Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 72.262545][ T8467] general protection fault, probably for non-canonical address 0xdffffc0000000023: 0000 [#1] PREEMPT SMP KASAN [ 72.274547][ T8467] KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f] [ 72.283037][ T8467] CPU: 1 PID: 8467 Comm: syz-executor744 Not tainted 5.14.0-rc3-next-20210728-syzkaller #0 [ 72.293616][ T8467] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.303753][ T8467] RIP: 0010:destroy_workqueue+0x2e/0x800 [ 72.309398][ T8467] Code: 49 89 fe 41 55 41 54 55 53 48 83 ec 08 e8 aa 5c 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 2e 07 00 00 49 8b 9e 18 01 00 00 48 85 db 74 19 [ 72.329288][ T8467] RSP: 0018:ffffc90009577a98 EFLAGS: 00010202 [ 72.335392][ T8467] RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 0000000000000000 [ 72.343392][ T8467] RDX: 0000000000000023 RSI: ffffffff814c5bc6 RDI: 0000000000000118 [ 72.351352][ T8467] RBP: ffff8880131ad340 R08: 0000000000000000 R09: 0000000000000000 [ 72.359634][ T8467] R10: ffffffff81a39748 R11: 0000000000000000 R12: ffff8880131ac000 [ 72.367601][ T8467] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 72.375599][ T8467] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 72.384606][ T8467] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.391458][ T8467] CR2: 0000000000480da8 CR3: 000000000b68e000 CR4: 00000000001506e0 [ 72.399525][ T8467] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.407487][ T8467] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.415724][ T8467] Call Trace: [ 72.419089][ T8467] hci_release_dev+0x125/0xb70 [ 72.423853][ T8467] ? hci_bdaddr_list_clear+0x200/0x200 [ 72.429296][ T8467] ? kfree+0x226/0x650 [ 72.433363][ T8467] ? devm_krealloc+0x530/0x530 [ 72.438123][ T8467] ? hci_uart_tty_close+0x17c/0x2a0 [ 72.443483][ T8467] bt_host_release+0x15/0x20 [ 72.448076][ T8467] ? __match_tty+0x90/0x90 [ 72.452570][ T8467] device_release+0x9f/0x240 [ 72.457165][ T8467] kobject_put+0x1c8/0x540 [ 72.461578][ T8467] put_device+0x1b/0x30 [ 72.465829][ T8467] hci_uart_tty_close+0x1e4/0x2a0 [ 72.470836][ T8467] ? hci_uart_close+0x70/0x70 [ 72.475512][ T8467] tty_ldisc_close+0x110/0x190 [ 72.480305][ T8467] tty_ldisc_kill+0x94/0x150 [ 72.484896][ T8467] tty_ldisc_release+0xe3/0x2a0 [ 72.489762][ T8467] tty_release_struct+0x20/0xe0 [ 72.494613][ T8467] tty_release+0xc70/0x1200 [ 72.499215][ T8467] __fput+0x288/0x920 [ 72.503489][ T8467] ? tty_release_struct+0xe0/0xe0 [ 72.508521][ T8467] task_work_run+0xdd/0x1a0 [ 72.513110][ T8467] do_exit+0xbd4/0x2a60 [ 72.517283][ T8467] ? __context_tracking_exit+0xb8/0xe0 [ 72.523008][ T8467] ? lock_downgrade+0x6e0/0x6e0 [ 72.527855][ T8467] ? lock_downgrade+0x6e0/0x6e0 [ 72.532690][ T8467] ? mm_update_next_owner+0x7a0/0x7a0 [ 72.538329][ T8467] do_group_exit+0x125/0x310 [ 72.542903][ T8467] __x64_sys_exit_group+0x3a/0x50 [ 72.547923][ T8467] do_syscall_64+0x35/0xb0 [ 72.552425][ T8467] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 72.558579][ T8467] RIP: 0033:0x43da49 [ 72.562492][ T8467] Code: Unable to access opcode bytes at RIP 0x43da1f. [ 72.569337][ T8467] RSP: 002b:00007ffc6bba0fb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 72.577826][ T8467] RAX: ffffffffffffffda RBX: 00000000004ae230 RCX: 000000000043da49 [ 72.585912][ T8467] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 72.594438][ T8467] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000400488 [ 72.602495][ T8467] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004ae230 [ 72.610543][ T8467] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 72.618518][ T8467] Modules linked in: [ 72.623858][ T8467] ---[ end trace 516dd52cdf23e662 ]--- [ 72.629391][ T8467] RIP: 0010:destroy_workqueue+0x2e/0x800 [ 72.635040][ T8467] Code: 49 89 fe 41 55 41 54 55 53 48 83 ec 08 e8 aa 5c 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 2e 07 00 00 49 8b 9e 18 01 00 00 48 85 db 74 19 [ 72.654931][ T8467] RSP: 0018:ffffc90009577a98 EFLAGS: 00010202 [ 72.661420][ T8467] RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 0000000000000000 [ 72.670033][ T8467] RDX: 0000000000000023 RSI: ffffffff814c5bc6 RDI: 0000000000000118 [ 72.678213][ T8467] RBP: ffff8880131ad340 R08: 0000000000000000 R09: 0000000000000000 [ 72.686201][ T8467] R10: ffffffff81a39748 R11: 0000000000000000 R12: ffff8880131ac000 [ 72.694249][ T8467] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 72.702562][ T8467] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 72.711562][ T8467] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.718187][ T8467] CR2: 0000000000480da8 CR3: 000000000b68e000 CR4: 00000000001506e0 [ 72.726433][ T8467] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.734702][ T8467] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.744040][ T8467] Kernel panic - not syncing: Fatal exception [ 72.751989][ T8467] Kernel Offset: disabled [ 72.756328][ T8467] Rebooting in 86400 seconds..