=============================
[ BUG: Invalid wait context ]
syzkaller #0 Tainted: G             L     
-----------------------------
ksoftirqd/1/23 is trying to lock:
ffff888054b61be8 (&dev->io_mutex){+.+.}-{4:4}, at: spin_lock include/linux/spinlock.h:342 [inline]
ffff888054b61be8 (&dev->io_mutex){+.+.}-{4:4}, at: tcp_tsq_handler+0x1d/0x200 net/ipv4/tcp_output.c:1291
other info that might help us debug this:
context-{3:3}
2 locks held by ksoftirqd/1/23:
 #0: ffff88801bc09540 ((wq_completion)events_bh){+.-.}-{0:0}, at: process_one_work+0x12b1/0x1940 kernel/workqueue.c:3297
 #1: ffffc900001d7b80 ((work_completion)(&tsq->work)){+.-.}-{0:0}, at: process_one_work+0x988/0x1940 kernel/workqueue.c:3298
stack backtrace:
CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4830 [inline]
 check_wait_context kernel/locking/lockdep.c:4902 [inline]
 __lock_acquire+0xf75/0x1a40 kernel/locking/lockdep.c:5187
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
 __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+0x1d/0x200 net/ipv4/tcp_output.c:1291
 tcp_tsq_workfn+0x2b2/0x560 net/ipv4/tcp_output.c:1325
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 bh_worker+0x646/0x890 kernel/workqueue.c:3708
 workqueue_softirq_action+0x142/0x1a0 kernel/workqueue.c:3736
 tasklet_action+0x14/0x70 kernel/softirq.c:965
 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1076 [inline]
 run_ksoftirqd+0x38/0x60 kernel/softirq.c:1068
 smpboot_thread_fn+0x3d3/0xaa0 kernel/smpboot.c:160
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>