INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 0 PID: 12220 Comm: syz-executor.2 Not tainted 5.6.0-rc3-syzkaller #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+0x197/0x210 lib/dump_stack.c:118
 assign_lock_key kernel/locking/lockdep.c:880 [inline]
 register_lock_class+0x179e/0x1850 kernel/locking/lockdep.c:1189
 __lock_acquire+0xf4/0x4a00 kernel/locking/lockdep.c:3836
 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484
 percpu_down_read include/linux/percpu-rwsem.h:40 [inline]
 hci_uart_flush+0x110/0x510 drivers/bluetooth/hci_ldisc.c:241
 hci_uart_close drivers/bluetooth/hci_ldisc.c:267 [inline]
 hci_uart_tty_close+0x8e/0x280 drivers/bluetooth/hci_ldisc.c:534
 tty_ldisc_close.isra.0+0x119/0x1a0 drivers/tty/tty_ldisc.c:489
 tty_ldisc_kill+0x9c/0x160 drivers/tty/tty_ldisc.c:637
 tty_ldisc_release+0xe9/0x2b0 drivers/tty/tty_ldisc.c:809
 tty_release_struct+0x1b/0x50 drivers/tty/tty_io.c:1616
 tty_release+0xbcb/0xe90 drivers/tty/tty_io.c:1789
 __fput+0x2ff/0x890 fs/file_table.c:280
 ____fput+0x16/0x20 fs/file_table.c:313
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 get_signal+0x206e/0x24f0 kernel/signal.c:2528
 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:813
 exit_to_usermode_loop+0x286/0x380 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x676/0x790 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c449
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:00007fab3760fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007fab376106d4 RCX: 000000000045c449
RDX: 0000000000000004 RSI: 00000000400455c8 RDI: 0000000000000003
RBP: 000000000076c060 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000367 R14: 00000000004c596f R15: 000000000076c06c
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 12220 Comm: syz-executor.2 Not tainted 5.6.0-rc3-syzkaller #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:86
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 0d 05 00 00 49 8b 40 18 89 55 b0 31 db 49 bc 00
RSP: 0018:ffffc90005297818 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff8880915fd8b8 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 1ffffffff154bcba RDI: 0000000000000000
RBP: ffffc90005297870 R08: ffffffffffffffe8 R09: 0000000000000000
R10: fffff52000a52efe R11: 0000000000000003 R12: ffff8880915fd900
R13: ffff8880915fd8b0 R14: 0000000000000000 R15: ffff8880915fd8b8
FS:  00007fab37610700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000b70004 CR3: 000000009eb03000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __wake_up_locked+0x11/0x20 kernel/sched/wait.c:151
 rcu_sync_func+0x16f/0x200 kernel/rcu/sync.c:87
 rcu_sync_enter+0x158/0x310 kernel/rcu/sync.c:150
 percpu_down_write+0x61/0x3f0 kernel/locking/percpu-rwsem.c:146
 hci_uart_tty_close+0x154/0x280 drivers/bluetooth/hci_ldisc.c:537
 tty_ldisc_close.isra.0+0x119/0x1a0 drivers/tty/tty_ldisc.c:489
 tty_ldisc_kill+0x9c/0x160 drivers/tty/tty_ldisc.c:637
 tty_ldisc_release+0xe9/0x2b0 drivers/tty/tty_ldisc.c:809
 tty_release_struct+0x1b/0x50 drivers/tty/tty_io.c:1616
 tty_release+0xbcb/0xe90 drivers/tty/tty_io.c:1789
 __fput+0x2ff/0x890 fs/file_table.c:280
 ____fput+0x16/0x20 fs/file_table.c:313
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 get_signal+0x206e/0x24f0 kernel/signal.c:2528
 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:813
 exit_to_usermode_loop+0x286/0x380 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x676/0x790 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c449
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:00007fab3760fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007fab376106d4 RCX: 000000000045c449
RDX: 0000000000000004 RSI: 00000000400455c8 RDI: 0000000000000003
RBP: 000000000076c060 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000367 R14: 00000000004c596f R15: 000000000076c06c
Modules linked in:
---[ end trace 9495f665881b7676 ]---
RIP: 0010:__wake_up_common+0xdf/0x610 kernel/sched/wait.c:86
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 0d 05 00 00 49 8b 40 18 89 55 b0 31 db 49 bc 00
RSP: 0018:ffffc90005297818 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff8880915fd8b8 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 1ffffffff154bcba RDI: 0000000000000000
RBP: ffffc90005297870 R08: ffffffffffffffe8 R09: 0000000000000000
R10: fffff52000a52efe R11: 0000000000000003 R12: ffff8880915fd900
R13: ffff8880915fd8b0 R14: 0000000000000000 R15: ffff8880915fd8b8
FS:  00007fab37610700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000b70004 CR3: 000000009eb03000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400