[info] Using makefile-style concurrent boot in runlevel 2. [ 27.430123] audit: type=1800 audit(1545381844.685:21): pid=5940 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. [....] startpar: service(s) returned failure: ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.072494] sshd (6102) used greatest stack depth: 15720 bytes left Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts. 2018/12/21 08:44:20 fuzzer started 2018/12/21 08:44:23 connecting to host at 10.128.0.26:36469 2018/12/21 08:44:23 checking revisions... 2018/12/21 08:44:23 testing simple program... [ 46.376374] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program [ 60.277290] WARNING: CPU: 1 PID: 1520 at include/linux/blk-cgroup.h:518 __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.287756] Kernel panic - not syncing: panic_on_warn set ... [ 60.293645] CPU: 1 PID: 1520 Comm: kworker/u4:3 Not tainted 4.20.0-rc7-next-20181221 #182 [ 60.301959] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.311326] Workqueue: writeback wb_workfn (flush-8:0) [ 60.316609] Call Trace: [ 60.319204] dump_stack+0x1d3/0x2c6 [ 60.322842] ? dump_stack_print_info.cold.1+0x20/0x20 [ 60.328048] panic+0x2ad/0x632 [ 60.331244] ? add_taint.cold.5+0x16/0x16 [ 60.335400] ? __warn.cold.8+0x5/0x4f [ 60.339206] ? __warn+0xe8/0x1d0 [ 60.342590] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.347988] __warn.cold.8+0x20/0x4f [ 60.351704] ? rcu_softirq_qs+0x20/0x20 [ 60.355685] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.361055] report_bug+0x254/0x2d0 [ 60.364695] do_error_trap+0x11b/0x200 [ 60.368599] do_invalid_op+0x36/0x40 [ 60.372319] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.377688] invalid_op+0x14/0x20 [ 60.381151] RIP: 0010:__bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.387134] 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 [ 60.406035] RSP: 0018:ffff8881d462d738 EFLAGS: 00010293 [ 60.411398] RAX: ffff8881d461e380 RBX: 0000000000000000 RCX: ffffffff83779576 [ 60.418669] RDX: 0000000000000000 RSI: ffffffff83779b1b RDI: 0000000000000005 [ 60.425937] RBP: ffff8881d462d8b8 R08: ffff8881d461e380 R09: ffffed103b5e5b77 [ 60.433207] R10: ffffed103b5e5b77 R11: ffff8881daf2dbbb R12: ffff8881cee19340 [ 60.440474] R13: ffff8881b3354a40 R14: ffff8881bdf4a218 R15: ffff8881cee19340 [ 60.447768] ? __bio_associate_blkg.isra.36+0x266/0x8f0 [ 60.453142] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.458515] ? __bio_associate_blkg.isra.36+0x80b/0x8f0 [ 60.463879] ? kasan_check_write+0x14/0x20 [ 60.468113] ? bio_init+0x139/0x260 [ 60.471754] ? bio_reset+0x510/0x510 [ 60.475479] ? mark_held_locks+0x130/0x130 [ 60.479728] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.485271] ? bio_alloc_bioset+0x2cc/0x6f0 [ 60.489605] ? mark_held_locks+0x130/0x130 [ 60.493847] ? bvec_alloc+0x2d0/0x2d0 [ 60.497658] __bio_clone_fast+0x412/0x5e0 [ 60.501816] bio_clone_fast+0x42/0x110 [ 60.505712] bio_split+0x86/0x260 [ 60.509175] blk_queue_split+0xa1e/0x2080 [ 60.513338] ? blk_queue_bounce+0x126/0x29b6 [ 60.517769] ? __blk_recalc_rq_segments+0xe20/0xe20 [ 60.522792] ? find_held_lock+0x36/0x1c0 [ 60.526860] ? graph_lock+0x270/0x270 [ 60.530675] ? ktime_get+0x332/0x400 [ 60.534403] ? find_held_lock+0x36/0x1c0 [ 60.538473] blk_mq_make_request+0x2e7/0x1e30 [ 60.542981] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.548523] ? check_preemption_disabled+0x48/0x280 [ 60.553545] ? blk_mq_try_issue_directly+0xaf0/0xaf0 [ 60.558652] ? __lock_is_held+0xb5/0x140 [ 60.562736] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 60.568291] ? trace_event_raw_event_block_rq_requeue+0x6f0/0x6f0 [ 60.574529] ? __set_page_dirty_buffers+0x810/0x810 [ 60.579554] ? ___might_sleep+0x1ed/0x300 [ 