Warning: Permanently added '10.128.0.126' (ECDSA) to the list of known hosts. 2018/12/21 12:33:29 fuzzer started 2018/12/21 12:33:30 connecting to host at 10.128.0.26:46777 2018/12/21 12:33:30 checking revisions... 2018/12/21 12:33:30 testing simple program... syzkaller login: [ 41.624767] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program [ 60.128708] WARNING: CPU: 1 PID: 91 at include/linux/blk-cgroup.h:518 __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.139041] Kernel panic - not syncing: panic_on_warn set ... [ 60.144940] CPU: 1 PID: 91 Comm: kworker/u4:3 Not tainted 4.20.0-rc7-next-20181221 #183 [ 60.153080] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.162454] Workqueue: writeback wb_workfn (flush-8:0) [ 60.167734] Call Trace: [ 60.170330] dump_stack+0x1d3/0x2c6 [ 60.173967] ? dump_stack_print_info.cold.1+0x20/0x20 [ 60.179175] panic+0x2ad/0x632 [ 60.182382] ? add_taint.cold.5+0x16/0x16 [ 60.186549] ? __warn.cold.8+0x5/0x4f [ 60.190353] ? __warn+0xe8/0x1d0 [ 60.193732] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.199559] __warn.cold.8+0x20/0x4f [ 60.203279] ? rcu_softirq_qs+0x20/0x20 [ 60.207261] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.212633] report_bug+0x254/0x2d0 [ 60.216290] do_error_trap+0x11b/0x200 [ 60.220190] do_invalid_op+0x36/0x40 [ 60.223931] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.229300] invalid_op+0x14/0x20 [ 60.232758] RIP: 0010:__bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.238737] 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 [ 60.257650] RSP: 0018:ffff8881d9015738 EFLAGS: 00010293 [ 60.263023] RAX: ffff8881d9006180 RBX: 0000000000000000 RCX: ffffffff83779576 [ 60.270303] RDX: 0000000000000000 RSI: ffffffff83779b1b RDI: 0000000000000005 [ 60.277582] RBP: ffff8881d90158b8 R08: ffff8881d9006180 R09: ffffed103b5e5b77 [ 60.284864] R10: ffffed103b5e5b77 R11: ffff8881daf2dbbb R12: ffff8881cee89340 [ 60.292160] R13: ffff8881b34b8a40 R14: ffff8881bf5aebd8 R15: ffff8881cee89340 [ 60.299466] ? __bio_associate_blkg.isra.36+0x266/0x8f0 [ 60.304843] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.310231] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.315612] ? kasan_check_write+0x14/0x20 [ 60.319873] ? bio_init+0x139/0x260 [ 60.323532] ? bio_reset+0x510/0x510 [ 60.327261] ? mark_held_locks+0x130/0x130 [ 60.331515] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.337060] ? bio_alloc_bioset+0x2cc/0x6f0 [ 60.341383] ? mark_held_locks+0x130/0x130 [ 60.345638] ? bvec_alloc+0x2d0/0x2d0 [ 60.349451] __bio_clone_fast+0x412/0x5e0 [ 60.353609] bio_clone_fast+0x42/0x110 [ 60.357501] bio_split+0x86/0x260 [ 60.360965] blk_queue_split+0xa1e/0x2080 [ 60.365156] ? blk_queue_bounce+0x126/0x29b6 [ 60.369607] ? __blk_recalc_rq_segments+0xe20/0xe20 [ 60.374652] ? find_held_lock+0x36/0x1c0 [ 60.378728] ? graph_lock+0x270/0x270 [ 60.382540] ? ktime_get+0x332/0x400 [ 60.386269] ? find_held_lock+0x36/0x1c0 [ 60.390341] blk_mq_make_request+0x2e7/0x1e30 [ 60.394850] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.400407] ? check_preemption_disabled+0x48/0x280 [ 60.405440] ? blk_mq_try_issue_directly+0xaf0/0xaf0 [ 60.410551] ? __lock_is_held+0xb5/0x140 [ 60.414644] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 60.420200] ? trace_event_raw_event_block_rq_requeue+0x6f0/0x6f0 [ 60.426443] ? __set_page_dirty_buffers+0x810/0x810 [ 60.431473] ? ___might_sleep+0x1ed/0x300 [ 60.435627] ? ext4_mark_iloc_dirty+0x17a9/0x2f30 [ 60.440487] ? arch_local_save_flags+0x40/0x40 [ 60.445076] ? lock_downgrade+0x900/0x900 [ 60.449243] ? kasan_check_write+0x14/0x20 [ 60.453492] ? __brelse+0x104/0x180 [ 60.457137] ? block_commit_write+0x30/0x30 [ 60.461489] ? __ext4_handle_dirty_metadata+0x1e0/0x5a0 [ 60.466887] ? kasan_check_write+0x14/0x20 [ 60.471137] ? ext4_mark_iloc_dirty+0x199a/0x2f30 [ 60.476006] generic_make_request+0x9a5/0x1890 [ 60.480595] ? ___might_sleep+0x1ed/0x300 [ 60.484755] ? blk_queue_enter+0x11f0/0x11f0 [ 60.489167] ? other_inode_match+0xbb0/0xbb0 [ 60.493583] ? __might_sleep+0x95/0x190 [ 60.497566] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 60.503114] ? __ext4_journal_get_write_access+0x6d/0xa0 [ 60.508575] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.514119] ? ext4_reserve_inode_write+0x148/0x260 [ 60.519147] ? ext4_mark_inode_dirty+0x266/0xb20 [ 60.523921] ? ext4_expand_extra_isize+0x5b0/0x5b0 [ 60.528859] ? lock_release+0xa00/0xa00 [ 60.532858] submit_bio+0xba/0x460 [ 60.536425] ? submit_bio+0xba/0x460 [ 60.540151] ? generic_make_request+0x1890/0x1890 [ 60.545016] ? up_write+0x7b/0x220 [ 60.548587] ? down_write_nested+0x130/0x130 [ 60.552999] ? down_read+0x120/0x120 [ 60.556724] ext4_io_submit+0x197/0x230 [ 60.560706] ext4_writepages+0x1c4b/0x4190 [ 60.564975] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 60.569741] ? graph_lock+0x240/0x270 [ 60.573555] ? print_usage_bug+0xc0/0xc0 [ 60.577643] ? __lock_acquire+0x62f/0x4c20 [ 60.581890] ? hctx_unlock+0xde/0x150 [ 60.585705] ? print_usage_bug+0xc0/0xc0 [ 60.589773] ? __lock_acquire+0x62f/0x4c20 [ 60.594023] ? mark_held_locks+0x130/0x130 [ 60.598263] ? __ext4_get_inode_loc+0x470/0x1330 [ 60.603039] ? mark_held_locks+0x130/0x130 [ 60.607274] ? graph_lock+0x270/0x270 [ 60.611082] ? kasan_check_write+0x14/0x20 [ 60.615328] ? __brelse+0x104/0x180 [ 60.618964] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.624522] ? check_preemption_disabled+0x48/0x280 [ 60.629557] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 60.634323] do_writepages+0x9a/0x1a0 [ 60.638129] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 60.642893] ? do_writepages+0x9a/0x1a0 [ 60.646900] __writeback_single_inode+0x20a/0x1660 [ 60.651841] ? __mark_inode_dirty+0x1510/0x1510 [ 60.656521] ? find_held_lock+0x36/0x1c0 [ 60.660596] ? find_held_lock+0x36/0x1c0 [ 60.664685] ? wbc_attach_and_unlock_inode+0x5c0/0xa30 [ 60.669967] ? lock_downgrade+0x900/0x900 [ 60.674124] ? find_held_lock+0x13f/0x1c0 [ 60.678280] ? kasan_check_read+0x11/0x20 [ 60.682441] ? do_raw_spin_unlock+0xa7/0x330 [ 60.686857] ? do_raw_spin_trylock+0x270/0x270 [ 60.691452] ? __lock_is_held+0xb5/0x140 [ 60.695541] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 60.701108] ? wbc_attach_and_unlock_inode+0x675/0xa30 [ 60.706406] ? __writeback_single_inode+0x1660/0x1660 [ 60.711617] writeback_sb_inodes+0x71f/0x1210 [ 60.716138] ? wbc_detach_inode+0x960/0x960 [ 60.720471] ? lock_release+0xa00/0xa00 [ 60.724471] ? down_read_trylock+0xda/0x140 [ 60.728797] ? trylock_super+0x22/0x110 [ 60.732779] ? downgrade_write+0x270/0x270 [ 60.737016] ? queue_io+0x3dd/0x800 [ 60.740660] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 60.746209] __writeback_inodes_wb+0x1b9/0x340 [ 60.750811] ? writeback_sb_inodes+0x1210/0x1210 [ 60.755572] ? __lock_is_held+0xb5/0x140 [ 60.759656] wb_writeback+0xa73/0xfc0 [ 60.763498] ? writeback_inodes_wb.constprop.50+0x330/0x330 [ 60.769224] ? widen_string+0xe0/0x2e0 [ 60.773128] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 60.778326] ? print_usage_bug+0xc0/0xc0 [ 60.782391] ? string+0x225/0x2d0 [ 60.785861] ? widen_string+0x2e0/0x2e0 [ 60.789864] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 60.794921] ? find_next_bit+0x104/0x130 [ 60.798999] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 