------------[ 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 hlock_class kernel/locking/lockdep.c:227 [inline], CPU#0: ksoftirqd/0/15
WARNING: kernel/locking/lockdep.c:238 at check_wait_context kernel/locking/lockdep.c:4870 [inline], CPU#0: ksoftirqd/0/15
WARNING: kernel/locking/lockdep.c:238 at __lock_acquire+0x14cd/0x1ec0 kernel/locking/lockdep.c:5204, 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 08/05/2026
RIP: 0010:hlock_class kernel/locking/lockdep.c:238 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:227 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4870 [inline]
RIP: 0010:__lock_acquire+0x14d4/0x1ec0 kernel/locking/lockdep.c:5204
Code: 0c f9 ff ff 48 8d 3d 0b 1d 61 0f 48 c7 c6 cc 38 3c 8e 67 48 0f b9 3a e9 f0 fc ff ff 48 8d 3d 03 1d 61 0f 48 c7 c6 62 54 3d 8e <67> 48 0f b9 3a 44 8b 44 24 18 44 8b 54 24 14 e9 dc fb ff ff 48 8d
RSP: 0018:ffffc90000147820 EFLAGS: 00010046
RAX: 0000000000000001 RBX: ffff88801f293180 RCX: 0000000000000101
RDX: ffff88801f292580 RSI: ffffffff8e3d5462 RDI: ffffffff914821b0
RBP: 0000000000001047 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000001 R12: ffff88801f292580
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888123b69000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6b6921e225 CR3: 000000007c9b1000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 lock_acquire kernel/locking/lockdep.c:5908 [inline]
 lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5865
 __raw_spin_lock include/linux/spinlock_api_smp.h:190 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:173
 spin_lock include/linux/spinlock.h:347 [inline]
 tcp_tsq_handler+0x1d/0x200 net/ipv4/tcp_output.c:1291
 tcp_tsq_workfn+0x2b2/0x560 net/ipv4/tcp_output.c:1325
 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3387
 process_scheduled_works kernel/workqueue.c:3470 [inline]
 bh_worker+0x6a5/0x8f0 kernel/workqueue.c:3773
 workqueue_softirq_action+0x14a/0x1b0 kernel/workqueue.c:3801
 tasklet_action+0x14/0x70 kernel/softirq.c:997
 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
 run_ksoftirqd kernel/softirq.c:1108 [inline]
 run_ksoftirqd+0x38/0x60 kernel/softirq.c:1100
 smpboot_thread_fn+0x3d3/0xab0 kernel/smpboot.c:160
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	ff 48 8d             	decl   -0x73(%rax)
   3:	3d 0b 1d 61 0f       	cmp    $0xf611d0b,%eax
   8:	48 c7 c6 cc 38 3c 8e 	mov    $0xffffffff8e3c38cc,%rsi
   f:	67 48 0f b9 3a       	ud1    (%edx),%rdi
  14:	e9 f0 fc ff ff       	jmp    0xfffffd09
  19:	48 8d 3d 03 1d 61 0f 	lea    0xf611d03(%rip),%rdi        # 0xf611d23
  20:	48 c7 c6 62 54 3d 8e 	mov    $0xffffffff8e3d5462,%rsi
* 27:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2c:	44 8b 44 24 18       	mov    0x18(%rsp),%r8d
  31:	44 8b 54 24 14       	mov    0x14(%rsp),%r10d
  36:	e9 dc fb ff ff       	jmp    0xfffffc17
  3b:	48                   	rex.W
  3c:	8d                   	.byte 0x8d