[info] Using makefile-style concurrent boot in runlevel 2. [ 28.642103] audit: type=1800 audit(1545631732.332:21): pid=6005 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 '10.128.0.16' (ECDSA) to the list of known hosts. 2018/12/24 06:09:04 fuzzer started 2018/12/24 06:09:06 connecting to host at 10.128.0.26:39323 2018/12/24 06:09:06 checking revisions... 2018/12/24 06:09:06 testing simple program... syzkaller login: [ 42.897171] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program [ 61.030265] WARNING: CPU: 0 PID: 2499 at include/linux/blk-cgroup.h:518 __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 61.040759] Kernel panic - not syncing: panic_on_warn set ... [ 61.046654] CPU: 0 PID: 2499 Comm: kworker/u4:4 Not tainted 4.20.0-rc7-next-20181221 #186 [ 61.054976] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.064349] Workqueue: writeback wb_workfn (flush-8:0) [ 61.069628] Call Trace: [ 61.072236] dump_stack+0x1d3/0x2c6 [ 61.075886] ? dump_stack_print_info.cold.1+0x20/0x20 [ 61.081095] panic+0x2ad/0x632 [ 61.084295] ? add_taint.cold.5+0x16/0x16 [ 61.088454] ? __warn.cold.8+0x5/0x4f [ 61.092261] ? __warn+0xe8/0x1d0 [ 61.095634] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 61.101004] __warn.cold.8+0x20/0x4f [ 61.104729] ? rcu_softirq_qs+0x20/0x20 [ 61.108710] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 61.114080] report_bug+0x254/0x2d0 [ 61.117716] do_error_trap+0x11b/0x200 [ 61.121619] do_invalid_op+0x36/0x40 [ 61.125334] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 61.130702] invalid_op+0x14/0x20 [ 61.134161] RIP: 0010:__bio_associate_blkg.isra.36+0x80b/0x8f0 [ 61.140142] 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 [ 61.159051] RSP: 0018:ffff8881cee3d738 EFLAGS: 00010293 [ 61.164417] RAX: ffff8881cee30180 RBX: 0000000000000000 RCX: ffffffff83779576 [ 61.171686] RDX: 0000000000000000 RSI: ffffffff83779b1b RDI: 0000000000000005 [ 61.178971] RBP: ffff8881cee3d8b8 R08: ffff8881cee30180 R09: ffffed103b5c5b77 [ 61.186248] R10: ffffed103b5c5b77 R11: ffff8881dae2dbbb R12: ffff8881ceeab340 [ 61.193568] R13: ffff8881b8164a00 R14: ffff8881b8b5c098 R15: ffff8881ceeab340 [ 61.200874] ? __bio_associate_blkg.isra.36+0x266/0x8f0 [ 61.206249] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 61.211623] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 61.217004] ? kasan_check_write+0x14/0x20 [ 61.221245] ? bio_init+0x139/0x260 [ 61.224894] ? bio_reset+0x510/0x510 [ 61.228614] ? mark_held_locks+0x130/0x130 [ 61.232879] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.238448] ? bio_alloc_bioset+0x2cc/0x6f0 [ 61.242772] ? mark_held_locks+0x130/0x130 [ 61.247026] ? bvec_alloc+0x2d0/0x2d0 [ 61.250838] __bio_clone_fast+0x412/0x5e0 [ 61.255007] bio_clone_fast+0x42/0x110 [ 61.258899] bio_split+0x86/0x260 [ 61.262362] blk_queue_split+0xa1e/0x2080 [ 61.266521] ? blk_queue_bounce+0x126/0x29b6 [ 61.270964] ? __blk_recalc_rq_segments+0xe20/0xe20 [ 61.275989] ? find_held_lock+0x36/0x1c0 [ 61.280055] ? graph_lock+0x270/0x270 [ 61.283877] ? ktime_get+0x332/0x400 [ 61.288645] ? find_held_lock+0x36/0x1c0 [ 61.292720] blk_mq_make_request+0x2e7/0x1e30 [ 61.297227] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.302773] ? check_preemption_disabled+0x48/0x280 [ 61.307798] ? blk_mq_try_issue_directly+0xaf0/0xaf0 [ 61.312910] ? __lock_is_held+0xb5/0x140 [ 61.316995] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 61.322551] ? trace_event_raw_event_block_rq_requeue+0x6f0/0x6f0 [ 61.328810] ? __set_page_dirty_buffers+0x810/0x810 [ 61.333839] ? ___might_sleep+0x1ed/0x300 [ 61.338005] ? ext4_mark_iloc_dirty+0x17a9/0x2f30 [ 61.342861] ? arch_local_save_flags+0x40/0x40 [ 