[....] 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[ 19.149122] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.486920] random: sshd: uninitialized urandom read (32 bytes read) [ 22.716231] random: sshd: uninitialized urandom read (32 bytes read) [ 23.548074] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.41' (ECDSA) to the list of known hosts. [ 29.084364] random: sshd: uninitialized urandom read (32 bytes read) 2018/04/22 19:26:55 fuzzer started 2018/04/22 19:26:56 dialing manager at 10.128.0.26:38791 [ 53.387348] [ 53.389019] ============================= [ 53.393156] WARNING: suspicious RCU usage [ 53.397292] 4.17.0-rc1+ #12 Not tainted [ 53.401248] ----------------------------- [ 53.405386] include/linux/rcupdate.h:304 Illegal context switch in RCU read-side critical section! [ 53.414467] [ 53.414467] other info that might help us debug this: [ 53.414467] [ 53.422605] [ 53.422605] rcu_scheduler_active = 2, debug_locks = 1 [ 53.429266] 6 locks held by kworker/u4:1/22: [ 53.433658] #0: (ptrval) ((wq_completion)"writeback"){+.+.}, at: process_one_work+0xaef/0x1b50 [ 53.443212] #1: (ptrval) ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0xb46/0x1b50 [ 53.453809] #2: (ptrval) (&type->s_umount_key#29){++++}, at: trylock_super+0x22/0x110 [ 53.462581] #3: (ptrval) (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0x9a/0x1a0 [ 53.471699] #4: (ptrval) (jbd2_handle){.+.+}, at: start_this_handle+0x581/0x1250 [ 53.480032] #5: (ptrval) (rcu_read_lock){....}, at: find_get_pages_range_tag+0x139/0x1250 [ 53.489149] [ 53.489149] stack backtrace: [ 53.493647] CPU: 0 PID: 22 Comm: kworker/u4:1 Not tainted 4.17.0-rc1+ #12 [ 53.500561] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.509918] Workqueue: writeback wb_workfn (flush-8:0) [ 53.515192] Call Trace: [ 53.517769] [ 53.519919] dump_stack+0x1b9/0x294 [ 53.523548] ? dump_stack_print_info.cold.2+0x52/0x52 [ 53.528734] ? print_lock+0xd1/0xd6 [ 53.532356] ? vprintk_func+0x81/0xe7 [ 53.536156] lockdep_rcu_suspicious+0x14a/0x153 [ 53.540824] ___might_sleep+0x26d/0x320 [ 53.544796] ? check_same_owner+0x320/0x320 [ 53.549115] ? lock_release+0xa10/0xa10 [ 53.553086] ? lock_downgrade+0x8e0/0x8e0 [ 53.557240] __might_sleep+0x95/0x190 [ 53.561038] __kmalloc+0x2b9/0x760 [ 53.564573] ? trace_hardirqs_off+0xd/0x10 [ 53.568808] ? _raw_write_unlock_irqrestore+0x63/0xc0 [ 53.573994] ? crng_reseed+0x427/0x920 [ 53.577879] crng_reseed+0x427/0x920 [ 53.581593] ? _extract_entropy.constprop.32+0x150/0x150 [ 53.587045] ? __lock_is_held+0xb5/0x140 [ 53.591110] credit_entropy_bits+0x98d/0xa30 [ 53.595516] ? add_interrupt_randomness+0x494/0x860 [ 53.600528] ? crng_reseed+0x920/0x920 [ 53.604410] ? lock_downgrade+0x8e0/0x8e0 [ 53.608551] ? __mix_pool_bytes+0xde/0x400 [ 53.612783] ? kasan_check_read+0x11/0x20 [ 53.617249] ? do_raw_spin_unlock+0x9e/0x2e0 [ 53.621655] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 53.626235] ? __handle_irq_event_percpu+0x34d/0xad0 [ 