INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 0 PID: 14202 Comm: syz-executor.5 Not tainted 4.19.83 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 assign_lock_key kernel/locking/lockdep.c:727 [inline]
 register_lock_class+0x19b5/0x1cf0 kernel/locking/lockdep.c:753
 __lock_acquire+0x154/0x49c0 kernel/locking/lockdep.c:3299
 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903
 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
 hci_uart_flush+0x110/0x3f0 drivers/bluetooth/hci_ldisc.c:248
 hci_uart_close drivers/bluetooth/hci_ldisc.c:274 [inline]
 hci_uart_tty_close+0x8e/0x250 drivers/bluetooth/hci_ldisc.c:541
 tty_ldisc_close.isra.0+0xaf/0xe0 drivers/tty/tty_ldisc.c:486
 tty_ldisc_kill+0x4b/0xc0 drivers/tty/tty_ldisc.c:632
 tty_ldisc_release+0xc6/0x280 drivers/tty/tty_ldisc.c:799
 tty_release_struct+0x1b/0x50 drivers/tty/tty_io.c:1611
 tty_release+0xbcb/0xe90 drivers/tty/tty_io.c:1784
 __fput+0x2dd/0x8b0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 get_signal+0x1baa/0x1fc0 kernel/signal.c:2385
 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a219
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcc2c737c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000045a219
RDX: 0000000000000002 RSI: 00000000400455c8 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc2c7386d4
R13: 00000000004c3209 R14: 00000000004d73a8 R15: 00000000ffffffff
kobject: '(null)' (0000000015a3143e): kobject_cleanup, parent           (null)
kobject: '(null)' (0000000015a3143e): calling ktype release
kobject: '(null)' (0000000083bdd7d3): kobject_cleanup, parent           (null)
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
kobject: '(null)' (0000000083bdd7d3): calling ktype release
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14202 Comm: syz-executor.5 Not tainted 4.19.83 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__wake_up_common+0xdf/0x610 kernel/sched/wait.c:85
Code: 05 00 00 4c 8b 43 38 49 83 e8 18 49 8d 78 18 48 39 7d d0 0f 84 64 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <80> 3c 01 00 0f 85 0b 05 00 00 49 8b 40 18 89 55 b0 31 db 49 bc 00
RSP: 0018:ffff88807c1776e8 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff88808fe77338 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 1ffffffff1161a30 RDI: 0000000000000000
RBP: ffff88807c177740 R08: ffffffffffffffe8 R09: ffff88807c177798
R10: ffffed1011fcee67 R11: ffff88808fe7733b R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fcc2c738700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002236458 CR3: 00000000a8060000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __wake_up_common_lock+0xe9/0x190 kernel/sched/wait.c:121
 __wake_up+0xe/0x10 kernel/sched/wait.c:145
 rcu_sync_enter+0x1c7/0x310 kernel/rcu/sync.c:133
 percpu_down_write+0x61/0x437 kernel/locking/percpu-rwsem.c:143
 hci_uart_tty_close+0x13a/0x250 drivers/bluetooth/hci_ldisc.c:544
 tty_ldisc_close.isra.0+0xaf/0xe0 drivers/tty/tty_ldisc.c:486
 tty_ldisc_kill+0x4b/0xc0 drivers/tty/tty_ldisc.c:632
 tty_ldisc_release+0xc6/0x280 drivers/tty/tty_ldisc.c:799
 tty_release_struct+0x1b/0x50 drivers/tty/tty_io.c:1611
 tty_release+0xbcb/0xe90 drivers/tty/tty_io.c:1784
 __fput+0x2dd/0x8b0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 get_signal+0x1baa/0x1fc0 kernel/signal.c:2385
 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a219
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcc2c737c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000045a219
RDX: 0000000000000002 RSI: 00000000400455c8 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc2c7386d4
R13: 00000000004c3209 R14: 00000000004d73a8 R15: 00000000ffffffff
Modules linked in:
---[ end trace 927db6fb643f8524 ]---
RIP: 0010:__wake_up_common+0xdf/0x610 kernel/sched/wait.c:85
Code: 05 00 00 4c 8b 43 38 49 83 e8 18 49 8d 78 18 48 39 7d d0 0f 84 64 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <80> 3c 01 00 0f 85 0b 05 00 00 49 8b 40 18 89 55 b0 31 db 49 bc 00
RSP: 0018:ffff88807c1776e8 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff88808fe77338 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 1ffffffff1161a30 RDI: 0000000000000000
RBP: ffff88807c177740 R08: ffffffffffffffe8 R09: ffff88807c177798
R10: ffffed1011fcee67 R11: ffff88808fe7733b R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fcc2c738700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002236458 CR3: 00000000a8060000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400