs/symlink.c:44
 device_add_class_symlinks+0x1c5/0x250 drivers/base/core.c:3424
 device_add+0x553/0xbf0 drivers/base/core.c:3616
 netdev_register_kobject+0x157/0x2e0 net/core/net-sysfs.c:2139
 register_netdevice+0x12c5/0x1b00 net/core/dev.c:10599
 __ip_tunnel_create+0x2b4/0x380 net/ipv4/ip_tunnel.c:267
 ip_tunnel_init_net+0x21c/0x720 net/ipv4/ip_tunnel.c:1160
 ops_init+0x31e/0x590 net/core/net_namespace.c:138
 setup_net+0x287/0x9e0 net/core/net_namespace.c:362
 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:516
 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
 ksys_unshare+0x57d/0xa70 kernel/fork.c:3334
 __do_sys_unshare kernel/fork.c:3405 [inline]
 __se_sys_unshare kernel/fork.c:3403 [inline]
 __x64_sys_unshare+0x38/0x40 kernel/fork.c:3403
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa705787517
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 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:00007ffe2d1e84b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa705787517
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007ffe2d1e8520 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffe2d1e8520
R13: 00007ffe2d1e8528 R14: 0000000000000009 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	20 00                	and    %al,(%rax)
   2:	74 08                	je     0xc
   4:	48 89 ef             	mov    %rbp,%rdi
   7:	e8 6d 35 c3 ff       	call   0xffc33579
   c:	48 8b 45 00          	mov    0x0(%rbp),%rax
  10:	48 89 44 24 20       	mov    %rax,0x20(%rsp)
  15:	4c 89 7c 24 08       	mov    %r15,0x8(%rsp)
  1a:	49 8d 6e 20          	lea    0x20(%r14),%rbp
  1e:	48 89 e8             	mov    %rbp,%rax
  21:	48 c1 e8 03          	shr    $0x3,%rax
  25:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax
* 2a:	84 c0                	test   %al,%al <-- trapping instruction
  2c:	0f 85 11 01 00 00    	jne    0x143
  32:	8b 6d 00             	mov    0x0(%rbp),%ebp
  35:	89 ef                	mov    %ebp,%edi
  37:	44 89 ee             	mov    %r13d,%esi
  3a:	e8 0a d6 5c ff       	call   0xff5cd649
  3f:	44                   	rex.R