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: 11525 Comm: syz-executor.1 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:ffffc90007eefc78 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814b6ec8 RDX: ffff8880565ea300 RSI: ffffffff814bf443 RDI: 0000000000000005 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff88804a610b5f R10: 000000007fffffff R11: 0000000000000000 R12: ffff88804a610b58 R13: 0000000000000000 R14: ffff88809f7d5000 R15: 0000000000000040 FS: 0000000000ed9940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b0a3577ff8 CR3: 00000000a818c000 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 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:216 [inline] __prepare_exit_to_usermode+0x1e9/0x1f0 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: 0033:0x416711 Code: Bad RIP value. RSP: 002b:00007ffc0bbb99d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000416711 RDX: 0000001b33b20000 RSI: 00000000000015d2 RDI: 0000000000000003 RBP: 0000000000000001 R08: 00000000f39755d6 R09: 00000000681310bd R10: 00007ffc0bbb9ac0 R11: 0000000000000293 R12: 000000000078c900 R13: 000000000078c900 R14: ffffffffffffffff R15: 000000000078c04c Modules linked in: ---[ end trace 943918ab55cafbbd ]--- 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:ffffc90007eefc78 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814b6ec8 RDX: ffff8880565ea300 RSI: ffffffff814bf443 RDI: 0000000000000005 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff88804a610b5f R10: 000000007fffffff R11: 0000000000000000 R12: ffff88804a610b58 R13: 0000000000000000 R14: ffff88809f7d5000 R15: 0000000000000040 FS: 0000000000ed9940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b0a3577ff8 CR3: 00000000a818c000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400