------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: kernel/locking/lockdep.c:238 at hlock_class kernel/locking/lockdep.c:238 [inline], CPU#1: ktimers/1/29
WARNING: kernel/locking/lockdep.c:238 at check_wait_context kernel/locking/lockdep.c:4854 [inline], CPU#1: ktimers/1/29
WARNING: kernel/locking/lockdep.c:238 at __lock_acquire+0x382/0x2ce0 kernel/locking/lockdep.c:5187, CPU#1: ktimers/1/29
Modules linked in:
CPU: 1 UID: 0 PID: 29 Comm: ktimers/1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
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+0x389/0x2ce0 kernel/locking/lockdep.c:5187
Code: 83 3d fa 84 07 18 00 75 27 90 e8 a2 ae 1d 03 85 c0 74 1c 83 3d eb fd 0d 0e 00 75 13 48 8d 3d 3e 48 11 0e 48 c7 c6 d4 f6 99 8d <67> 48 0f b9 3a 90 31 c0 0f b6 98 c4 00 00 00 41 8b 45 20 25 ff 1f
RSP: 0018:ffffc90000a3f6b8 EFLAGS: 00010046
RAX: 0000000000000001 RBX: 0000000000040000 RCX: ffff88801d2b3e00
RDX: 0000000000000100 RSI: ffffffff8d99f6d4 RDI: ffffffff8fb2a8e0
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000100
R10: dffffc0000000000 R11: fffffbfff1f5ebd1 R12: 0000000000000df2
R13: ffff88801d2b4af8 R14: ffff88801d2b3e00 R15: ffff88801d2b4a08
FS:  0000000000000000(0000) GS:ffff888125d46000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32222ff8 CR3: 0000000077212000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
 rt_spin_lock+0x83/0x400 kernel/locking/spinlock_rt.c:56
 spin_lock include/linux/spinlock_rt.h:45 [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+0x46a/0x880 kernel/workqueue.c:3708
 tasklet_action+0xc/0x70 kernel/softirq.c:965
 handle_softirqs+0x1d9/0x6c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 run_ktimerd+0x69/0x100 kernel/softirq.c:1151
 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 fa 84 07 18 00 	cmpl   $0x0,0x180784fa(%rip)        # 0x18078501
   7:	75 27                	jne    0x30
   9:	90                   	nop
   a:	e8 a2 ae 1d 03       	call   0x31daeb1
   f:	85 c0                	test   %eax,%eax
  11:	74 1c                	je     0x2f
  13:	83 3d eb fd 0d 0e 00 	cmpl   $0x0,0xe0dfdeb(%rip)        # 0xe0dfe05
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d 3e 48 11 0e 	lea    0xe11483e(%rip),%rdi        # 0xe114861
  23:	48 c7 c6 d4 f6 99 8d 	mov    $0xffffffff8d99f6d4,%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)