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: 20778 Comm: syz-executor.4 Not tainted 5.8.0-rc2-next-20200626-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__queue_work+0x39a/0xff0 kernel/workqueue.c:1434 Code: 0a 9e 06 48 89 d8 48 c1 e8 03 80 3c 28 00 0f 85 f6 0b 00 00 48 8b 3b e8 e4 08 9e 06 eb 26 e8 bd f5 27 00 48 89 d8 48 c1 e8 03 <80> 3c 28 00 0f 85 ae 0b 00 00 4c 8b 2b e8 a4 f5 27 00 4c 89 ef e8 RSP: 0018:ffffc9000171f8f0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814b6ec8 RDX: ffff8880a93b84c0 RSI: ffffffff814bf443 RDI: 0000000000000005 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff8880a78b8b5f R10: 000000007fffffff R11: 0000000000000000 R12: ffff8880a78b8b58 R13: 0000000000000000 R14: ffff88804b61b000 R15: 0000000000000040 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556c7672d500 CR3: 0000000096477000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: queue_work_on+0x18b/0x200 kernel/workqueue.c:1518 queue_work include/linux/workqueue.h:507 [inline] hci_update_background_scan net/bluetooth/hci_request.h:115 [inline] hci_adv_monitors_clear+0x150/0x1d0 net/bluetooth/hci_core.c:3009 hci_unregister_dev+0x417/0xe20 net/bluetooth/hci_core.c:3810 vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:340 __fput+0x33c/0x880 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:123 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xb72/0x2a40 kernel/exit.c:806 do_group_exit+0x125/0x310 kernel/exit.c:904 get_signal+0x428/0x1fc0 kernel/signal.c:2739 do_signal+0x82/0x2520 arch/x86/kernel/signal.c:810 exit_to_usermode_loop arch/x86/entry/common.c:212 [inline] __prepare_exit_to_usermode+0x156/0x1f0 arch/x86/entry/common.c:246 do_syscall_64+0x6c/0xe0 arch/x86/entry/common.c:368 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb19 Code: Bad RIP value. RSP: 002b:00007f496cf10cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000078bf08 RCX: 000000000045cb19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000078bf08 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c R13: 00007fff1e0b60ef R14: 00007f496cf119c0 R15: 000000000078bf0c Modules linked in: ---[ end trace 403781ee3c310659 ]--- RIP: 0010:__queue_work+0x39a/0xff0 kernel/workqueue.c:1434 Code: 0a 9e 06 48 89 d8 48 c1 e8 03 80 3c 28 00 0f 85 f6 0b 00 00 48 8b 3b e8 e4 08 9e 06 eb 26 e8 bd f5 27 00 48 89 d8 48 c1 e8 03 <80> 3c 28 00 0f 85 ae 0b 00 00 4c 8b 2b e8 a4 f5 27 00 4c 89 ef e8 RSP: 0018:ffffc9000171f8f0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814b6ec8 RDX: ffff8880a93b84c0 RSI: ffffffff814bf443 RDI: 0000000000000005 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff8880a78b8b5f R10: 000000007fffffff R11: 0000000000000000 R12: ffff8880a78b8b58 R13: 0000000000000000 R14: ffff88804b61b000 R15: 0000000000000040 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556c7672d500 CR3: 0000000096477000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400