53.631340] add_interrupt_randomness+0x494/0x860 [ 53.636182] ? extract_entropy.constprop.29+0x490/0x490 [ 53.641555] ? lock_downgrade+0x8e0/0x8e0 [ 53.645700] ? handle_edge_irq+0x30/0x870 [ 53.649848] handle_irq_event_percpu+0xf9/0x1c0 [ 53.654518] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 53.659094] ? __handle_irq_event_percpu+0xad0/0xad0 [ 53.664190] ? rcu_irq_exit+0xd8/0x110 [ 53.668078] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.673614] handle_irq_event+0xa7/0x135 [ 53.677674] handle_edge_irq+0x20f/0x870 [ 53.681737] handle_irq+0x18c/0x2e7 [ 53.685363] do_IRQ+0x78/0x190 [ 53.688554] common_interrupt+0xf/0xf [ 53.692339] [ 53.694574] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x1/0x20 [ 53.700620] RSP: 0018:ffff8801d941dbf0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffffda [ 53.708328] RAX: ffff8801d94125c0 RBX: 000000007fffffff RCX: ffffffff8194e3dc [ 53.715592] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 53.722859] RBP: ffff8801d941dfb8 R08: ffff8801d94125c0 R09: fffff94000de7f23 [ 53.730127] R10: fffff94000de7f23 R11: ffffea0006f3f91f R12: 0000000000000010 [ 53.737396] R13: 0000000000000001 R14: dffffc0000000000 R15: ffff8801d941df90 [ 53.744682] ? find_get_pages_range_tag+0x6ec/0x1250 [ 53.749797] ? find_get_pages_range_tag+0x70b/0x1250 [ 53.754914] ? unwind_dump+0xa1/0x180 [ 53.758720] ? wait_on_page_bit+0x650/0x650 [ 53.763043] ? find_held_lock+0x36/0x1c0 [ 53.767103] ? print_usage_bug+0xc0/0xc0 [ 53.771162] ? lock_acquire+0x1dc/0x520 [ 53.775132] ? mark_held_locks+0xc9/0x160 [ 53.779278] ? retint_kernel+0x10/0x10 [ 53.783171] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 53.787928] ? retint_kernel+0x10/0x10 [ 53.791815] ? __lock_is_held+0xb5/0x140 [ 53.795873] ? __lock_is_held+0xb5/0x140 [ 53.799940] ? rcu_note_context_switch+0x710/0x710 [ 53.804866] ? check_same_owner+0x320/0x320 [ 53.809190] pagevec_lookup_range_tag+0x40/0x80 [ 53.813863] mpage_prepare_extent_to_map+0x3ff/0x1100 [ 53.819058] ? ext4_block_write_begin+0x1560/0x1560 [ 53.824081] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.829613] ? jbd2__journal_start+0x15a/0xa70 [ 53.834195] ? jbd2_write_access_granted.part.8+0x420/0x420 [ 53.839909] ? rcu_note_context_switch+0x710/0x710 [ 53.844844] ? graph_lock+0x170/0x170 [ 53.848650] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.854193] ? __ext4_journal_start_sb+0x182/0x5e0 [ 53.859143] ext4_writepages+0x186f/0x4030 [ 53.863394] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 53.868145] ? print_usage_bug+0xc0/0xc0 [ 53.872237] ? print_usage_bug+0xc0/0xc0 [ 53.876303] ? __lock_acquire+0x7f5/0x5140 [ 53.880538] ? print_usage_bug+0xc0/0xc0 [ 53.884595] ? rcu_is_watching+0x85/0x140 [ 53.888740] ? __lock_acquire+0x7f5/0x5140 [ 53.892971] ? debug_check_no_locks_freed+0x310/0x310 [ 53.898165] ? debug_check_no_locks_freed+0x310/0x310 [ 53.903357] ? graph_lock+0x170/0x170 [ 53.907166] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 