------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: kernel/locking/lockdep.c:238 at hlock_class kernel/locking/lockdep.c:238 [inline], CPU#0: ksoftirqd/0/15
WARNING: kernel/locking/lockdep.c:238 at check_wait_context kernel/locking/lockdep.c:4854 [inline], CPU#0: ksoftirqd/0/15
WARNING: kernel/locking/lockdep.c:238 at __lock_acquire+0x382/0x2cf0 kernel/locking/lockdep.c:5187, CPU#0: ksoftirqd/0/15
Modules linked in:
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:hlock_class kernel/locking/lockdep.c:238 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4854 [inline]
RIP: 0010:__lock_acquire+0x389/0x2cf0 kernel/locking/lockdep.c:5187
Code: 83 3d 0a 48 d5 18 00 75 27 90 e8 a2 2e 2d 03 85 c0 74 1c 83 3d bb bb b4 0e 00 75 13 48 8d 3d 0e 18 b8 0e 48 c7 c6 fe 10 35 8e <67> 48 0f b9 3a 90 31 c0 0f b6 98 c4 00 00 00 41 8b 45 20 25 ff 1f
RSP: 0018:ffffc90000147778 EFLAGS: 00010046
RAX: 0000000000000001 RBX: 0000000000042000 RCX: ffff88801dea9f00
RDX: 0000000000000100 RSI: ffffffff8e3510fe RDI: ffffffff905ad5a0
RBP: 0000000000000001 R08: ffffffff90577943 R09: 1ffffffff20aef28
R10: dffffc0000000000 R11: fffffbfff20aef29 R12: 0000000000000d1c
R13: ffff88801deaaaf0 R14: ffff88801dea9f00 R15: ffff88801deaaaa0
FS:  0000000000000000(0000) GS:ffff888124f55000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff27da27dac CR3: 0000000075794000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
 __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:158
 spin_lock include/linux/spinlock.h:342 [inline]
 tcp_tsq_handler+0x29/0x200 net/ipv4/tcp_output.c:1291
 tcp_tsq_workfn+0x384/0x410 net/ipv4/tcp_output.c:1325
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 bh_worker+0x44e/0x840 kernel/workqueue.c:3708
 tasklet_action+0xc/0x70 kernel/softirq.c:965
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1076
 smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	83 3d 0a 48 d5 18 00 	cmpl   $0x0,0x18d5480a(%rip)        # 0x18d54811
   7:	75 27                	jne    0x30
   9:	90                   	nop
   a:	e8 a2 2e 2d 03       	call   0x32d2eb1
   f:	85 c0                	test   %eax,%eax
  11:	74 1c                	je     0x2f
  13:	83 3d bb bb b4 0e 00 	cmpl   $0x0,0xeb4bbbb(%rip)        # 0xeb4bbd5
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d 0e 18 b8 0e 	lea    0xeb8180e(%rip),%rdi        # 0xeb81831
  23:	48 c7 c6 fe 10 35 8e 	mov    $0xffffffff8e3510fe,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	90                   	nop
  30:	31 c0                	xor    %eax,%eax
  32:	0f b6 98 c4 00 00 00 	movzbl 0xc4(%rax),%ebx
  39:	41 8b 45 20          	mov    0x20(%r13),%eax
  3d:	25                   	.byte 0x25
  3e:	ff 1f                	lcall  *(%rdi)