[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.40' (ECDSA) to the list of known hosts. syzkaller login: [ 48.289508][ T8361] IPVS: ftp: loaded support on port[0] = 21 executing program [ 48.383569][ T8361] list_del corruption. prev->next should be ffff888018a74c68, but was ffff88801263b440 [ 48.393835][ T8361] ------------[ cut here ]------------ [ 48.399330][ T8361] kernel BUG at lib/list_debug.c:53! [ 48.404935][ T8361] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 48.411019][ T8361] CPU: 0 PID: 8361 Comm: syz-executor523 Not tainted 5.12.0-rc6-syzkaller #0 [ 48.419759][ T8361] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.429806][ T8361] RIP: 0010:__list_del_entry_valid+0xe1/0x100 [ 48.435874][ T8361] Code: 72 b0 87 fd 0f 0b 48 c7 c7 80 a0 11 8a 4c 89 f6 31 c0 e8 5f b0 87 fd 0f 0b 48 c7 c7 e0 a0 11 8a 4c 89 f6 31 c0 e8 4c b0 87 fd <0f> 0b 48 c7 c7 40 a1 11 8a 4c 89 f6 31 c0 e8 39 b0 87 fd 0f 0b 66 [ 48.455459][ T8361] RSP: 0000:ffffc900010bf9c8 EFLAGS: 00010246 [ 48.461519][ T8361] RAX: 0000000000000054 RBX: ffff88801191b468 RCX: ae24f9509f195200 [ 48.469481][ T8361] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 48.477430][ T8361] RBP: 0000000000000000 R08: ffffffff8160b612 R09: ffffed1017385fe8 [ 48.485388][ T8361] R10: ffffed1017385fe8 R11: 0000000000000000 R12: dffffc0000000000 [ 48.493352][ T8361] R13: ffff888018a74c68 R14: ffff888018a74c68 R15: ffff88801191b468 [ 48.501323][ T8361] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 48.510234][ T8361] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.516810][ T8361] CR2: 00007f9f12a2cbb0 CR3: 00000000213fc000 CR4: 00000000001506f0 [ 48.524772][ T8361] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.532811][ T8361] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.540776][ T8361] Call Trace: [ 48.544044][ T8361] klist_dec_and_del+0x9c/0x430 [ 48.548880][ T8361] ? klist_children_get+0x50/0x50 [ 48.553884][ T8361] klist_del+0xa0/0x100 [ 48.558026][ T8361] device_del+0x29e/0xa90 [ 48.562337][ T8361] ? device_find_child+0x122/0x150 [ 48.567442][ T8361] hci_conn_del_sysfs+0xeb/0x190 [ 48.572366][ T8361] hci_conn_cleanup+0x495/0x640 [ 48.577198][ T8361] hci_conn_del+0x2ae/0x3b0 [ 48.581681][ T8361] hci_conn_hash_flush+0x1bd/0x240 [ 48.586781][ T8361] hci_dev_do_close+0xa04/0xfe0 [ 48.591611][ T8361] hci_unregister_dev+0x301/0x18a0 [ 48.596706][ T8361] vhci_release+0x73/0xc0 [ 48.601017][ T8361] ? vhci_open+0x290/0x290 [ 48.605412][ T8361] __fput+0x352/0x7b0 [ 48.609494][ T8361] task_work_run+0x146/0x1c0 [ 48.614061][ T8361] do_exit+0x6b2/0x2290 [ 48.618195][ T8361] ? __context_tracking_exit+0x7a/0xd0 [ 48.623635][ T8361] do_group_exit+0x168/0x2d0 [ 48.628204][ T8361] ? syscall_enter_from_user_mode+0x2e/0x1c0 [ 48.634298][ T8361] __do_sys_exit_group+0x13/0x20 [ 48.639213][ T8361] __se_sys_exit_group+0x10/0x10 [ 48.644167][ T8361] __x64_sys_exit_group+0x37/0x40 [ 48.649180][ T8361] do_syscall_64+0x2d/0x70 [ 48.653580][ T8361] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 48.659453][ T8361] RIP: 0033:0x4443c9 [ 48.663327][ T8361] Code: Unable to access opcode bytes at RIP 0x44439f. [ 48.670147][ T8361] RSP: 002b:00007ffff06d1d58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 48.678539][ T8361] RAX: ffffffffffffffda RBX: 00000000004cb370 RCX: 00000000004443c9 [ 48.686489][ T8361] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 48.694438][ T8361] RBP: 0000000000000001 R08: ffffffffffffffb8 R09: 000000ff004c5fe0 [ 48.702388][ T8361] R10: 00007ffff06d1820 R11: 0000000000000246 R12: 00000000004cb370 [ 48.710341][ T8361] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 48.718295][ T8361] Modules linked in: [ 48.722252][ T8361] ---[ end trace d8c06b4c2761f315 ]--- [ 48.727705][ T8361] RIP: 0010:__list_del_entry_valid+0xe1/0x100 [ 48.734116][ T8361] Code: 72 b0 87 fd 0f 0b 48 c7 c7 80 a0 11 8a 4c 89 f6 31 c0 e8 5f b0 87 fd 0f 0b 48 c7 c7 e0 a0 11 8a 4c 89 f6 31 c0 e8 4c b0 87 fd <0f> 0b 48 c7 c7 40 a1 11 8a 4c 89 f6 31 c0 e8 39 b0 87 fd 0f 0b 66 [ 48.753759][ T8361] RSP: 0000:ffffc900010bf9c8 EFLAGS: 00010246 [ 48.759872][ T8361] RAX: 0000000000000054 RBX: ffff88801191b468 RCX: ae24f9509f195200 [ 48.767837][ T8361] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 48.775819][ T8361] RBP: 0000000000000000 R08: ffffffff8160b612 R09: ffffed1017385fe8 [ 48.783823][ T8361] R10: ffffed1017385fe8 R11: 0000000000000000 R12: dffffc0000000000 [ 48.791824][ T8361] R13: ffff888018a74c68 R14: ffff888018a74c68 R15: ffff88801191b468 [ 48.799795][ T8361] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 48.808758][ T8361] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.815359][ T8361] CR2: 00007f9f12a2cbb0 CR3: 000000000c48e000 CR4: 00000000001506f0 [ 48.823380][ T8361] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.831377][ T8361] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.839435][ T8361] Kernel panic - not syncing: Fatal exception [ 48.846195][ T8361] Kernel Offset: disabled [ 48.850513][ T8361] Rebooting in 86400 seconds..