60.804023] ? find_next_bit+0x104/0x130 [ 60.808095] ? cpumask_next+0x41/0x50 [ 60.811914] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 60.816946] ? get_nr_dirty_inodes+0xd6/0x130 [ 60.821456] ? __local_bh_enable_ip+0x160/0x260 [ 60.826148] ? get_nr_dirty_pages+0x17c/0x1f0 [ 60.830650] ? _raw_spin_unlock_bh+0x30/0x40 [ 60.835067] ? inode_sleep_on_writeback+0x240/0x240 [ 60.840095] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.845642] ? check_preemption_disabled+0x48/0x280 [ 60.850678] ? wb_workfn+0x521/0x1790 [ 60.854500] ? wb_workfn+0x521/0x1790 [ 60.858314] ? __local_bh_enable_ip+0x160/0x260 [ 60.862994] wb_workfn+0x1008/0x1790 [ 60.866718] ? __lock_acquire+0x62f/0x4c20 [ 60.870978] ? inode_wait_for_writeback+0x40/0x40 [ 60.875836] ? mark_held_locks+0x130/0x130 [ 60.880073] ? graph_lock+0x270/0x270 [ 60.883902] ? graph_lock+0x270/0x270 [ 60.887709] ? lock_is_held_type+0x210/0x210 [ 60.892138] ? graph_lock+0x270/0x270 [ 60.895958] ? debug_object_deactivate+0x37d/0x480 [ 60.900900] ? lock_downgrade+0x900/0x900 [ 60.905062] ? find_held_lock+0x36/0x1c0 [ 60.909130] ? graph_lock+0x270/0x270 [ 60.912943] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.918493] ? check_preemption_disabled+0x48/0x280 [ 60.923531] ? __lock_is_held+0xb5/0x140 [ 60.927610] process_one_work+0xc90/0x1c40 [ 60.931850] ? mark_held_locks+0x130/0x130 [ 60.936111] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 60.940791] ? __bpf_trace_sched_wake_idle_without_ipi+0x10/0x10 [ 60.946941] ? __switch_to_asm+0x34/0x70 [ 60.951007] ? __switch_to_asm+0x34/0x70 [ 60.955077] ? __switch_to_asm+0x40/0x70 [ 60.959140] ? __switch_to_asm+0x34/0x70 [ 60.963202] ? __switch_to_asm+0x40/0x70 [ 60.967268] ? __switch_to_asm+0x34/0x70 [ 60.971330] ? __switch_to_asm+0x34/0x70 [ 60.975392] ? __switch_to_asm+0x34/0x70 [ 60.979464] ? __switch_to_asm+0x40/0x70 [ 60.983532] ? __switch_to_asm+0x34/0x70 [ 60.987591] ? __switch_to_asm+0x40/0x70 [ 60.991652] ? __switch_to_asm+0x34/0x70 [ 60.995725] ? set_pf_worker+0x74/0xd0 [ 60.999628] ? __sched_text_start+0x8/0x8 [ 61.003779] ? graph_lock+0x270/0x270 [ 61.007581] ? graph_lock+0x270/0x270 [ 61.011406] ? find_held_lock+0x36/0x1c0 [ 61.015488] ? lock_acquire+0x1ed/0x520 [ 61.019478] ? worker_thread+0x3e0/0x1390 [ 61.023645] ? kasan_check_write+0x14/0x20 [ 61.027900] ? do_raw_spin_lock+0x14f/0x350 [ 61.032236] ? __schedule+0x1ed0/0x1ed0 [ 61.036220] ? rwlock_bug.part.2+0x90/0x90 [ 61.040458] ? trace_hardirqs_on+0x310/0x310 [ 61.044900] worker_thread+0x17f/0x1390 [ 61.048888] ? __bpf_trace_sched_wake_idle_without_ipi+0x10/0x10 [ 61.055059] ? process_one_work+0x1c40/0x1c40 [ 61.059568] ? __schedule+0x9e6/0x1ed0 [ 61.063472] ? __sched_text_start+0x8/0x8 [ 61.067621] ? __sched_text_start+0x8/0x8 [ 61.071792] ? __kthread_parkme+0xce/0x1a0 [ 61.076036] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 61.081142] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 61.086257] ? lockdep_hardirqs_on+0x421/0x5c0 [ 61.090842] ? trace_hardirqs_on+0xbd/0x310 [ 61.095173] ? kasan_check_read+0x11/0x20 [ 61.099327] ? __kthread_parkme+0xce/0x1a0 [ 61.103572] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 61.109032] ? __schedule+0x1ed0/0x1ed0 [ 61.113018] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 61.118131] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 61.123671] ? __kthread_parkme+0xfb/0x1a0 [ 61.127931] ? process_one_work+0x1c40/0x1c40 [ 61.132432] kthread+0x35a/0x440 [ 61.135809] ? kthread_bind+0x40/0x40 [ 61.139629] ret_from_fork+0x3a/0x50 [ 61.144462] Kernel Offset: disabled [ 61.148136] Rebooting in 86400 seconds..