dccp_invalid_packet: P.type (REQUEST) not Data || [Data]Ack, while P.X == 0 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: 8161 Comm: kworker/u5:5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 new mount options do not match the existing superblock, will be ignored Workqueue: hci6 hci_cmd_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 assign_lock_key kernel/locking/lockdep.c:728 [inline] register_lock_class+0xe82/0x11c0 kernel/locking/lockdep.c:754 __lock_acquire+0x17d/0x3ff0 kernel/locking/lockdep.c:3304 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] hci_uart_send_frame+0x90/0x4f0 drivers/bluetooth/hci_ldisc.c:287 hci_send_frame+0x1b3/0x370 net/bluetooth/hci_core.c:3496 hci_cmd_work+0x210/0x360 net/bluetooth/hci_core.c:4421 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Bluetooth: hci6: sending frame failed (-49) kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 14635 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 RIP: 0010:__wake_up_common+0xdf/0x650 kernel/sched/wait.c:85 Code: 05 00 00 4c 8b 43 38 49 83 e8 18 49 8d 78 18 48 3b 3c 24 0f 84 6a 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 3e 05 00 00 49 8b 40 18 89 54 24 10 31 db 48 bd RSP: 0018:ffff88809e68f650 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff8880992243f8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 1ffffffff148be2c RDI: 0000000000000000 RBP: 0000000000000003 R08: ffffffffffffffe8 R09: ffff88809e68f6f0 R10: ffff8880992243fb R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f83c02f8700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe11baae718 CR3: 00000000989f4000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __wake_up_common_lock+0xcd/0x170 kernel/sched/wait.c:121 rcu_sync_enter+0x1bc/0x300 kernel/rcu/sync.c:133 percpu_down_write+0x59/0x3f0 kernel/locking/percpu-rwsem.c:143 hci_uart_tty_close+0x186/0x2e0 drivers/bluetooth/hci_ldisc.c:544 tty_ldisc_close+0xa2/0xd0 drivers/tty/tty_ldisc.c:493 tty_ldisc_kill drivers/tty/tty_ldisc.c:639 [inline] tty_ldisc_release+0xf5/0x440 drivers/tty/tty_ldisc.c:806 tty_release_struct+0x20/0xe0 drivers/tty/tty_io.c:1611 tty_release+0xc70/0x1210 drivers/tty/tty_io.c:1784 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 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+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f83c1983109 Code: Bad RIP value. RSP: 002b:00007f83c02f8168 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 000000000000006b RBX: 00007f83c1a95f60 RCX: 00007f83c1983109 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 000000002001d000 RBP: 00007f83c19dd05d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe1a70a7cf R14: 00007f83c02f8300 R15: 0000000000022000 Modules linked in: ---[ end trace 39fd7c67fe7286a1 ]--- RIP: 0010:__wake_up_common+0xdf/0x650 kernel/sched/wait.c:85 Code: 05 00 00 4c 8b 43 38 49 83 e8 18 49 8d 78 18 48 3b 3c 24 0f 84 6a 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 3e 05 00 00 49 8b 40 18 89 54 24 10 31 db 48 bd RSP: 0018:ffff88809e68f650 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff8880992243f8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 1ffffffff148be2c RDI: 0000000000000000 RBP: 0000000000000003 R08: ffffffffffffffe8 R09: ffff88809e68f6f0 R10: ffff8880992243fb R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f83c02f8700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f83c19830df CR3: 00000000989f4000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 05 00 00 4c 8b add $0x8b4c0000,%eax 5: 43 38 49 83 rex.XB cmp %cl,-0x7d(%r9) 9: e8 18 49 8d 78 callq 0x788d4926 e: 18 48 3b sbb %cl,0x3b(%rax) 11: 3c 24 cmp $0x24,%al 13: 0f 84 6a 02 00 00 je 0x283 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 f9 mov %rdi,%rcx 26: 48 c1 e9 03 shr $0x3,%rcx * 2a: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) <-- trapping instruction 2e: 0f 85 3e 05 00 00 jne 0x572 34: 49 8b 40 18 mov 0x18(%r8),%rax 38: 89 54 24 10 mov %edx,0x10(%rsp) 3c: 31 db xor %ebx,%ebx 3e: 48 rex.W 3f: bd .byte 0xbd