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 '10.128.10.1' (ECDSA) to the list of known hosts. 2018/04/21 08:39:41 parsed 1 programs 2018/04/21 08:39:41 executed programs: 0 syzkaller login: [ 25.956781] IPVS: ftp: loaded support on port[0] = 21 [ 26.007337] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 26.014561] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 26.024247] F2FS-fs (loop0): invalid crc value [ 26.061191] F2FS-fs (loop0): Try to recover 1th superblock, ret: 0 [ 26.067744] F2FS-fs (loop0): Mounted with checkpoint version = d [ 26.091738] F2FS-fs (loop0): Bitmap was wrongly cleared, blk:9740 [ 26.098239] ------------[ cut here ]------------ [ 26.102996] kernel BUG at fs/f2fs/segment.c:1884! [ 26.107884] invalid opcode: 0000 [#1] SMP KASAN [ 26.112540] Dumping ftrace buffer: [ 26.116053] (ftrace buffer empty) [ 26.119738] Modules linked in: [ 26.122916] CPU: 1 PID: 4508 Comm: syz-executor0 Not tainted 4.17.0-rc1+ #10 [ 26.130074] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.139414] RIP: 0010:update_sit_entry+0x1215/0x1590 [ 26.144493] RSP: 0018:ffff8801af526708 EFLAGS: 00010282 [ 26.149834] RAX: ffffed0035ea4cc0 RBX: ffff8801ad454f90 RCX: 0000000000000000 [ 26.157082] RDX: 0000000000000000 RSI: ffffffff82eeb87e RDI: ffffed0035ea4cb6 [ 26.164339] RBP: ffff8801af526760 R08: ffff8801ad4a2480 R09: ffffed003b5e4f90 [ 26.171595] R10: ffffed003b5e4f90 R11: ffff8801daf27c87 R12: ffff8801adb8d380 [ 26.178842] R13: 0000000000000001 R14: 0000000000000008 R15: 00000000ffffffff [ 26.186093] FS: 00000000014af940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 26.194305] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.200165] CR2: 00007f06bc223000 CR3: 00000001adb02000 CR4: 00000000001406e0 [ 26.207426] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.214683] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.221936] Call Trace: [ 26.224512] allocate_data_block+0x66f/0x2050 [ 26.228994] ? write_one_page+0xac0/0xac0 [ 26.233138] ? __down_interruptible+0x6e0/0x6e0 [ 26.237788] ? io_type_to_rw_hint+0x1a0/0x1a0 [ 26.242262] ? up_read+0x1a/0x110 [ 26.245693] ? get_node_info+0x305/0x12e0 [ 26.249822] ? check_same_owner+0x320/0x320 [ 26.254125] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 26.259293] do_write_page+0x105/0x1b0 [ 26.263158] write_node_page+0x129/0x350 [ 26.267197] ? write_meta_page+0x5e0/0x5e0 [ 26.271414] __write_node_page+0x7da/0x1370 [ 26.275715] ? read_node_page+0x640/0x640 [ 26.279846] ? clear_page_dirty_for_io+0x36f/0x1000 [ 26.284841] ? balance_dirty_pages_ratelimited+0x1f50/0x1f50 [ 26.290621] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 26.296135] ? f2fs_wait_on_page_writeback+0x148/0x460 [ 26.301391] ? drop_inmem_pages_all+0x1b0/0x1b0 [ 26.306051] ? pagevec_lookup_range_tag+0x40/0x80 [ 26.310881] sync_node_pages+0x18cf/0x1eb0 [ 26.315098] ? __bfs+0xa8/0x790 [ 26.318367] ? fsync_node_pages+0x1c00/0x1c00 [ 26.322846] ? graph_lock+0xd0/0x170 [ 26.326547] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.332072] ? __bpf_trace_bpf_map_next_key+0x40/0x40 [ 26.337241] ? print_usage_bug+0xc0/0xc0 [ 26.341282] ? is_bpf_text_address+0xae/0x170 [ 26.345757] ? graph_lock+0x170/0x170 [ 26.349540] ? write_checkpoint+0x1b7/0x5380 [ 26.353939] ? graph_lock+0x170/0x170 [ 26.357718] ? find_held_lock+0x36/0x1c0 [ 26.361760] ? lock_downgrade+0x8e0/0x8e0 [ 26.365892] ? lock_release+0xa10/0xa10 [ 26.369848] ? check_same_owner+0x320/0x320 [ 26.374149] ? mutex_trylock+0x2a0/0x2a0 [ 26.378189] ? rcu_note_context_switch+0x710/0x710 [ 26.383098] ? blk_lld_busy+0x70/0x70 [ 26.386885] ? trace_event_raw_event_sched_kthread_stop_ret+0x141/0x170 [ 26.393631] ? up_write+0x72/0x210 [ 26.397166] ? up_read+0x110/0x110 [ 26.400686] ? down_read+0x1b0/0x1b0 [ 26.404391] block_operations+0x429/0xa60 [ 26.408520] ? f2fs_sync_inode_meta+0x3c0/0x3c0 [ 26.413170] ? __lock_acquire+0x28fb/0x5140 [ 26.417477] ? __lock_acquire+0x7f5/0x5140 [ 26.421697] ? debug_check_no_locks_freed+0x310/0x310 [ 