INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 1 PID: 4525 Comm: kworker/1:19 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: events p9_write_work
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 assign_lock_key+0x1ec/0x200 kernel/locking/lockdep.c:937
 register_lock_class+0x21d/0x880 kernel/locking/lockdep.c:1250
 __lock_acquire+0x16f/0x7b50 kernel/locking/lockdep.c:4891
 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:162
 gsmld_write+0x57/0x120 drivers/tty/n_gsm.c:3138
 do_tty_write drivers/tty/tty_io.c:1038 [inline]
 file_tty_write+0x50c/0x8a0 drivers/tty/tty_io.c:1110
 __kernel_write+0x522/0x980 fs/read_write.c:539
 kernel_write+0xcd/0x1f0 fs/read_write.c:568
 p9_fd_write net/9p/trans_fd.c:436 [inline]
 p9_write_work+0x574/0xce0 net/9p/trans_fd.c:487
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>