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: 4133 Comm: kworker/1:8 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events p9_write_work
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 assign_lock_key+0x1e4/0x1f0 kernel/locking/lockdep.c:937
 register_lock_class+0x148/0x6a4 kernel/locking/lockdep.c:1250
 __lock_acquire+0x184/0x7638 kernel/locking/lockdep.c:4891
 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xc4/0x14c kernel/locking/spinlock.c:162
 gsmld_write+0x60/0x164 drivers/tty/n_gsm.c:2983
 do_tty_write drivers/tty/tty_io.c:1038 [inline]
 file_tty_write+0x44c/0x758 drivers/tty/tty_io.c:1110
 tty_write+0x48/0x58 drivers/tty/tty_io.c:1131
 __kernel_write+0x488/0x8b8 fs/read_write.c:539
 kernel_write+0xe0/0x1ec fs/read_write.c:568
 p9_fd_write net/9p/trans_fd.c:436 [inline]
 p9_write_work+0x488/0xcfc net/9p/trans_fd.c:487
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870