60.583713] ? ext4_mark_iloc_dirty+0x17a9/0x2f30 [ 60.588558] ? arch_local_save_flags+0x40/0x40 [ 60.593158] ? lock_downgrade+0x900/0x900 [ 60.597335] ? kasan_check_write+0x14/0x20 [ 60.601575] ? __brelse+0x104/0x180 [ 60.605214] ? block_commit_write+0x30/0x30 [ 60.609539] ? __ext4_handle_dirty_metadata+0x1e0/0x5a0 [ 60.614911] ? kasan_check_write+0x14/0x20 [ 60.619157] ? ext4_mark_iloc_dirty+0x199a/0x2f30 [ 60.624039] generic_make_request+0x9a5/0x1890 [ 60.628630] ? ___might_sleep+0x1ed/0x300 [ 60.632790] ? blk_queue_enter+0x11f0/0x11f0 [ 60.637213] ? other_inode_match+0xbb0/0xbb0 [ 60.641628] ? __might_sleep+0x95/0x190 [ 60.645617] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 60.651163] ? __ext4_journal_get_write_access+0x6d/0xa0 [ 60.656632] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.662174] ? ext4_reserve_inode_write+0x148/0x260 [ 60.667197] ? ext4_mark_inode_dirty+0x266/0xb20 [ 60.671963] ? ext4_expand_extra_isize+0x5b0/0x5b0 [ 60.676899] ? lock_release+0xa00/0xa00 [ 60.680881] submit_bio+0xba/0x460 [ 60.684423] ? submit_bio+0xba/0x460 [ 60.688166] ? generic_make_request+0x1890/0x1890 [ 60.693046] ? up_write+0x7b/0x220 [ 60.696602] ? down_write_nested+0x130/0x130 [ 60.701012] ? down_read+0x120/0x120 [ 60.704735] ext4_io_submit+0x197/0x230 [ 60.708719] ext4_writepages+0x1c4b/0x4190 [ 60.712991] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 60.718100] ? graph_lock+0x240/0x270 [ 60.721910] ? print_usage_bug+0xc0/0xc0 [ 60.725999] ? __lock_acquire+0x62f/0x4c20 [ 60.730240] ? hctx_unlock+0xde/0x150 [ 60.734042] ? print_usage_bug+0xc0/0xc0 [ 60.738110] ? __lock_acquire+0x62f/0x4c20 [ 60.742352] ? mark_held_locks+0x130/0x130 [ 60.746604] ? __ext4_get_inode_loc+0x470/0x1330 [ 60.751375] ? mark_held_locks+0x130/0x130 [ 60.755632] ? graph_lock+0x270/0x270 [ 60.759438] ? kasan_check_write+0x14/0x20 [ 60.763676] ? __brelse+0x104/0x180 [ 60.767310] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.772852] ? check_preemption_disabled+0x48/0x280 [ 60.777884] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 60.782647] do_writepages+0x9a/0x1a0 [ 60.786454] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 60.791212] ? do_writepages+0x9a/0x1a0 [ 60.795201] __writeback_single_inode+0x20a/0x1660 [ 60.800151] ? __mark_inode_dirty+0x1510/0x1510 [ 60.804823] ? find_held_lock+0x36/0x1c0 [ 60.808897] ? find_held_lock+0x36/0x1c0 [ 60.812975] ? wbc_attach_and_unlock_inode+0x5c0/0xa30 [ 60.818252] ? lock_downgrade+0x900/0x900 [ 60.822403] ? find_held_lock+0x13f/0x1c0 [ 60.826562] ? kasan_check_read+0x11/0x20 [ 60.830725] ? do_raw_spin_unlock+0xa7/0x330 [ 60.835141] ? do_raw_spin_trylock+0x270/0x270 [ 60.839729] ? __lock_is_held+0xb5/0x140 [ 60.843810] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 60.849368] ? wbc_attach_and_unlock_inode+0x675/0xa30 [ 60.854650] ? __writeback_single_inode+0x1660/0x1660 [ 60.859856] writeback_sb_inodes+0x71f/0x1210 [ 60.864385] ? wbc_detach_inode+0x960/0x960 [ 60.868712] ? lock_release+0xa00/0xa00 [ 60.872710] ? down_read_trylock+0xda/0x140 [ 60.877034] ? trylock_super+0x22/0x110 [ 60.881013] ? downgrade_write+0x270/0x270 [ 60.885248] ? queue_io+0x3dd/0x800 [ 60.888892] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 60.894439] __writeback_inodes_wb+0x1b9/0x340 [ 60.899049] ? writeback_sb_inodes+0x1210/0x1210 [ 60.903813] ? __lock_is_held+0xb5/0x140 [ 60.907891] wb_writeback+0xa73/0xfc0 [ 60.911710] ? writeback_inodes_wb.constprop.50+0x330/0x330 [ 60.917439] ? widen_string+0xe0/0x2e0 [ 60.921340] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 60.926533] ? print_usage_bug+0xc0/0xc0 [ 60.930601] ? string+0x225/0x2d0 [ 60.934061] ? widen_string+0x2e0/0x2e0 [ 60.938061] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 