INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.401492] IPVS: ftp: loaded support on port[0] = 21 [ 28.432394] gfs2: fsid=loop0: Trying to join cluster "lock_nolock", "loop0" [ 28.439587] gfs2: fsid=loop0: Now mounting FS... [ 28.447264] gfs2: fsid=loop0.0: journal 0 mapped with 1 extents [ 28.453488] gfs2: fsid=loop0.0: jid=0, already locked for use [ 28.459424] gfs2: fsid=loop0.0: jid=0: Looking at journal... [ 28.586667] gfs2: fsid=loop0.0: jid=0: Done [ 28.591134] gfs2: fsid=loop0.0: first mount done, others may mount [ 28.755281] gfs2: fsid=loop0.0: found 1 quota changes [ 28.777114] WARNING: CPU: 0 PID: 4469 at ./include/linux/backing-dev.h:341 account_page_dirtied+0x8f9/0xcb0 [ 28.787097] Kernel panic - not syncing: panic_on_warn set ... [ 28.787097] [ 28.794429] CPU: 0 PID: 4469 Comm: syzkaller368843 Not tainted 4.16.0-rc7+ #9 [ 28.801673] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.810998] Call Trace: [ 28.813562] dump_stack+0x194/0x24d [ 28.817161] ? arch_local_irq_restore+0x53/0x53 [ 28.821818] ? vsnprintf+0x1ed/0x1900 [ 28.825590] panic+0x1e4/0x41c [ 28.828780] ? refcount_error_report+0x214/0x214 [ 28.833504] ? show_regs_print_info+0x18/0x18 [ 28.837973] ? __warn+0x1c1/0x200 [ 28.841397] ? account_page_dirtied+0x8f9/0xcb0 [ 28.846035] __warn+0x1dc/0x200 [ 28.849287] ? account_page_dirtied+0x8f9/0xcb0 [ 28.853925] report_bug+0x1f4/0x2b0 [ 28.857526] fixup_bug.part.10+0x37/0x80 [ 28.861559] do_error_trap+0x2d7/0x3e0 [ 28.865417] ? math_error+0x400/0x400 [ 28.869190] ? trace_hardirqs_off+0x10/0x10 [ 28.873480] ? trace_hardirqs_off+0x10/0x10 [ 28.877771] ? trace_hardirqs_off+0x10/0x10 [ 28.882065] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.886882] do_invalid_op+0x1b/0x20 [ 28.890567] invalid_op+0x1b/0x40 [ 28.894002] RIP: 0010:account_page_dirtied+0x8f9/0xcb0 [ 28.899245] RSP: 0018:ffff8801d966e5c0 EFLAGS: 00010093 [ 28.904578] RAX: ffff8801acb7e600 RBX: 1ffff1003b2cdcba RCX: ffffffff818f47a9 [ 28.911819] RDX: 0000000000000000 RSI: ffff8801d3338148 RDI: 0000000000000082 [ 28.919059] RBP: ffff8801d966e698 R08: 1ffff1003b2cdc13 R09: 000000000000000c [ 28.926302] R10: ffff8801d966e558 R11: 0000000000000002 R12: ffff8801c96f0368 [ 28.933551] R13: ffffea0006b12780 R14: ffff8801c96f01d8 R15: ffff8801c96f01d8 [ 28.940799] ? account_page_dirtied+0x8f9/0xcb0 [ 28.945443] ? wb_writeout_inc+0x360/0x360 [ 28.949653] ? lock_acquire+0x1d5/0x580 [ 28.953598] ? __mem_cgroup_largest_soft_limit_node+0x780/0x780 [ 28.959645] __set_page_dirty+0x100/0x4b0 [ 28.963773] ? do_thaw_one+0xd0/0xd0 [ 28.967457] ? lock_page_memcg+0x2af/0x380 [ 28.971669] ? __lock_is_held+0xb6/0x140 [ 28.975702] ? __mem_cgroup_largest_soft_limit_node+0x780/0x780 [ 28.981733] mark_buffer_dirty+0x454/0x5d0 [ 28.985940] ? __set_page_dirty_buffers+0x390/0x390 [ 28.990932] ? check_same_owner+0x320/0x320 [ 28.995230] ? rcu_note_context_switch+0x710/0x710 [ 29.000140] ? __might_sleep+0x95/0x190 [ 29.004088] gfs2_unpin+0x143/0x12c0 [ 29.007775] ? revoke_lo_after_commit+0x470/0x470 [ 29.012587] ? __schedule+0x1ec0/0x1ec0 [ 29.016530] ? finish_wait+0x490/0x490 [ 29.020386] ? remove_wait_queue+0x350/0x350 [ 29.024762] ? find_held_lock+0x35/0x1d0 [ 29.028799] ? log_flush_wait+0x341/0x440 [ 29.032917] buf_lo_after_commit+0x273/0x430 [ 29.037292] ? ip_cmp+0xa0/0xa0 [ 29.040547] ? gfs2_unpin+0x12c0/0x12c0 [ 29.044492] ? _raw_spin_unlock+0x22/0x30 [ 29.048609] ? gfs2_before_commit+0x6fb/0xa00 [ 29.053077] ? prepare_to_wait+0x4d0/0x4d0 [ 29.057280] ? gfs2_log_flush_bio.part.15+0x84/0xd0 [ 29.062265] ? gfs2_unpin+0x12c0/0x12c0 [ 29.066211] gfs2_log_flush+0xe2a/0x2750 [ 29.070244] ? do_raw_spin_trylock+0x190/0x190 [ 29.074798] ? gfs2_log_shutdown+0x560/0x560 [ 29.079180] ? trace_hardirqs_off+0x10/0x10 [ 29.083476] ? __queue_work+0x5b9/0x1230 [ 29.087510] ? trace_hardirqs_off+0x10/0x10 [ 29.091803] ? find_held_lock+0x35/0x1d0 [ 29.095839] ? is_bpf_text_address+0x7b/0x120 [ 29.100308] ? find_held_lock+0x35/0x1d0 [ 29.104341] ? depot_save_stack+0x2ca/0x460 [ 29.108633] ? lock_downgrade+0x980/0x980 [ 29.112756] ? lock_release+0xa40/0xa40 [ 29.116699] ? is_bpf_text_address+0xa4/0x120 [ 29.121164] ? do_raw_spin_trylock+0x190/0x190 [ 29.125730] ? unwind_get_return_address+0x61/0xa0 [ 29.130632] ? trace_hardirqs_off+0xd/0x10 [ 29.134840] ? _raw_spin_unlock_irqrestore+0xa6/0xc0 [ 29.139911] ? depot_save_stack+0x2ca/0x460 [ 29.144203] ? save_stack+0xa3/0xd0 [ 29.147800] ? save_stack+0x43/0xd0 [ 29.151394] ? __kasan_slab_free+0x11a/0x170 [ 29.155774] ? kasan_slab_free+0xe/0x10 [ 29.159717] ? kfree+0xd9/0x260 [ 29.162977] ? do_sync+0x610/0xe40 [ 29.166486] ? gfs2_quota_sync+0x2cc/0x570 [ 29.170693] ? gfs2_sync_fs+0x46/0xb0 [ 29.174463] ? sync_filesystem+0x188/0x2e0 [ 29.178665] ? generic_shutdown_super+0xd5/0x540 [ 29.183391] ? kill_block_super+0x9b/0xf0 [ 29.187507] ? gfs2_kill_sb+0x133/0x1b0 [ 29.191452] ? deactivate_locked_super+0x88/0xd0 [ 29.196176] ? deactivate_super+0x141/0x1b0 [ 29.200469] ? cleanup_mnt+0xb2/0x150 [ 29.204237] ? __cleanup_mnt+0x16/0x20 [ 29.208091] ? task_work_run+0x199/0x270 [ 29.212120] ? do_exit+0x9bb/0x1ad0 [ 29.215717] ? do_group_exit+0x149/0x400 [ 29.219748] ? SyS_exit_group+0x1d/0x20 [ 29.223692] ? do_syscall_64+0x281/0x940 [ 29.227722] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 29.233056] ? print_irqtrace_events+0x270/0x270 [ 29.237782] ? free_obj_work+0x690/0x690 [ 29.241815] ? lock_release+0xa40/0xa40 [ 29.245765] ? mark_held_locks+0xaf/0x100 [ 29.249881] ? kfree+0xf3/0x260 [ 29.253130] ? do_sync+0x610/0xe40 [ 29.256642] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.261642] ? trace_hardirqs_on+0xd/0x10 [ 29.265759] do_sync+0x666/0xe40 [ 29.269098] ? gfs2_qd_shrink_scan+0xb50/0xb50 [ 29.273649] ? gfs2_quota_sync+0x3bc/0x570 [ 29.277851] ? lock_downgrade+0x980/0x980 [ 29.281970] ? qd_check_sync+0x3fb/0x5d0 [ 29.286002] ? slot_hold.isra.13+0x90/0x90 [ 29.290209] gfs2_quota_sync+0x2cc/0x570 [ 29.294238] ? gfs2_quota_sync+0x2cc/0x570 [ 29.298457] gfs2_sync_fs+0x46/0xb0 [ 29.302058] ? gfs2_rlist_free+0x1d0/0x1d0 [ 29.306274] sync_filesystem+0x188/0x2e0 [ 29.310313] ? sync_fs_one_sb+0xf0/0xf0 [ 29.314255] ? mark_held_locks+0xaf/0x100 [ 29.318373] ? _raw_spin_unlock_irqrestore+0x31/0xc0 [ 29.323445] generic_shutdown_super+0xd5/0x540 [ 29.328000] ? destroy_super_rcu+0x200/0x200 [ 29.332383] ? __alloc_percpu+0x30/0x30 [ 29.336328] ? d_path+0x930/0x930 [ 29.339754] ? unregister_shrinker+0x22c/0x3a0 [ 29.344306] ? __might_sleep+0x95/0x190 [ 29.348253] kill_block_super+0x9b/0xf0 [ 29.352199] gfs2_kill_sb+0x133/0x1b0 [ 29.355969] deactivate_locked_super+0x88/0xd0 [ 29.360522] deactivate_super+0x141/0x1b0 [ 29.364641] ? __sb_start_write+0x2a0/0x2a0 [ 29.368944] cleanup_mnt+0xb2/0x150 [ 29.372539] __cleanup_mnt+0x16/0x20 [ 29.376220] task_work_run+0x199/0x270 [ 29.380076] ? task_work_cancel+0x210/0x210 [ 29.384368] ? free_nsproxy+0x18b/0x1f0 [ 29.388311] ? switch_task_namespaces+0xa2/0xc0 [ 29.392958] do_exit+0x9bb/0x1ad0 [ 29.396382] ? mm_update_next_owner+0x930/0x930 [ 29.401021] ? lock_downgrade+0x980/0x980 [ 29.405139] ? locks_remove_posix+0x518/0x820 [ 29.409603] ? do_lock_file_wait+0x280/0x280 [ 29.413989] ? trace_hardirqs_off+0x10/0x10 [ 29.418284] ? blkdev_put+0x4f0/0x4f0 [ 29.422063] ? trace_hardirqs_off+0x10/0x10 [ 29.426366] ? _raw_spin_unlock+0x22/0x30 [ 29.430486] ? mnt_get_count+0x150/0x150 [ 29.434536] ? find_held_lock+0x35/0x1d0 [ 29.438582] ? __close_fd+0x20b/0x360 [ 29.442352] ? lock_downgrade+0x980/0x980 [ 29.446473] ? dnotify_flush+0x74/0x2d0 [ 29.450417] ? fput+0xd2/0x140 [ 29.453580] ? file_path+0x30/0x30 [ 29.457100] ? trace_hardirqs_on+0xd/0x10 [ 29.461223] ? __close_fd+0x222/0x360 [ 29.465004] do_group_exit+0x149/0x400 [ 29.468864] ? trace_hardirqs_off+0xd/0x10 [ 29.473068] ? exit_to_usermode_loop+0x198/0x2f0 [ 29.477795] ? SyS_exit+0x30/0x30 [ 29.481221] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 29.486731] ? do_syscall_64+0xb7/0x940 [ 29.490690] ? do_group_exit+0x400/0x400 [ 29.494722] SyS_exit_group+0x1d/0x20 [ 29.498497] do_syscall_64+0x281/0x940 [ 29.502366] ? vmalloc_sync_all+0x30/0x30 [ 29.506485] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 29.511209] ? syscall_return_slowpath+0x550/0x550 [ 29.516108] ? syscall_return_slowpath+0x2ac/0x550 [ 29.521006] ? prepare_exit_to_usermode+0x350/0x350 [ 29.525990] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 29.531323] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.536137] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 29.541293] RIP: 0033:0x456c29 [ 29.544452] RSP: 002b:00007fff74938dc8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 29.552131] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000456c29 [ 29.559371] RDX: 00000000004170e0 RSI: 0000000000000000 RDI: 0000000000000001 [ 29.566613] RBP: 0000000000000003 R08: 000000000000000a R09: 0000000000418100 [ 29.573852] R10: 00000000200a9300 R11: 0000000000000202 R12: 0000000000000004 [ 29.581089] R13: 0000000000418100 R14: 0000000000000000 R15: 0000000000000000 [ 29.588823] Dumping ftrace buffer: [ 29.592437] (ftrace buffer empty) [ 29.596116] Kernel Offset: disabled [ 29.599717] Rebooting in 86400 seconds..