53.911925] do_writepages+0x9a/0x1a0 [ 53.915726] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 53.920476] ? do_writepages+0x9a/0x1a0 [ 53.924456] __writeback_single_inode+0x1e4/0x15c0 [ 53.929390] ? __mark_inode_dirty+0x1530/0x1530 [ 53.934057] ? find_held_lock+0x36/0x1c0 [ 53.938121] ? lock_acquire+0x1dc/0x520 [ 53.942091] ? find_held_lock+0x36/0x1c0 [ 53.946156] ? lock_downgrade+0x8e0/0x8e0 [ 53.950300] ? find_held_lock+0x13f/0x1c0 [ 53.954447] ? kasan_check_read+0x11/0x20 [ 53.958590] ? do_raw_spin_unlock+0x9e/0x2e0 [ 53.962995] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 53.967572] ? __lock_is_held+0xb5/0x140 [ 53.971640] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 53.977175] ? wbc_attach_and_unlock_inode+0x643/0x9e0 [ 53.982456] ? __writeback_single_inode+0x15c0/0x15c0 [ 53.987648] ? kasan_check_write+0x14/0x20 [ 53.991881] ? do_raw_spin_lock+0xc1/0x200 [ 53.996121] writeback_sb_inodes+0x6f0/0x11a0 [ 54.000624] ? wbc_detach_inode+0x8e0/0x8e0 [ 54.004941] ? find_held_lock+0x13f/0x1c0 [ 54.009092] ? down_read_trylock+0xf2/0x1d0 [ 54.013407] ? trylock_super+0x22/0x110 [ 54.017380] ? downgrade_write+0x290/0x290 [ 54.021617] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.027163] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.032705] __writeback_inodes_wb+0x1b0/0x320 [ 54.037289] ? writeback_sb_inodes+0x11a0/0x11a0 [ 54.042043] ? __lock_is_held+0xb5/0x140 [ 54.046109] wb_writeback+0x9e4/0xf50 [ 54.049912] ? update_load_avg+0x2d9/0x2570 [ 54.054238] ? writeback_inodes_wb.constprop.48+0x310/0x310 [ 54.059949] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 54.064962] ? widen_string+0xd8/0x2d0 [ 54.068847] ? attach_entity_load_avg+0x850/0x850 [ 54.073687] ? format_decode+0xae0/0xae0 [ 54.077751] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 54.082941] ? graph_lock+0x170/0x170 [ 54.086741] ? string+0x21d/0x2c0 [ 54.090202] ? widen_string+0x2d0/0x2d0 [ 54.094176] ? __lock_acquire+0x7f5/0x5140 [ 54.098414] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 54.103424] ? find_next_bit+0x104/0x130 [ 54.107486] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 54.112496] ? find_next_bit+0x104/0x130 [ 54.116556] ? cpumask_next+0x24/0x30 [ 54.120357] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 54.125372] ? get_nr_dirty_inodes+0xd0/0x130 [ 54.129868] ? get_nr_dirty_pages+0x173/0x1e0 [ 54.134364] ? inode_sleep_on_writeback+0x220/0x220 [ 54.139385] ? wb_workfn+0x4fb/0x1770 [ 54.143186] ? trace_hardirqs_on+0xd/0x10 [ 54.147336] ? __local_bh_enable_ip+0x161/0x230 [ 54.152006] wb_workfn+0xfba/0x1770 [ 54.155644] ? inode_wait_for_writeback+0x40/0x40 [ 54.160485] ? debug_check_no_locks_freed+0x310/0x310 [ 54.165673] ? __lock_is_held+0xb5/0x140 [ 54.169735] ? graph_lock+0x170/0x170 [ 54.173537] ? set_next_entity+0x2ae/0xaf0 [ 54.177767] ? dequeue_entity+0x3f8/0x15c0 [ 54.181999] ? update_load_avg+0x2570/0x2570 [ 54.186410] ? reweight_task+0x130/0x130 [ 54.190470] ? find_held_lock+0x36/0x1c0 [ 54.194527] ? graph_lock+0x170/0x170 [ 54.198327] ? lock_downgrade+0x8e0/0x8e0 [ 54.202474] ? find_held_lock+0x36/0x1c0 [ 54.206534] ? graph_lock+0x170/0x170 [ 54.210330] ? lock_acquire+0x1dc/0x520 [ 54.214299] ? process_one_work+0xb46/0x1b50 [ 54.218707] ? _raw_spin_unlock_irqrestore+0x63/0xc0 [ 54.223812] ? __lock_is_held+0xb5/0x140 [ 54.227879] process_one_work+0xc1e/0x1b50 [ 54.232116] ? finish_task_switch+0x28b/0x810 [ 54.236616] ? pwq_dec_nr_in_flight+0x490/0x490 [ 54.241288] ? __schedule+0x809/0x1e30 [ 54.245188] ? graph_lock+0x170/0x170 [ 54.248987] ? lock_downgrade+0x8e0/0x8e0 [ 54.253141] ? find_held_lock+0x36/0x1c0 [ 54.257209] ? lock_acquire+0x1dc/0x520 [ 54.261179] ? worker_thread+0x41f/0x1440 [ 54.265325] ? lock_downgrade+0x8e0/0x8e0 [ 54.269474] ? lock_release+0xa10/0xa10 [ 54.273447] ? kasan_check_read+0x11/0x20 [ 54.277593] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 54.282186] worker_thread+0x1cc/0x1440 [ 54.286171] ? process_one_work+0x1b50/0x1b50 [ 54.290672] ? graph_lock+0x170/0x170 [ 54.294468] ? find_held_lock+0x36/0x1c0 [ 54.298537] ? find_held_lock+0x36/0x1c0 [ 54.302608] ? __schedule+0x1e30/0x1e30 [ 54.306584] ? do_raw_spin_unlock+0x9e/0x2e0 [ 54.310988] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 54.315571] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 54.320674] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 54.325693] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.331228] ? __kthread_parkme+0x1b7/0x280 [ 54.335551] kthread+0x345/0x410 [ 54.338915] ? process_one_work+0x1b50/0x1b50 [ 54.343404] ? kthread_bind+0x40/0x40 [ 54.347200] ret_from_fork+0x3a/0x50 [ 54.350918] BUG: sleeping function called from invalid context at mm/slab.h:421 [ 54.358355] in_atomic(): 1, irqs_disabled(): 1, pid: 22, name: kworker/u4:1 [ 54.365450] 6 locks held by kworker/u4:1/22: [ 54.369847] #0: (ptrval) ((wq_completion)"writeback"){+.+.}, at: process_one_work+0xaef/0x1b50 [ 54.379410] #1: (ptrval) ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0xb46/0x1b50 [ 54.390014] #2: (ptrval) (&type->s_umount_key#29){++++}, at: trylock_super+0x22/0x110 [ 54.398804] #3: (ptrval) (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0x9a/0x1a0 [ 54.407934] #4: (ptrval) (jbd2_handle){.+.+}, at: start_this_handle+0x581/0x1250 [ 54.416283] #5: (ptrval) (rcu_read_lock){....}, at: find_get_pages_range_tag+0x139/0x1250 [ 54.425417] irq event stamp: 59140 [ 54.428971] hardirqs last enabled at (59139): [] free_unref_page_list+0xc9a/0x12c0 [ 54.438340] hardirqs last disabled at (59140): [] interrupt_entry+0xb5/0xf0 [ 54.447011] softirqs last enabled at (59128): [] __do_softirq+0x778/0xaf5 [ 54.455598] softirqs last disabled at (59121): [] irq_exit+0x1d1/0x200 [ 54.463831] CPU: 0 PID: 22 Comm: kworker/u4:1 Not tainted 4.17.0-rc1+ #12 [ 54.470755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.480123] Workqueue: writeback wb_workfn (flush-8:0) [ 54.485411] Call Trace: [ 54.487992] [ 