loop3: detected capacity change from 0 to 512
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: 0 PID: 5917 Comm: syz.3.352 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 assign_lock_key+0x19c/0x1a8 kernel/locking/lockdep.c:937
 register_lock_class+0x1ac/0x694 kernel/locking/lockdep.c:1250
 __lock_acquire+0x150/0x651c kernel/locking/lockdep.c:4891
 lock_acquire+0x1f4/0x620 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_wakeup+0x74/0x2c0 drivers/tty/n_gsm.c:2925
 tty_wakeup+0xac/0xec drivers/tty/tty_io.c:534
 tty_port_default_wakeup+0xb8/0x138 drivers/tty/tty_port.c:51
 tty_port_tty_wakeup+0x64/0x78 drivers/tty/tty_port.c:389
 uart_flush_buffer+0x250/0x348 drivers/tty/serial/serial_core.c:646
 tty_driver_flush_buffer+0x6c/0x88 drivers/tty/tty_ioctl.c:95
 tty_ldisc_hangup+0xd8/0x4b4 drivers/tty/tty_ldisc.c:720
 __tty_hangup+0x3f0/0x70c drivers/tty/tty_io.c:639
 tty_vhangup drivers/tty/tty_io.c:711 [inline]
 tty_ioctl+0x448/0xde0 drivers/tty/tty_io.c:2750
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584