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: 18722 Comm: syz-executor.0 Not tainted 6.0.0-rc3-syzkaller-16800-g85413d1e802e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call trace:
 dump_backtrace+0x1b0/0x1dc arch/arm64/kernel/stacktrace.c:182
 show_stack+0x2c/0x64 arch/arm64/kernel/stacktrace.c:189
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 assign_lock_key+0x134/0x140 kernel/locking/lockdep.c:979
 register_lock_class+0xc4/0x2f8 kernel/locking/lockdep.c:1292
 __lock_acquire+0xa8/0x30a4 kernel/locking/lockdep.c:4932
 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162
 gsmld_write+0x3c/0xe4 drivers/tty/n_gsm.c:3023
 do_tty_write drivers/tty/tty_io.c:1024 [inline]
 file_tty_write+0x29c/0x484 drivers/tty/tty_io.c:1095
 tty_write+0x2c/0x3c drivers/tty/tty_io.c:1116
 do_iter_write+0x318/0x560 fs/read_write.c:855
 vfs_writev fs/read_write.c:928 [inline]
 do_writev+0x12c/0x234 fs/read_write.c:971
 __do_sys_writev fs/read_write.c:1044 [inline]
 __se_sys_writev fs/read_write.c:1041 [inline]
 __arm64_sys_writev+0x28/0x38 fs/read_write.c:1041
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x154 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642
 el0t_64_sync+0x18c/0x190
BUG: sleeping function called from invalid context at kernel/printk/printk.c:2566
in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 18722, name: syz-executor.0
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
irq event stamp: 250
hardirqs last  enabled at (249): [<ffff800008038c9c>] local_daif_restore arch/arm64/include/asm/daifflags.h:75 [inline]
hardirqs last  enabled at (249): [<ffff800008038c9c>] el0_svc_common+0x40/0x220 arch/arm64/kernel/syscall.c:107
hardirqs last disabled at (250): [<ffff80000c013848>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (250): [<ffff80000c013848>] _raw_spin_lock_irqsave+0xa4/0xb4 kernel/locking/spinlock.c:162
softirqs last  enabled at (200): [<ffff80000a182230>] ppp_unbridge_channels+0xec/0x2a4 drivers/net/ppp/ppp_generic.c:670
softirqs last disabled at (198): [<ffff80000a18216c>] ppp_unbridge_channels+0x28/0x2a4 drivers/net/ppp/ppp_generic.c:667
Preemption disabled at:
[<ffff8000098e416c>] gsmld_write+0x3c/0xe4 drivers/tty/n_gsm.c:3023
CPU: 1 PID: 18722 Comm: syz-executor.0 Not tainted 6.0.0-rc3-syzkaller-16800-g85413d1e802e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call trace:
 dump_backtrace+0x1b0/0x1dc arch/arm64/kernel/stacktrace.c:182
 show_stack+0x2c/0x64 arch/arm64/kernel/stacktrace.c:189
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 __might_resched+0x208/0x218 kernel/sched/core.c:9892
 __might_sleep+0x48/0x78 kernel/sched/core.c:9821
 console_lock+0x28/0xb8 kernel/printk/printk.c:2566
 do_con_write+0x84/0xddc drivers/tty/vt/vt.c:2908
 con_write+0x34/0xb0 drivers/tty/vt/vt.c:3295
 gsmld_write+0xa4/0xe4 drivers/tty/n_gsm.c:3026
 do_tty_write drivers/tty/tty_io.c:1024 [inline]
 file_tty_write+0x29c/0x484 drivers/tty/tty_io.c:1095
 tty_write+0x2c/0x3c drivers/tty/tty_io.c:1116
 do_iter_write+0x318/0x560 fs/read_write.c:855
 vfs_writev fs/read_write.c:928 [inline]
 do_writev+0x12c/0x234 fs/read_write.c:971
 __do_sys_writev fs/read_write.c:1044 [inline]
 __se_sys_writev fs/read_write.c:1041 [inline]
 __arm64_sys_writev+0x28/0x38 fs/read_write.c:1041
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x154 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642
 el0t_64_sync+0x18c/0x190