54.490148] dump_stack+0x1b9/0x294 [ 54.493784] ? dump_stack_print_info.cold.2+0x52/0x52 [ 54.498971] ? print_lock+0xd1/0xd6 [ 54.502598] ? irq_exit+0x1d1/0x200 [ 54.506222] ? irq_exit+0x1d1/0x200 [ 54.509851] ___might_sleep.cold.87+0x11f/0x13a [ 54.514522] ? check_same_owner+0x320/0x320 [ 54.518841] ? lock_release+0xa10/0xa10 [ 54.522810] ? lock_downgrade+0x8e0/0x8e0 [ 54.526957] __might_sleep+0x95/0x190 [ 54.530757] __kmalloc+0x2b9/0x760 [ 54.534291] ? trace_hardirqs_off+0xd/0x10 [ 54.538524] ? _raw_write_unlock_irqrestore+0x63/0xc0 [ 54.543709] ? crng_reseed+0x427/0x920 [ 54.547595] crng_reseed+0x427/0x920 [ 54.551308] ? _extract_entropy.constprop.32+0x150/0x150 [ 54.556760] ? __lock_is_held+0xb5/0x140 [ 54.560828] credit_entropy_bits+0x98d/0xa30 [ 54.565235] ? add_interrupt_randomness+0x494/0x860 [ 54.570248] ? crng_reseed+0x920/0x920 [ 54.574132] ? lock_downgrade+0x8e0/0x8e0 [ 54.578284] ? __mix_pool_bytes+0xde/0x400 [ 54.582520] ? kasan_check_read+0x11/0x20 [ 54.586665] ? do_raw_spin_unlock+0x9e/0x2e0 [ 54.591073] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 54.595655] ? __handle_irq_event_percpu+0x34d/0xad0 [ 54.600760] add_interrupt_randomness+0x494/0x860 [ 54.605602] ? extract_entropy.constprop.29+0x490/0x490 [ 54.610967] ? lock_downgrade+0x8e0/0x8e0 [ 54.615113] ? handle_edge_irq+0x30/0x870 [ 54.619262] handle_irq_event_percpu+0xf9/0x1c0 [ 54.623926] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 54.628506] ? __handle_irq_event_percpu+0xad0/0xad0 [ 54.633605] ? rcu_irq_exit+0xd8/0x110 [ 54.637490] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.643024] handle_irq_event+0xa7/0x135 [ 54.647083] handle_edge_irq+0x20f/0x870 [ 54.651145] handle_irq+0x18c/0x2e7 [ 54.654772] do_IRQ+0x78/0x190 [ 54.657961] common_interrupt+0xf/0xf [ 54.661748] [ 54.663989] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x1/0x20 [ 54.670036] RSP: 0018:ffff8801d941dbf0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffffda [ 54.677742] RAX: ffff8801d94125c0 RBX: 000000007fffffff RCX: ffffffff8194e3dc [ 54.685008] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 54.692277] RBP: ffff8801d941dfb8 R08: ffff8801d94125c0 R09: fffff94000de7f23 [ 54.699539] R10: fffff94000de7f23 R11: ffffea0006f3f91f R12: 0000000000000010 [ 54.706801] R13: 0000000000000001 R14: dffffc0000000000 R15: ffff8801d941df90 [ 54.714086] ? find_get_pages_range_tag+0x6ec/0x1250 [ 54.719192] ? find_get_pages_range_tag+0x70b/0x1250 [ 54.724299] ? unwind_dump+0xa1/0x180 [ 54.728099] ? wait_on_page_bit+0x650/0x650 [ 54.732416] ? find_held_lock+0x36/0x1c0 [ 54.736474] ? print_usage_bug+0xc0/0xc0 [ 54.740534] ? lock_acquire+0x1dc/0x520 [ 54.744505] ? mark_held_locks+0xc9/0x160 [ 54.748649] ? retint_kernel+0x10/0x10 [ 54.752537] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 54.757288] ? retint_kernel+0x10/0x10 [ 54.761172] ? __lock_is_held+0xb5/0x140 [ 54.765229] ? __lock_is_held+0xb5/0x140 [ 54.769293] ? rcu_note_context_switch+0x710/0x710 [ 54.774219] ? check_same_owner+0x320/0x320 [ 54.778541] pagevec_lookup_range_tag+0x40/0x80 [ 54.783210] mpage_prepare_extent_to_map+0x3ff/0x1100 [ 54.788405] ? ext4_block_write_begin+0x1560/0x1560 [ 54.793422] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.798951] ? jbd2__journal_start+0x15a/0xa70 [ 54.803534] ? jbd2_write_access_granted.part.8+0x420/0x420 [ 54.809237] ? rcu_note_context_switch+0x710/0x710 [ 54.814163] ? graph_lock+0x170/0x170 [ 54.817961] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.823494] ? __ext4_journal_start_sb+0x182/0x5e0 [ 54.828435] ext4_writepages+0x186f/0x4030 [ 54.832681] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 54.837431] ? print_usage_bug+0xc0/0xc0 [ 54.841498] ? print_usage_bug+0xc0/0xc0 [ 54.845558] ? __lock_acquire+0x7f5/0x5140 [ 54.849787] ? print_usage_bug+0xc0/0xc0 [ 54.853843] ? rcu_is_watching+0x85/0x140 [ 54.857988] ? __lock_acquire+0x7f5/0x5140 [ 54.862216] ? debug_check_no_locks_freed+0x310/0x310 [ 54.867408] ? debug_check_no_locks_freed+0x310/0x310 [ 54.872591] ? graph_lock+0x170/0x170 [ 54.876396] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 54.881154] do_writepages+0x9a/0x1a0 [ 54.884947] ? ext4_mark_inode_dirty+0xb20/0xb20 [ 54.889699] ? do_writepages+0x9a/0x1a0 [ 54.893673] __writeback_single_inode+0x1e4/0x15c0 [ 54.898603] ? __mark_inode_dirty+0x1530/0x1530 [ 54.903267] ? find_held_lock+0x36/0x1c0 [ 54.907329] ? lock_acquire+0x1dc/0x520 [ 54.911298] ? find_held_lock+0x36/0x1c0 [ 54.915359] ? lock_downgrade+0x8e0/0x8e0 [ 54.919504] ? find_held_lock+0x13f/0x1c0 [ 54.923652] ? kasan_check_read+0x11/0x20 [ 54.927794] ? do_raw_spin_unlock+0x9e/0x2e0 [ 54.932196] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 54.936773] ? __lock_is_held+0xb5/0x140 [ 54.940838] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.946374] ? wbc_attach_and_unlock_inode+0x643/0x9e0 [ 54.951647] ? __writeback_single_inode+0x15c0/0x15c0 [ 54.956831] ? kasan_check_write+0x14/0x20 [ 54.961064] ? do_raw_spin_lock+0xc1/0x200 [ 54.965303] writeback_sb_inodes+0x6f0/0x11a0 [ 54.969806] ? wbc_detach_inode+0x8e0/0x8e0 [ 54.974142] ? find_held_lock+0x13f/0x1c0 [ 54.978295] ? down_read_trylock+0xf2/0x1d0 [ 54.982614] ? trylock_super+0x22/0x110 [ 54.986585] ? downgrade_write+0x290/0x290 [ 54.990819] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.996365] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 55.001901] __writeback_inodes_wb+0x1b0/0x320 [ 55.006484] ? writeback_sb_inodes+0x11a0/0x11a0 [ 55.011234] ? __lock_is_held+0xb5/0x140 [ 55.015302] wb_writeback+0x9e4/0xf50 [ 55.019103] ? update_load_avg+0x2d9/0x2570 [ 55.023428] ? writeback_inodes_wb.constprop.48+0x310/0x310 [ 55.029142] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 55.034153] ? widen_string+0xd8/0x2d0 [ 55.038037] ? attach_entity_load_avg+0x850/0x850 [ 55.042878] ? format_decode+0xae0/0xae0 [ 55.046940] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 55.052132] ? graph_lock+0x170/0x170 [ 55.055929] ? string+0x21d/0x2c0 [ 55.059382] ? widen_string+0x2d0/0x2d0 [ 55.063351] ? __lock_acquire+0x7f5/0x5140 [ 55.067588] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 55.072602] ? find_next_bit+0x104/0x130 [ 55.076663] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 55.081677] ? find_next_bit+0x104/0x130 [ 55.085739] ? cpumask_next+0x24/0x30 [ 55.089540] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 55.094553] ? get_nr_dirty_inodes+0xd0/0x130 [ 55.099050] ? get_nr_dirty_pages+0x173/0x1e0 [ 55.103544] ? inode_sleep_on_writeback+0x220/0x220 [ 55.108560] ? wb_workfn+0x4fb/0x1770 [ 55.112355] ? trace_hardirqs_on+0xd/0x10 [ 55.116500] ? __local_bh_enable_ip+0x161/0x230 [ 55.121166] wb_workfn+0xfba/0x1770 [ 55.124797] ? inode_wait_for_writeback+0x40/0x40 [ 55.129641] ? debug_check_no_locks_freed+0x310/0x310 [ 55.134829] ? __lock_is_held+0xb5/0x140 [ 55.138888] ? graph_lock+0x170/0x170 [ 55.142687] ? set_next_entity+0x2ae/0xaf0 [ 55.146915] ? dequeue_entity+0x3f8/0x15c0 [ 55.151146] ? update_load_avg+0x2570/0x2570 [ 55.155555] ? reweight_task+0x130/0x130 [ 55.159612] ? find_held_lock+0x36/0x1c0 [ 55.163665] ? graph_lock+0x170/0x170 [ 55.167464] ? lock_downgrade+0x8e0/0x8e0 [ 55.171611] ? find_held_lock+0x36/0x1c0 [ 55.175669] ? graph_lock+0x170/0x170 [ 55.179467] ? lock_acquire+0x1dc/0x520 [ 55.183437] ? process_one_work+0xb46/0x1b50 [ 55.187844] ? _raw_spin_unlock_irqrestore+0x63/0xc0 [ 55.192950] ? __lock_is_held+0xb5/0x140 [ 55.197013] process_one_work+0xc1e/0x1b50 [ 55.201246] ? finish_task_switch+0x28b/0x810 [ 55.205742] ? pwq_dec_nr_in_flight+0x490/0x490 [ 55.210415] ? __schedule+0x809/0x1e30 [ 55.214307] ? graph_lock+0x170/0x170 [ 55.218108] ? lock_downgrade+0x8e0/0x8e0 [ 55.222257] ? find_held_lock+0x36/0x1c0 [ 55.226316] ? lock_acquire+0x1dc/0x520 [ 55.230284] ? worker_thread+0x41f/0x1440 [ 55.234426] ? lock_downgrade+0x8e0/0x8e0 [ 55.238570] ? lock_release+0xa10/0xa10 [ 55.242540] ? kasan_check_read+0x11/0x20 [ 55.246686] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 55.251269] worker_thread+0x1cc/0x1440 [ 55.255248] ? process_one_work+0x1b50/0x1b50 [ 55.259743] ? graph_lock+0x170/0x170 [ 55.263537] ? find_held_lock+0x36/0x1c0 [ 55.267600] ? find_held_lock+0x36/0x1c0 [ 55.271668] ? __schedule+0x1e30/0x1e30 [ 55.275640] ? do_raw_spin_unlock+0x9e/0x2e0 [ 55.280047] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 55.284628] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 55.289727] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 55.294743] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 55.300274] ? __kthread_parkme+0x1b7/0x280 [ 55.304594] kthread+0x345/0x410 [ 55.307954] ? process_one_work+0x1b50/0x1b50 [ 55.312444] ? kthread_bind+0x40/0x40 [ 55.316241] ret_from_fork+0x3a/0x50 [ 55.320179] random: crng init done [ 56.828112] can: request_module (can-proto-0) failed. [ 56.836884] can: request_module (can-proto-0) failed. 2018/04/22 19:27:25 kcov=true, comps=true