61.347449] ? lock_downgrade+0x900/0x900 [ 61.351616] ? kasan_check_write+0x14/0x20 [ 61.355864] ? __brelse+0x104/0x180 [ 61.359501] ? block_commit_write+0x30/0x30 [ 61.363832] ? __ext4_handle_dirty_metadata+0x1e0/0x5a0 [ 61.369215] ? kasan_check_write+0x14/0x20 [ 61.373454] ? ext4_mark_iloc_dirty+0x199a/0x2f30 [ 61.378319] generic_make_request+0x9a5/0x1890 [ 61.382907] ? ___might_sleep+0x1ed/0x300 [ 61.387078] ? blk_queue_enter+0x11f0/0x11f0 [ 61.391495] ? other_inode_match+0xbb0/0xbb0 [ 61.395914] ? __might_sleep+0x95/0x190 [ 61.399908] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 61.405447] ? __ext4_journal_get_write_access+0x6d/0xa0 [ 61.410908] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.416449] ? ext4_reserve_inode_write+0x148/0x260 [ 61.421475] ? ext4_mark_inode_dirty+0x266/0xb20 [ 61.426243] ? ext4_expand_extra_isize+0x5b0/0x5b0 [ 61.431178] ? lock_release+0xa00/0xa00 [ 61.435162] submit_bio+0xba/0x460 [ 61.438708] ? submit_bio+0xba/0x460 [ 61.442427] ? generic_make_request+0x1890/0x1890 [ 61.447278] ? up_write+0x7b/0x220 [ 61.450823] ? down_write_nested+0x130/0x130 [ 61.455243] ? down_read+0x120/0x120 [ 61.458982] ext4_io_submit+0x197/0x230 [ 61.462968] ext4_writepages+0x1c4b/0x4190 [ 61.467239] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 61.472000] ? graph_lock+0x240/0x270 [ 61.475809] ? print_usage_bug+0xc0/0xc0 [ 61.479901] ? __lock_acquire+0x62f/0x4c20 [ 61.484146] ? hctx_unlock+0xde/0x150 [ 61.487972] ? print_usage_bug+0xc0/0xc0 [ 61.492045] ? __lock_acquire+0x62f/0x4c20 [ 61.496284] ? mark_held_locks+0x130/0x130 [ 61.500525] ? __ext4_get_inode_loc+0x470/0x1330 [ 61.505297] ? mark_held_locks+0x130/0x130 [ 61.509537] ? graph_lock+0x270/0x270 [ 61.513348] ? kasan_check_write+0x14/0x20 [ 61.517628] ? __brelse+0x104/0x180 [ 61.521267] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.526823] ? check_preemption_disabled+0x48/0x280 [ 61.531869] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 61.536637] do_writepages+0x9a/0x1a0 [ 61.540443] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 61.545207] ? do_writepages+0x9a/0x1a0 [ 61.549200] __writeback_single_inode+0x20a/0x1660 [ 61.554144] ? __mark_inode_dirty+0x1510/0x1510 [ 61.558826] ? find_held_lock+0x36/0x1c0 [ 61.562911] ? find_held_lock+0x36/0x1c0 [ 61.566993] ? wbc_attach_and_unlock_inode+0x5c0/0xa30 [ 61.572285] ? lock_downgrade+0x900/0x900 [ 61.576436] ? find_held_lock+0x13f/0x1c0 [ 61.580590] ? kasan_check_read+0x11/0x20 [ 61.584740] ? do_raw_spin_unlock+0xa7/0x330 [ 61.589154] ? do_raw_spin_trylock+0x270/0x270 [ 61.593747] ? __lock_is_held+0xb5/0x140 [ 61.597832] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 61.603385] ? wbc_attach_and_unlock_inode+0x675/0xa30 [ 61.608672] ? __writeback_single_inode+0x1660/0x1660 [ 61.613884] writeback_sb_inodes+0x71f/0x1210 [ 61.618405] ? wbc_detach_inode+0x960/0x960 [ 61.622732] ? lock_release+0xa00/0xa00 [ 61.626740] ? down_read_trylock+0xda/0x140 [ 61.631065] ? trylock_super+0x22/0x110 [ 61.635046] ? downgrade_write+0x270/0x270 [ 61.639286] ? queue_io+0x3dd/0x800 [ 61.642932] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 61.648491] __writeback_inodes_wb+0x1b9/0x340 [ 61.653096] ? writeback_sb_inodes+0x1210/0x1210 [ 61.657864] ? __lock_is_held+0xb5/0x140 [ 61.661946] wb_writeback+0xa73/0xfc0 [ 61.665768] ? writeback_inodes_wb.constprop.50+0x330/0x330 [ 61.671490] ? widen_string+0xe0/0x2e0 [ 61.675403] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 61.680602] ? print_usage_bug+0xc0/0xc0 [ 61.684671] ? string+0x225/0x2d0 [ 61.688131] ? widen_string+0x2e0/0x2e0 [ 61.692118] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 61.697141] ? find_next_bit+0x104/0x130 [ 61.701216] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 61.706236] ? find_next_bit+0x104/0x130 [ 61.710309] ? cpumask_next+0x41/0x50 [ 61.714119] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 61.719144] ? get_nr_dirty_inodes+0xd6/0x130 [ 61.723641] ? __local_bh_enable_ip+0x160/0x260 [ 61.728325] ? get_nr_dirty_pages+0x17c/0x1f0 [ 61.732824] ? _raw_spin_unlock_bh+0x30/0x40 [ 61.737244] ? inode_sleep_on_writeback+0x240/0x240 [ 61.742272] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.747813] ? check_preemption_disabled+0x48/0x280 [ 61.752840] ? wb_workfn+0x521/0x1790 [ 61.756652] ? wb_workfn+0x521/0x1790 [ 61.760458] ? __local_bh_enable_ip+0x160/0x260 [ 61.765139] wb_workfn+0x1008/0x1790 [ 61.768867] ? __lock_acquire+0x62f/0x4c20 [ 61.773117] ? inode_wait_for_writeback+0x40/0x40 [ 61.777979] ? mark_held_locks+0x130/0x130 [ 61.782212] ? graph_lock+0x270/0x270 [ 61.786034] ? graph_lock+0x270/0x270 [ 61.789838] ? lock_is_held_type+0x210/0x210 [ 61.794271] ? graph_lock+0x270/0x270 [ 61.798087] ? debug_object_deactivate+0x37d/0x480 [ 61.803018] ? lock_downgrade+0x900/0x900 [ 61.807171] ? find_held_lock+0x36/0x1c0 [ 61.811237] ? graph_lock+0x270/0x270 [ 61.815050] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.820596] ? check_preemption_disabled+0x48/0x280 [ 61.825626] ? __lock_is_held+0xb5/0x140 [ 61.829705] process_one_work+0xc90/0x1c40 [ 61.833952] ? mark_held_locks+0x130/0x130 [ 61.838224] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 61.842898] ? __bpf_trace_sched_wake_idle_without_ipi+0x10/0x10 [ 61.849043] ? __switch_to_asm+0x34/0x70 [ 61.853105] ? __switch_to_asm+0x34/0x70 [ 61.857172] ? __switch_to_asm+0x40/0x70 [ 61.861238] ? __switch_to_asm+0x34/0x70 [ 61.865300] ? __switch_to_asm+0x40/0x70 [ 61.869359] ? __switch_to_asm+0x34/0x70 [ 61.873419] ? __switch_to_asm+0x34/0x70 [ 61.877484] ? __switch_to_asm+0x34/0x70 [ 61.881548] ? __switch_to_asm+0x40/0x70 [ 61.885615] ? __switch_to_asm+0x34/0x70 [ 61.889674] ? __switch_to_asm+0x40/0x70 [ 61.893733] ? __switch_to_asm+0x34/0x70 [ 61.897813] ? set_pf_worker+0x74/0xd0 [ 61.901713] ? __sched_text_start+0x8/0x8 [ 61.905870] ? graph_lock+0x270/0x270 [ 61.909680] ? find_held_lock+0x36/0x1c0 [ 61.913754] ? find_held_lock+0x36/0x1c0 [ 61.917824] ? lock_acquire+0x1ed/0x520 [ 61.921812] ? worker_thread+0x3e0/0x1390 [ 61.925977] ? kasan_check_write+0x14/0x20 [ 61.930219] ? do_raw_spin_lock+0x14f/0x350 [ 61.934547] ? __schedule+0x1ed0/0x1ed0 [ 61.938529] ? rwlock_bug.part.2+0x90/0x90 [ 61.942765] ? trace_hardirqs_on+0x310/0x310 [ 61.947191] worker_thread+0x17f/0x1390 [ 61.951172] ? __bpf_trace_sched_wake_idle_without_ipi+0x10/0x10 [ 61.957336] ? process_one_work+0x1c40/0x1c40 [ 61.961840] ? __schedule+0x9e6/0x1ed0 [ 61.965743] ? kmem_cache_alloc_trace+0x154/0x750 [ 61.970600] ? __sched_text_start+0x8/0x8 [ 61.974775] ? __kthread_parkme+0xce/0x1a0 [ 61.979014] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 61.984118] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 61.989223] ? lockdep_hardirqs_on+0x421/0x5c0 [ 61.993810] ? trace_hardirqs_on+0xbd/0x310 [ 61.998136] ? kasan_check_read+0x11/0x20 [ 62.002290] ? __kthread_parkme+0xce/0x1a0 [ 62.006538] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 62.011998] ? __schedule+0x1ed0/0x1ed0 [ 62.015987] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 62.021099] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 62.026640] ? __kthread_parkme+0xfb/0x1a0 [ 62.030889] ? process_one_work+0x1c40/0x1c40 [ 62.035397] kthread+0x35a/0x440 [ 62.038766] ? kthread_bind+0x40/0x40 [ 62.042570] ret_from_fork+0x3a/0x50 [ 62.047429] Kernel Offset: disabled [ 62.051109] Rebooting in 86400 seconds..