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: 0 PID: 5139 Comm: syz-executor.3 Not tainted 5.4.249-syzkaller-00008-ga1b9dbe5628a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 RIP: 0010:__wake_up_common kernel/sched/wait.c:81 [inline] RIP: 0010:__wake_up_locked+0x5d/0x110 kernel/sched/wait.c:151 Code: e8 58 10 4a 00 48 ba 00 00 00 00 00 fc ff df 4d 8b 34 24 4d 39 e6 0f 84 b1 00 00 00 4c 89 f3 49 8d 6e e8 4c 89 f0 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 df e8 25 10 4a 00 48 ba 00 00 00 00 00 fc RSP: 0018:ffff8881ab597900 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff8881b15d8898 RBP: ffffffffffffffe8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881b15d88a0 R13: ffff8881b15d88b0 R14: 0000000000000000 R15: 0000000000000001 FS: 00007ff1bea7d6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200e0030 CR3: 00000001e7c5a000 CR4: 00000000003426b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_sync_func+0xaa/0x210 kernel/rcu/sync.c:87 rcu_sync_enter+0x1ec/0x330 kernel/rcu/sync.c:150 percpu_down_write+0x72/0x350 kernel/locking/percpu-rwsem.c:146 hci_uart_tty_close+0x11e/0x220 drivers/bluetooth/hci_ldisc.c:536 tty_ldisc_close drivers/tty/tty_ldisc.c:494 [inline] tty_ldisc_kill+0x100/0x220 drivers/tty/tty_ldisc.c:642 tty_ldisc_hangup+0x39d/0x4a0 drivers/tty/tty_ldisc.c:761 __tty_hangup+0x62d/0x8a0 drivers/tty/tty_io.c:624 tty_vhangup drivers/tty/tty_io.c:697 [inline] tty_ioctl+0x639/0xcb0 drivers/tty/tty_io.c:2600 do_vfs_ioctl+0x742/0x1720 fs/ioctl.c:47 ksys_ioctl fs/ioctl.c:742 [inline] __do_sys_ioctl fs/ioctl.c:749 [inline] __se_sys_ioctl fs/ioctl.c:747 [inline] __x64_sys_ioctl+0xd4/0x110 fs/ioctl.c:747 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Modules linked in: ---[ end trace ac071059c23b4b7f ]--- RIP: 0010:__wake_up_common kernel/sched/wait.c:81 [inline] RIP: 0010:__wake_up_locked+0x5d/0x110 kernel/sched/wait.c:151 Code: e8 58 10 4a 00 48 ba 00 00 00 00 00 fc ff df 4d 8b 34 24 4d 39 e6 0f 84 b1 00 00 00 4c 89 f3 49 8d 6e e8 4c 89 f0 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 df e8 25 10 4a 00 48 ba 00 00 00 00 00 fc RSP: 0018:ffff8881ab597900 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff8881b15d8898 RBP: ffffffffffffffe8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881b15d88a0 R13: ffff8881b15d88b0 R14: 0000000000000000 R15: 0000000000000001 FS: 00007ff1bea7d6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200e0030 CR3: 00000001e7c5a000 CR4: 00000000003426b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 58 10 4a 00 call 0x4a105d 5: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx c: fc ff df f: 4d 8b 34 24 mov (%r12),%r14 13: 4d 39 e6 cmp %r12,%r14 16: 0f 84 b1 00 00 00 je 0xcd 1c: 4c 89 f3 mov %r14,%rbx 1f: 49 8d 6e e8 lea -0x18(%r14),%rbp 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction 2e: 74 12 je 0x42 30: 48 89 df mov %rbx,%rdi 33: e8 25 10 4a 00 call 0x4a105d 38: 48 rex.W 39: ba 00 00 00 00 mov $0x0,%edx 3e: 00 fc add %bh,%ah