Warning: Permanently added '10.128.0.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.410768][ T6535] general protection fault, probably for non-canonical address 0xdffffc0000000023: 0000 [#1] PREEMPT SMP KASAN [ 76.422497][ T6535] KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f] [ 76.430885][ T6535] CPU: 0 PID: 6535 Comm: syz-executor106 Not tainted 5.14.0-rc6-next-20210820-syzkaller #0 [ 76.440837][ T6535] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.450894][ T6535] RIP: 0010:destroy_workqueue+0x2e/0x810 [ 76.456515][ T6535] Code: 49 89 fe 41 55 41 54 55 53 48 83 ec 18 e8 9a c5 29 00 49 8d be 18 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 39 07 00 00 49 8b 9e 18 01 00 00 48 85 db 74 19 [ 76.476102][ T6535] RSP: 0018:ffffc90002c9fa28 EFLAGS: 00010202 [ 76.482151][ T6535] RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 0000000000000000 [ 76.490620][ T6535] RDX: 0000000000000023 RSI: ffffffff814cb2f6 RDI: 0000000000000118 [ 76.498570][ T6535] RBP: ffff888019721340 R08: 0000000000000000 R09: 0000000000000000 [ 76.506517][ T6535] R10: ffffffff81a46b48 R11: 0000000000000000 R12: ffff888019720000 [ 76.514466][ T6535] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 76.522418][ T6535] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 76.531333][ T6535] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.537906][ T6535] CR2: 00007fcb4ab1a6c0 CR3: 00000000703da000 CR4: 00000000001506f0 [ 76.545856][ T6535] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.554067][ T6535] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.562024][ T6535] Call Trace: [ 76.565292][ T6535] hci_release_dev+0x125/0xb70 [ 76.570118][ T6535] ? devres_release_all+0x1b4/0x240 [ 76.575316][ T6535] ? hci_bdaddr_list_clear+0x200/0x200 [ 76.580778][ T6535] ? kfree+0x39b/0x540 [ 76.585008][ T6535] ? devm_krealloc+0x530/0x530 [ 76.589777][ T6535] ? try_to_grab_pending+0xd0/0xd0 [ 76.594883][ T6535] ? trace_hardirqs_on+0x5b/0x1c0 [ 76.599903][ T6535] bt_host_release+0x15/0x20 [ 76.604501][ T6535] ? __match_tty+0xa0/0xa0 [ 76.608904][ T6535] device_release+0xa3/0x240 [ 76.613496][ T6535] kobject_put+0x1d0/0x540 [ 76.617898][ T6535] put_device+0x1b/0x30 [ 76.622039][ T6535] hci_uart_tty_close+0x1e4/0x2a0 [ 76.627050][ T6535] ? hci_uart_close+0x70/0x70 [ 76.631716][ T6535] tty_ldisc_close+0x114/0x1a0 [ 76.636468][ T6535] tty_ldisc_kill+0x94/0x150 [ 76.641048][ T6535] tty_ldisc_release+0xe3/0x2a0 [ 76.645889][ T6535] tty_release_struct+0x24/0xf0 [ 76.650726][ T6535] tty_release+0xc70/0x1200 [ 76.655225][ T6535] __fput+0x288/0x9f0 [ 76.659187][ T6535] ? tty_release_struct+0xf0/0xf0 [ 76.664191][ T6535] ? _raw_spin_unlock_irq+0x1f/0x40 [ 76.669382][ T6535] task_work_run+0xdd/0x1a0 [ 76.673879][ T6535] do_exit+0xbae/0x2a30 [ 76.678104][ T6535] ? lock_downgrade+0x6e0/0x6e0 [ 76.682935][ T6535] ? mm_update_next_owner+0x7b0/0x7b0 [ 76.688290][ T6535] do_group_exit+0x129/0x310 [ 76.692866][ T6535] ? syscall_enter_from_user_mode+0x25/0x80 [ 76.698745][ T6535] __x64_sys_exit_group+0x3a/0x50 [ 76.703768][ T6535] do_syscall_64+0x39/0xb0 [ 76.708185][ T6535] ? asm_exc_page_fault+0x8/0x30 [ 76.713103][ T6535] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 76.718979][ T6535] RIP: 0033:0x43da49 [ 76.722859][ T6535] Code: Unable to access opcode bytes at RIP 0x43da1f. [ 76.729945][ T6535] RSP: 002b:00007ffff8f5fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 76.738581][ T6535] RAX: ffffffffffffffda RBX: 00000000004ae230 RCX: 000000000043da49 [ 76.746538][ T6535] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 76.754489][ T6535] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000400488 [ 76.762453][ T6535] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004ae230 [ 76.770414][ T6535] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 76.778371][ T6535] Modules linked in: [ 76.783409][ T6535] ---[ end trace f0da897eafa18aaf ]--- [ 76.788864][ T6535] RIP: 0010:destroy_workqueue+0x2e/0x810 [ 76.794660][ T6535] Code: 49 89 fe 41 55 41 54 55 53 48 83 ec 18 e8 9a c5 29 00 49 8d be 18 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 39 07 00 00 49 8b 9e 18 01 00 00 48 85 db 74 19 [ 76.814420][ T6535] RSP: 0018:ffffc90002c9fa28 EFLAGS: 00010202 [ 76.820494][ T6535] RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 0000000000000000 [ 76.828788][ T6535] RDX: 0000000000000023 RSI: ffffffff814cb2f6 RDI: 0000000000000118 [ 76.837265][ T6535] RBP: ffff888019721340 R08: 0000000000000000 R09: 0000000000000000 [ 76.845360][ T6535] R10: ffffffff81a46b48 R11: 0000000000000000 R12: ffff888019720000 [ 76.853376][ T6535] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 76.861383][ T6535] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 76.870322][ T6535] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.876924][ T6535] CR2: 00007fcd198cf000 CR3: 0000000070e54000 CR4: 00000000001506f0 [ 76.885021][ T6535] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.893052][ T6535] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.901024][ T6535] Kernel panic - not syncing: Fatal exception [ 76.908384][ T6535] Kernel Offset: disabled [ 76.912690][ T6535] Rebooting in 86400 seconds..