60.943092] ? find_next_bit+0x104/0x130 [ 60.947171] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 60.952191] ? find_next_bit+0x104/0x130 [ 60.956258] ? cpumask_next+0x41/0x50 [ 60.960062] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 60.965083] ? get_nr_dirty_inodes+0xd6/0x130 [ 60.969594] ? __local_bh_enable_ip+0x160/0x260 [ 60.974271] ? get_nr_dirty_pages+0x17c/0x1f0 [ 60.978768] ? _raw_spin_unlock_bh+0x30/0x40 [ 60.983178] ? inode_sleep_on_writeback+0x240/0x240 [ 60.988199] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.993744] ? check_preemption_disabled+0x48/0x280 [ 60.998763] ? wb_workfn+0x521/0x1790 [ 61.002572] ? wb_workfn+0x521/0x1790 [ 61.006402] ? __local_bh_enable_ip+0x160/0x260 [ 61.011091] wb_workfn+0x1008/0x1790 [ 61.014808] ? __lock_acquire+0x62f/0x4c20 [ 61.019055] ? inode_wait_for_writeback+0x40/0x40 [ 61.023938] ? mark_held_locks+0x130/0x130 [ 61.028175] ? graph_lock+0x270/0x270 [ 61.031996] ? graph_lock+0x270/0x270 [ 61.035799] ? lock_is_held_type+0x210/0x210 [ 61.040222] ? graph_lock+0x270/0x270 [ 61.044041] ? debug_object_deactivate+0x37d/0x480 [ 61.048973] ? lock_downgrade+0x900/0x900 [ 61.053134] ? find_held_lock+0x36/0x1c0 [ 61.057203] ? graph_lock+0x270/0x270 [ 61.061012] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.066625] ? check_preemption_disabled+0x48/0x280 [ 61.071669] ? __lock_is_held+0xb5/0x140 [ 61.075791] process_one_work+0xc90/0x1c40 [ 61.080026] ? mark_held_locks+0x130/0x130 [ 61.084279] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 61.088957] ? __bpf_trace_sched_wake_idle_without_ipi+0x10/0x10 [ 61.095101] ? __switch_to_asm+0x34/0x70 [ 61.099169] ? __switch_to_asm+0x34/0x70 [ 61.103229] ? __switch_to_asm+0x40/0x70 [ 61.107288] ? __switch_to_asm+0x34/0x70 [ 61.111351] ? __switch_to_asm+0x40/0x70 [ 61.115414] ? __switch_to_asm+0x34/0x70 [ 61.119475] ? __switch_to_asm+0x34/0x70 [ 61.123539] ? __switch_to_asm+0x34/0x70 [ 61.127621] ? __switch_to_asm+0x40/0x70 [ 61.131683] ? __switch_to_asm+0x34/0x70 [ 61.135741] ? __switch_to_asm+0x40/0x70 [ 61.139800] ? __switch_to_asm+0x34/0x70 [ 61.143871] ? set_pf_worker+0x74/0xd0 [ 61.147769] ? __sched_text_start+0x8/0x8 [ 61.151914] ? graph_lock+0x270/0x270 [ 61.155719] ? graph_lock+0x270/0x270 [ 61.159531] ? lockdep_hardirqs_on+0x421/0x5c0 [ 61.164119] ? find_held_lock+0x36/0x1c0 [ 61.168200] ? lock_acquire+0x1ed/0x520 [ 61.172178] ? worker_thread+0x3e0/0x1390 [ 61.176339] ? kasan_check_write+0x14/0x20 [ 61.180574] ? do_raw_spin_lock+0x14f/0x350 [ 61.184907] ? __schedule+0x1ed0/0x1ed0 [ 61.188888] ? rwlock_bug.part.2+0x90/0x90 [ 61.193121] ? trace_hardirqs_on+0x310/0x310 [ 61.197601] worker_thread+0x17f/0x1390 [ 61.201608] ? __bpf_trace_sched_wake_idle_without_ipi+0x10/0x10 [ 61.207789] ? process_one_work+0x1c40/0x1c40 [ 61.212292] ? __schedule+0x9e6/0x1ed0 [ 61.216219] ? __sched_text_start+0x8/0x8 [ 61.220396] ? __sched_text_start+0x8/0x8 [ 61.224565] ? __kthread_parkme+0xce/0x1a0 [ 61.228813] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 61.233917] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 61.239021] ? lockdep_hardirqs_on+0x421/0x5c0 [ 61.243614] ? trace_hardirqs_on+0xbd/0x310 [ 61.247938] ? kasan_check_read+0x11/0x20 [ 61.252087] ? __kthread_parkme+0xce/0x1a0 [ 61.256320] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 61.261791] ? __schedule+0x1ed0/0x1ed0 [ 61.265777] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 61.270883] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 61.276420] ? __kthread_parkme+0xfb/0x1a0 [ 61.280674] ? process_one_work+0x1c40/0x1c40 [ 61.285173] kthread+0x35a/0x440 [ 61.288541] ? kthread_bind+0x40/0x40 [ 61.292348] ret_from_fork+0x3a/0x50 [ 61.297180] Kernel Offset: disabled [ 61.300852] Rebooting in 86400 seconds..