Warning: Permanently added '10.128.0.103' (ECDSA) to the list of known hosts. 2018/12/24 06:09:01 fuzzer started 2018/12/24 06:09:04 connecting to host at 10.128.0.26:39047 2018/12/24 06:09:04 checking revisions... 2018/12/24 06:09:04 testing simple program... syzkaller login: [ 40.502921] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program [ 59.330108] WARNING: CPU: 0 PID: 310 at include/linux/blk-cgroup.h:518 __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.340494] Kernel panic - not syncing: panic_on_warn set ... [ 59.346382] CPU: 0 PID: 310 Comm: kworker/u4:4 Not tainted 4.20.0-rc7-next-20181221 #186 [ 59.354610] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.363968] Workqueue: writeback wb_workfn (flush-8:0) [ 59.369277] Call Trace: [ 59.371869] dump_stack+0x1d3/0x2c6 [ 59.375504] ? dump_stack_print_info.cold.1+0x20/0x20 [ 59.380714] panic+0x2ad/0x632 [ 59.383912] ? add_taint.cold.5+0x16/0x16 [ 59.388082] ? __warn.cold.8+0x5/0x4f [ 59.391884] ? __warn+0xe8/0x1d0 [ 59.395260] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.400632] __warn.cold.8+0x20/0x4f [ 59.404349] ? rcu_softirq_qs+0x20/0x20 [ 59.408327] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.413699] report_bug+0x254/0x2d0 [ 59.417337] do_error_trap+0x11b/0x200 [ 59.421236] do_invalid_op+0x36/0x40 [ 59.424953] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.430323] invalid_op+0x14/0x20 [ 59.433784] RIP: 0010:__bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.439757] 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 [ 59.458658] RSP: 0018:ffff8881d8f5d738 EFLAGS: 00010293 [ 59.464050] RAX: ffff8881d8f505c0 RBX: 0000000000000000 RCX: ffffffff83779576 [ 59.471319] RDX: 0000000000000000 RSI: ffffffff83779b1b RDI: 0000000000000005 [ 59.478586] RBP: ffff8881d8f5d8b8 R08: ffff8881d8f505c0 R09: ffffed103b5c5b77 [ 59.485855] R10: ffffed103b5c5b77 R11: ffff8881dae2dbbb R12: ffff8881ceed0200 [ 59.493127] R13: ffff8881d18bca00 R14: ffff8881c0541b18 R15: ffff8881ceed0200 [ 59.500409] ? __bio_associate_blkg.isra.36+0x266/0x8f0 [ 59.505777] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.511157] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 59.516523] ? kasan_check_write+0x14/0x20 [ 59.520781] ? bio_init+0x139/0x260 [ 59.524457] ? bio_reset+0x510/0x510 [ 59.528174] ? mark_held_locks+0x130/0x130 [ 59.532424] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.537962] ? bio_alloc_bioset+0x2cc/0x6f0 [ 59.542285] ? mark_held_locks+0x130/0x130 [ 59.546527] ? bvec_alloc+0x2d0/0x2d0 [ 59.550349] __bio_clone_fast+0x412/0x5e0 [ 59.554502] bio_clone_fast+0x42/0x110 [ 59.558400] bio_split+0x86/0x260 [ 59.561863] blk_queue_split+0xa1e/0x2080 [ 59.566017] ? blk_queue_bounce+0x126/0x29b6 [ 59.570477] ? __blk_recalc_rq_segments+0xe20/0xe20 [ 59.575518] ? find_held_lock+0x36/0x1c0 [ 59.579597] ? graph_lock+0x270/0x270 [ 59.583411] ? ktime_get+0x332/0x400 [ 59.587137] ? find_held_lock+0x36/0x1c0 [ 59.591207] blk_mq_make_request+0x2e7/0x1e30 [ 59.595712] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.601255] ? check_preemption_disabled+0x48/0x280 [ 59.606280] ? blk_mq_try_issue_directly+0xaf0/0xaf0 [ 59.611389] ? __lock_is_held+0xb5/0x140 [ 59.615469] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 59.621031] ? trace_event_raw_event_block_rq_requeue+0x6f0/0x6f0 [ 59.627293] ? __set_page_dirty_buffers+0x810/0x810 [ 59.632334] ? ___might_sleep+0x1ed/0x300 [ 59.636487] ? ext4_mark_iloc_dirty+0x17a9/0x2f30 [ 59.641337] ? arch_local_save_flags+0x40/0x40 [ 59.645920] ? lock_downgrade+0x900/0x900 [ 59.650087] ? kasan_check_write+0x14/0x20 [ 59.654329] ? __brelse+0x104/0x180 [ 