[info] Using makefile-style concurrent boot in runlevel 2. [ 26.340354] audit: type=1800 audit(1545381843.388:21): pid=5853 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [....] 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 '10.128.0.23' (ECDSA) to the list of known hosts. 2018/12/21 08:44:21 fuzzer started 2018/12/21 08:44:23 connecting to host at 10.128.0.26:38777 2018/12/21 08:44:23 checking revisions... 2018/12/21 08:44:23 testing simple program... syzkaller login: [ 46.618987] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program [ 59.127135] WARNING: CPU: 0 PID: 21 at include/linux/blk-cgroup.h:518 __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.137522] Kernel panic - not syncing: panic_on_warn set ... [ 59.143439] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 4.20.0-rc7-next-20181221 #182 [ 59.151588] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.160981] Workqueue: writeback wb_workfn (flush-8:0) [ 59.166277] Call Trace: [ 59.168887] dump_stack+0x1d3/0x2c6 [ 59.172542] ? dump_stack_print_info.cold.1+0x20/0x20 [ 59.177760] panic+0x2ad/0x632 [ 59.180970] ? add_taint.cold.5+0x16/0x16 [ 59.185136] ? __warn.cold.8+0x5/0x4f [ 59.188949] ? __warn+0xe8/0x1d0 [ 59.192325] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.197701] __warn.cold.8+0x20/0x4f [ 59.201427] ? rcu_softirq_qs+0x20/0x20 [ 59.205416] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.210792] report_bug+0x254/0x2d0 [ 59.214443] do_error_trap+0x11b/0x200 [ 59.218345] do_invalid_op+0x36/0x40 [ 59.222273] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.227651] invalid_op+0x14/0x20 [ 59.231124] RIP: 0010:__bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.237111] Code: 7b 50 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 f1 00 00 00 48 8b 43 50 4c 89 ef e8 bf c6 88 04 e9 a4 f9 ff ff e8 c5 ad 07 fe <0f> 0b e9 5c fa ff ff e8 b9 ad 07 fe e8 ab e2 88 fd e9 fe f9 ff ff [ 59.256036] RSP: 0000:ffff8881d942d738 EFLAGS: 00010293 [ 59.261419] RAX: ffff8881d941e580 RBX: 0000000000000000 RCX: ffffffff83779576 [ 59.268800] RDX: 0000000000000000 RSI: ffffffff83779b1b RDI: 0000000000000005 [ 59.276083] RBP: ffff8881d942d8b8 R08: ffff8881d941e580 R09: ffffed103b5c5b77 [ 59.283371] R10: ffffed103b5c5b77 R11: ffff8881dae2dbbb R12: ffff8881ceea4ac0 [ 59.290661] R13: ffff8881c195ca40 R14: ffff8881c2954a58 R15: ffff8881ceea4ac0 [ 59.297969] ? __bio_associate_blkg.isra.36+0x266/0x8f0 [ 59.303360] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.308752] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.314153] ? kasan_check_write+0x14/0x20 [ 59.318435] ? bio_init+0x139/0x260 [ 59.322082] ? bio_reset+0x510/0x510 [ 59.325817] ? mark_held_locks+0x130/0x130 [ 59.330085] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.335641] ? bio_alloc_bioset+0x2cc/0x6f0 [ 59.339985] ? mark_held_locks+0x130/0x130 [ 59.344244] ? bvec_alloc+0x2d0/0x2d0 [ 59.348069] __bio_clone_fast+0x412/0x5e0 [ 59.352239] bio_clone_fast+0x42/0x110 [ 59.356154] bio_split+0x86/0x260 [ 59.359622] blk_queue_split+0xa1e/0x2080 [ 59.363786] ? blk_queue_bounce+0x126/0x29b6 [ 59.368227] ? __blk_recalc_rq_segments+0xe20/0xe20 [ 59.373262] ? find_held_lock+0x36/0x1c0 [ 59.377343] ? graph_lock+0x270/0x270 [ 59.381176] ? ktime_get+0x332/0x400 [ 59.384909] ? find_held_lock+0x36/0x1c0 [ 59.388990] blk_mq_make_request+0x2e7/0x1e30 [ 59.393506] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.399057] ? check_preemption_disabled+0x48/0x280 [ 59.404092] ? blk_mq_try_issue_directly+0xaf0/0xaf0 [ 59.409215] ? __lock_is_held+0xb5/0x140 [ 59.413306] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 59.418873] ? trace_event_raw_event_block_rq_requeue+0x6f0/0x6f0 [ 59.425123] ? __set_page_dirty_buffers+0x810/0x810 [ 59.430172] ? ___might_sleep+0x1ed/0x300 [ 59.434326] ? ext4_mark_iloc_dirty+0x17a9/0x2f30 [ 59.439183] ? arch_local_save_flags+0x40/0x40 [ 59.443769] ? lock_downgrade+0x900/0x900 [ 59.447937] ? kasan_check_write+0x14/0x20 [ 59.452187] ? __brelse+0x104/0x180 [ 59.455830] ? block_commit_write+0x30/0x30 [ 59.460179] ? __ext4_handle_dirty_metadata+0x1e0/0x5a0 [ 59.465560] ? kasan_check_write+0x14/0x20 [ 59.469806] ? ext4_mark_iloc_dirty+0x199a/0x2f30 [ 59.474670] generic_make_request+0x9a5/0x1890 [ 59.479261] ? ___might_sleep+0x1ed/0x300 [ 59.483428] ? blk_queue_enter+0x11f0/0x11f0 [ 59.487848] ? other_inode_match+0xbb0/0xbb0 [ 59.492270] ? __might_sleep+0x95/0x190 [ 59.496260] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 59.501805] ? __ext4_journal_get_write_access+0x6d/0xa0 [ 59.507271] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.512820] ? ext4_reserve_inode_write+0x148/0x260 [ 59.517851] ? ext4_mark_inode_dirty+0x266/0xb20 [ 59.522646] ? ext4_expand_extra_isize+0x5b0/0x5b0 [ 59.527598] ? lock_release+0xa00/0xa00 [ 59.531594] submit_bio+0xba/0x460 [ 59.535152] ? submit_bio+0xba/0x460 [ 59.538876] ? generic_make_request+0x1890/0x1890 [ 59.543729] ? up_write+0x7b/0x220 [ 59.547284] ? down_write_nested+0x130/0x130 [ 59.551698] ? down_read+0x120/0x120 [ 59.555441] ext4_io_submit+0x197/0x230 [ 59.559437] ext4_writepages+0x1c4b/0x4190 [ 59.563719] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 59.568475] ? graph_lock+0x240/0x270 [ 59.572281] ? print_usage_bug+0xc0/0xc0 [ 59.576382] ? __lock_acquire+0x62f/0x4c20 [ 59.580639] ? hctx_unlock+0xde/0x150 [ 59.584456] ? print_usage_bug+0xc0/0xc0 [ 59.588528] ? __lock_acquire+0x62f/0x4c20 [ 59.592787] ? mark_held_locks+0x130/0x130 [ 59.597034] ? __ext4_get_inode_loc+0x470/0x1330 [ 59.601804] ? mark_held_locks+0x130/0x130 [ 59.606045] ? graph_lock+0x270/0x270 [ 59.609853] ? kasan_check_write+0x14/0x20 [ 59.614098] ? __brelse+0x104/0x180 [ 59.617734] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.623286] ? check_preemption_disabled+0x48/0x280 [ 59.628323] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 59.633097] do_writepages+0x9a/0x1a0 [ 59.636920] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 59.641681] ? do_writepages+0x9a/0x1a0 [ 59.645672] __writeback_single_inode+0x20a/0x1660 [ 59.650624] ? __mark_inode_dirty+0x1510/0x1510 [ 59.655303] ? find_held_lock+0x36/0x1c0 [ 59.659382] ? find_held_lock+0x36/0x1c0 [ 59.663469] ? wbc_attach_and_unlock_inode+0x5c0/0xa30 [ 59.668755] ? lock_downgrade+0x900/0x900 [ 59.672917] ? find_held_lock+0x13f/0x1c0 [ 59.677080] ? kasan_check_read+0x11/0x20 [ 59.681240] ? do_raw_spin_unlock+0xa7/0x330 [ 59.685665] ? do_raw_spin_trylock+0x270/0x270 [ 59.690255] ? __lock_is_held+0xb5/0x140 [ 59.694343] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 59.699904] ? wbc_attach_and_unlock_inode+0x675/0xa30 [ 59.705210] ? __writeback_single_inode+0x1660/0x1660 [ 59.710452] writeback_sb_inodes+0x71f/0x1210 [ 59.714983] ? wbc_detach_inode+0x960/0x960 [ 59.719320] ? lock_release+0xa00/0xa00 [ 59.723320] ? down_read_trylock+0xda/0x140 [ 59.727655] ? trylock_super+0x22/0x110 [ 59.731647] ? downgrade_write+0x270/0x270 [ 59.735894] ? queue_io+0x3dd/0x800 [ 59.739544] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 59.745187] __writeback_inodes_wb+0x1b9/0x340 [ 59.749787] ? writeback_sb_inodes+0x1210/0x1210 [ 59.754552] ? __lock_is_held+0xb5/0x140 [ 59.758657] wb_writeback+0xa73/0xfc0 [ 59.762483] ? writeback_inodes_wb.constprop.50+0x330/0x330 [ 59.768300] ? widen_string+0xe0/0x2e0 [ 59.772206] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 59.777415] ? print_usage_bug+0xc0/0xc0 [ 59.781486] ? string+0x225/0x2d0 [ 59.784957] ? widen_string+0x2e0/0x2e0 [ 59.788956] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 59.793993] ? find_next_bit+0x104/0x130 [ 59.798076] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 59.803105] ? find_next_bit+0x104/0x130 [ 59.807280] ? cpumask_next+0x41/0x50 [ 59.811090] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 59.816120] ? get_nr_dirty_inodes+0xd6/0x130 [ 59.820641] ? __local_bh_enable_ip+0x160/0x260 [ 59.825339] ? get_nr_dirty_pages+0x17c/0x1f0 [ 59.829851] ? _raw_spin_unlock_bh+0x30/0x40 [ 59.834280] ? inode_sleep_on_writeback+0x240/0x240 [ 59.839323] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.844884] ? check_preemption_disabled+0x48/0x280 [ 59.849923] ? wb_workfn+0x521/0x1790 [ 59.853753] ? wb_workfn+0x521/0x1790 [ 59.857581] ? __local_bh_enable_ip+0x160/0x260 [ 59.862264] wb_workfn+0x1008/0x1790 [ 59.865990] ? __lock_acquire+0x62f/0x4c20 [ 59.870245] ? inode_wait_for_writeback+0x40/0x40 [ 59.875104] ? mark_held_locks+0x130/0x130 [ 59.879350] ? graph_lock+0x270/0x270 [ 59.883191] ? graph_lock+0x270/0x270 [ 59.887003] ? lock_is_held_type+0x210/0x210 [ 59.891430] ? graph_lock+0x270/0x270 [ 59.895245] ? debug_object_deactivate+0x37d/0x480 [ 59.900185] ? lock_downgrade+0x900/0x900 [ 59.904343] ? find_held_lock+0x36/0x1c0 [ 59.908414] ? graph_lock+0x270/0x270 [ 59.912231] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.917865] ? check_preemption_disabled+0x48/0x280 [ 59.922891] ? __lock_is_held+0xb5/0x140 [ 59.926968] process_one_work+0xc90/0x1c40 [ 59.931215] ? mark_held_locks+0x130/0x130 [ 59.935478] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 59.940175] ? __bpf_trace_sched_wake_idle_without_ipi+0x10/0x10 [ 59.946337] ? __switch_to_asm+0x34/0x70 [ 59.950414] ? __switch_to_asm+0x34/0x70 [ 59.954483] ? __switch_to_asm+0x40/0x70 [ 59.958550] ? __switch_to_asm+0x34/0x70 [ 59.962614] ? __switch_to_asm+0x40/0x70 [ 59.966680] ? __switch_to_asm+0x34/0x70 [ 59.970753] ? __switch_to_asm+0x34/0x70 [ 59.974817] ? __switch_to_asm+0x40/0x70 [ 59.978885] ? __switch_to_asm+0x34/0x70 [ 59.982952] ? __switch_to_asm+0x40/0x70 [ 59.987022] ? __switch_to_asm+0x34/0x70 [ 59.991094] ? __switch_to_asm+0x40/0x70 [ 59.995174] ? __switch_to_asm+0x34/0x70 [ 59.999263] ? __sched_text_start+0x8/0x8 [ 60.003419] ? graph_lock+0x270/0x270 [ 60.007230] ? lock_downgrade+0x900/0x900 [ 60.011400] ? kasan_check_read+0x11/0x20 [ 60.015562] ? do_raw_spin_unlock+0xa7/0x330 [ 60.019987] ? find_held_lock+0x36/0x1c0 [ 60.024064] ? lock_acquire+0x1ed/0x520 [ 60.028044] ? worker_thread+0x3e0/0x1390 [ 60.032214] ? kasan_check_write+0x14/0x20 [ 60.036459] ? do_raw_spin_lock+0x14f/0x350 [ 60.040789] ? __schedule+0x1ed0/0x1ed0 [ 60.044781] ? rwlock_bug.part.2+0x90/0x90 [ 60.049029] ? trace_hardirqs_on+0x310/0x310 [ 60.053582] worker_thread+0x17f/0x1390 [ 60.057570] ? __bpf_trace_sched_wake_idle_without_ipi+0x10/0x10 [ 60.063746] ? process_one_work+0x1c40/0x1c40 [ 60.068258] ? __schedule+0x9e6/0x1ed0 [ 60.072168] ? __sched_text_start+0x8/0x8 [ 60.076324] ? __sched_text_start+0x8/0x8 [ 60.080503] ? __kthread_parkme+0xce/0x1a0 [ 60.084749] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 60.089859] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 60.094970] ? lockdep_hardirqs_on+0x421/0x5c0 [ 60.099563] ? trace_hardirqs_on+0xbd/0x310 [ 60.103887] ? kasan_check_read+0x11/0x20 [ 60.108039] ? __kthread_parkme+0xce/0x1a0 [ 60.112463] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 60.118026] ? __schedule+0x1ed0/0x1ed0 [ 60.122018] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 60.127145] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 60.132700] ? __kthread_parkme+0xfb/0x1a0 [ 60.136954] ? process_one_work+0x1c40/0x1c40 [ 60.141460] kthread+0x35a/0x440 [ 60.144980] ? kthread_bind+0x40/0x40 [ 60.148793] ret_from_fork+0x3a/0x50 [ 60.154143] Kernel Offset: disabled [ 60.157867] Rebooting in 86400 seconds..