26.426872] write_checkpoint+0x3ba/0x5380 [ 26.431089] ? lock_acquire+0x1dc/0x520 [ 26.435052] ? block_operations+0xa60/0xa60 [ 26.439358] ? rcu_note_context_switch+0x710/0x710 [ 26.444275] ? __might_sleep+0x95/0x190 [ 26.448233] ? kasan_check_write+0x14/0x20 [ 26.452449] ? __mutex_lock+0x7d9/0x17f0 [ 26.456492] ? wait_for_completion+0x870/0x870 [ 26.461055] ? f2fs_sync_fs+0x2f0/0x6a0 [ 26.465013] ? mutex_trylock+0x2a0/0x2a0 [ 26.469068] ? kasan_check_read+0x11/0x20 [ 26.473199] ? rcu_is_watching+0x85/0x140 [ 26.477346] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 26.481909] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.486907] ? wait_sb_inodes+0x8f0/0xc20 [ 26.491040] ? wakeup_dirtytime_writeback+0x5c0/0x5c0 [ 26.496210] ? replenish_dl_entity.cold.52+0x37/0x37 [ 26.501296] ? __might_sleep+0x95/0x190 [ 26.505250] ? wb_wait_for_completion+0x13c/0x2d0 [ 26.510078] ? graph_lock+0x170/0x170 [ 26.513857] ? block_dump___mark_inode_dirty+0x120/0x120 [ 26.519290] ? generic_writepages+0xdc/0x120 [ 26.523696] ? write_cache_pages+0x1690/0x1690 [ 26.528257] ? __lock_is_held+0xb5/0x140 [ 26.532308] f2fs_sync_fs+0x2fb/0x6a0 [ 26.536089] ? try_to_writeback_inodes_sb+0x70/0x70 [ 26.541522] ? __bpf_trace_f2fs_direct_IO_exit+0x50/0x50 [ 26.546954] ? delete_from_page_cache_batch+0xf70/0xf70 [ 26.552303] ? filemap_flush+0x23/0x30 [ 26.556171] ? __bpf_trace_f2fs_direct_IO_exit+0x50/0x50 [ 26.561601] sync_filesystem+0x265/0x310 [ 26.565653] ? sync_fs_one_sb+0x100/0x100 [ 26.569793] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 26.575317] ? kthread_stop+0x218/0x8e0 [ 26.579290] ? kthread_unpark+0x180/0x180 [ 26.583417] ? mark_held_locks+0xc9/0x160 [ 26.587552] generic_shutdown_super+0xd7/0x520 [ 26.592115] ? destroy_super_rcu+0x200/0x200 [ 26.596500] ? mark_held_locks+0xc9/0x160 [ 26.600624] ? quarantine_put+0xeb/0x190 [ 26.604666] ? kfree+0x111/0x260 [ 26.608019] ? stop_gc_thread+0x69/0xc0 [ 26.611975] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.616990] ? trace_hardirqs_on+0xd/0x10 [ 26.621122] kill_block_super+0xa4/0x100 [ 26.625163] kill_f2fs_super+0x9f/0xd0 [ 26.629032] deactivate_locked_super+0x97/0x100 [ 26.633681] deactivate_super+0x188/0x1b0 [ 26.637810] ? super_setup_bdi+0xb0/0xb0 [ 26.641856] cleanup_mnt+0xbf/0x160 [ 26.645460] __cleanup_mnt+0x16/0x20 [ 26.649155] task_work_run+0x1e4/0x290 [ 26.653029] ? task_work_cancel+0x240/0x240 [ 26.657334] ? exit_to_usermode_loop+0x87/0x310 [ 26.661985] exit_to_usermode_loop+0x2bd/0x310 [ 26.666548] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 26.671391] ? do_syscall_64+0x92/0x800 [ 26.675349] do_syscall_64+0x6ac/0x800 [ 26.679216] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 26.684074] ? syscall_return_slowpath+0x5c0/0x5c0 [ 26.689011] ? syscall_return_slowpath+0x30f/0x5c0 [ 26.693954] ? retint_user+0x18/0x18 [ 26.697671] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.702587] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 26.707767] RIP: 0033:0x457d97 [ 26.710954] RSP: 002b:00007ffd46f9c8e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 [ 26.718641] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000457d97 [ 26.725890] RDX: 00000000014b09a3 RSI: 0000000000000002 RDI: 00007ffd46f9da50 [ 26.733143] RBP: 00007ffd46f9da50 R08: 0000000000000000 R09: 0000000000000009 [ 26.740392] R10: 0000000000000005 R11: 0000000000000246 R12: 00000000014b0940 [ 26.747640] R13: 0000000000000000 R14: 0000000000000002 R15: 000000000000658e [ 26.754889] Code: c6 40 d6 f2 87 e8 5c 1d f6 ff 0f 0b e8 15 96 80 fe 8b 4d d0 48 8b 7d b8 48 c7 c2 20 d7 f2 87 48 c7 c6 40 d6 f2 87 e8 3b 1d f6 ff <0f> 0b e8 e4 f0 bc fe e9 73 ef ff ff 4c 89 ef e8 d7 f0 bc fe e9 [ 26.774052] RIP: update_sit_entry+0x1215/0x1590 RSP: ffff8801af526708 [ 26.780718] ---[ end trace f498328bb02610a2 ]--- [ 26.785511] Kernel panic - not syncing: Fatal exception [ 26.791370] Dumping ftrace buffer: [ 26.794917] (ftrace buffer empty) [ 26.798602] Kernel Offset: disabled [ 26.802210] Rebooting in 86400 seconds..