59.657983] ? block_commit_write+0x30/0x30 [ 59.662314] ? __ext4_handle_dirty_metadata+0x1e0/0x5a0 [ 59.667689] ? kasan_check_write+0x14/0x20 [ 59.671928] ? ext4_mark_iloc_dirty+0x199a/0x2f30 [ 59.676798] generic_make_request+0x9a5/0x1890 [ 59.681389] ? ___might_sleep+0x1ed/0x300 [ 59.685561] ? blk_queue_enter+0x11f0/0x11f0 [ 59.689976] ? other_inode_match+0xbb0/0xbb0 [ 59.694405] ? __might_sleep+0x95/0x190 [ 59.698405] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 59.703944] ? __ext4_journal_get_write_access+0x6d/0xa0 [ 59.709403] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.714948] ? ext4_reserve_inode_write+0x148/0x260 [ 59.719972] ? ext4_mark_inode_dirty+0x266/0xb20 [ 59.724738] ? ext4_expand_extra_isize+0x5b0/0x5b0 [ 59.729669] ? lock_release+0xa00/0xa00 [ 59.733649] submit_bio+0xba/0x460 [ 59.737191] ? submit_bio+0xba/0x460 [ 59.740925] ? generic_make_request+0x1890/0x1890 [ 59.745780] ? up_write+0x7b/0x220 [ 59.749330] ? down_write_nested+0x130/0x130 [ 59.753743] ? down_read+0x120/0x120 [ 59.757469] ext4_io_submit+0x197/0x230 [ 59.761453] ext4_writepages+0x1c4b/0x4190 [ 59.765719] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 59.770477] ? graph_lock+0x240/0x270 [ 59.774307] ? print_usage_bug+0xc0/0xc0 [ 59.778394] ? __lock_acquire+0x62f/0x4c20 [ 59.782629] ? hctx_unlock+0xde/0x150 [ 59.786431] ? print_usage_bug+0xc0/0xc0 [ 59.790496] ? __lock_acquire+0x62f/0x4c20 [ 59.794768] ? mark_held_locks+0x130/0x130 [ 59.799020] ? __ext4_get_inode_loc+0x470/0x1330 [ 59.803797] ? mark_held_locks+0x130/0x130 [ 59.808042] ? graph_lock+0x270/0x270 [ 59.811854] ? kasan_check_write+0x14/0x20 [ 59.816094] ? __brelse+0x104/0x180 [ 59.819760] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.825320] ? check_preemption_disabled+0x48/0x280 [ 59.830345] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 59.835110] do_writepages+0x9a/0x1a0 [ 59.838910] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 59.843664] ? do_writepages+0x9a/0x1a0 [ 59.847653] __writeback_single_inode+0x20a/0x1660 [ 59.852594] ? __mark_inode_dirty+0x1510/0x1510 [ 59.857263] ? find_held_lock+0x36/0x1c0 [ 59.861342] ? find_held_lock+0x36/0x1c0 [ 59.865421] ? wbc_attach_and_unlock_inode+0x5c0/0xa30 [ 59.870698] ? lock_downgrade+0x900/0x900 [ 59.874849] ? find_held_lock+0x13f/0x1c0 [ 59.879002] ? kasan_check_read+0x11/0x20 [ 59.883158] ? do_raw_spin_unlock+0xa7/0x330 [ 59.887569] ? do_raw_spin_trylock+0x270/0x270 [ 59.892153] ? __lock_is_held+0xb5/0x140 [ 59.896228] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 59.901767] ? wbc_attach_and_unlock_inode+0x675/0xa30 [ 59.907084] ? __writeback_single_inode+0x1660/0x1660 [ 59.912289] writeback_sb_inodes+0x71f/0x1210 [ 59.916816] ? wbc_detach_inode+0x960/0x960 [ 59.921164] ? lock_release+0xa00/0xa00 [ 59.925176] ? down_read_trylock+0xda/0x140 [ 59.929501] ? trylock_super+0x22/0x110 [ 59.933480] ? downgrade_write+0x270/0x270 [ 59.937722] ? queue_io+0x3dd/0x800 [ 59.941363] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 59.946909] __writeback_inodes_wb+0x1b9/0x340 [ 59.951500] ? writeback_sb_inodes+0x1210/0x1210 [ 59.956254] ? __lock_is_held+0xb5/0x140 [ 59.960346] wb_writeback+0xa73/0xfc0 [ 59.964174] ? writeback_inodes_wb.constprop.50+0x330/0x330 [ 59.969889] ? widen_string+0xe0/0x2e0 [ 59.973790] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 59.979019] ? print_usage_bug+0xc0/0xc0 [ 59.983110] ? string+0x225/0x2d0 [ 59.986594] ? widen_string+0x2e0/0x2e0 [ 59.990582] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 59.995615] ? find_next_bit+0x104/0x130 [ 59.999686] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 60.004704] ? find_next_bit+0x104/0x130 [ 60.008775] ? cpumask_next+0x41/0x50 [ 60.012596] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 60.017622] ? get_nr_dirty_inodes+0xd6/0x130 [ 60.022118] ? __local_bh_enable_ip+0x160/0x260 [ 60.026812] ? get_nr_dirty_pages+0x17c/0x1f0 [ 60.031309] ? _raw_spin_unlock_bh+0x30/0x40 [ 60.035721] ? inode_sleep_on_writeback+0x240/0x240 [ 60.040741] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.046285] ? check_preemption_disabled+0x48/0x280 [ 60.051321] ? wb_workfn+0x521/0x1790 [ 60.055130] ? wb_workfn+0x521/0x1790 [ 60.058935] ? __local_bh_enable_ip+0x160/0x260 [ 60.063611] wb_workfn+0x1008/0x1790 [ 60.067331] ? __lock_acquire+0x62f/0x4c20 [ 60.071577] ? inode_wait_for_writeback+0x40/0x40 [ 60.076430] ? mark_held_locks+0x130/0x130 [ 60.080680] ? graph_lock+0x270/0x270 [ 60.084518] ? graph_lock+0x270/0x270 [ 60.088325] ? lock_is_held_type+0x210/0x210 [ 60.092750] ? graph_lock+0x270/0x270 [ 60.096564] ? debug_object_deactivate+0x37d/0x480 [ 60.101494] ? lock_downgrade+0x900/0x900 [ 60.105648] ? find_held_lock+0x36/0x1c0 [ 60.109719] ? graph_lock+0x270/0x270 [ 60.113545] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.119100] ? check_preemption_disabled+0x48/0x280 [ 60.124127] ? __lock_is_held+0xb5/0x140 [ 60.128211] process_one_work+0xc90/0x1c40 [ 60.132445] ? mark_held_locks+0x130/0x130 [ 60.136693] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 60.141373] ? __bpf_trace_sched_wake_idle_without_ipi+0x10/0x10 [ 60.147538] ? __switch_to_asm+0x34/0x70 [ 60.151604] ? __switch_to_asm+0x34/0x70 [ 60.155659] ? __switch_to_asm+0x40/0x70 [ 60.159699] ? __switch_to_asm+0x34/0x70 [ 60.163757] ? __switch_to_asm+0x40/0x70 [ 60.167800] ? __switch_to_asm+0x34/0x70 [ 60.171887] ? __switch_to_asm+0x34/0x70 [ 60.175952] ? __switch_to_asm+0x34/0x70 [ 60.180010] ? __switch_to_asm+0x40/0x70 [ 60.184320] ? __switch_to_asm+0x34/0x70 [ 60.184338] ? __switch_to_asm+0x40/0x70 [ 60.184353] ? __switch_to_asm+0x34/0x70 [ 60.196508] ? set_pf_worker+0x74/0xd0 [ 60.200381] ? __sched_text_start+0x8/0x8 [ 60.204513] ? graph_lock+0x270/0x270 [ 60.208295] ? find_held_lock+0x36/0x1c0 [ 60.212342] ? find_held_lock+0x36/0x1c0 [ 60.216404] ? lock_acquire+0x1ed/0x520 [ 60.220376] ? worker_thread+0x3e0/0x1390 [ 60.224541] ? kasan_check_write+0x14/0x20 [ 60.228770] ? do_raw_spin_lock+0x14f/0x350 [ 60.233070] ? __schedule+0x1ed0/0x1ed0 [ 60.237030] ? rwlock_bug.part.2+0x90/0x90 [ 60.241248] ? trace_hardirqs_on+0x310/0x310 [ 60.245645] worker_thread+0x17f/0x1390 [ 60.249617] ? __bpf_trace_sched_wake_idle_without_ipi+0x10/0x10 [ 60.255740] ? __switch_to_asm+0x34/0x70 [ 60.259796] ? __switch_to_asm+0x40/0x70 [ 60.263842] ? process_one_work+0x1c40/0x1c40 [ 60.268327] ? __schedule+0x9e6/0x1ed0 [ 60.272198] ? __sched_text_start+0x8/0x8 [ 60.276324] ? __sched_text_start+0x8/0x8 [ 60.280459] ? __kthread_parkme+0xce/0x1a0 [ 60.284674] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 60.289755] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 60.294837] ? lockdep_hardirqs_on+0x421/0x5c0 [ 60.299398] ? trace_hardirqs_on+0xbd/0x310 [ 60.303699] ? kasan_check_read+0x11/0x20 [ 60.307830] ? __kthread_parkme+0xce/0x1a0 [ 60.312057] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 60.317492] ? __schedule+0x1ed0/0x1ed0 [ 60.321451] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 60.326537] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 60.332069] ? __kthread_parkme+0xfb/0x1a0 [ 60.336285] ? process_one_work+0x1c40/0x1c40 [ 60.340759] kthread+0x35a/0x440 [ 60.344113] ? kthread_bind+0x40/0x40 [ 60.347904] ret_from_fork+0x3a/0x50 [ 60.352513] Kernel Offset: disabled [ 60.356179] Rebooting in 86400 seconds..