[info] Using makefile-style concurrent boot in runlevel 2. [ 42.980929][ T25] audit: type=1800 audit(1574990124.806:21): pid=7423 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 43.015303][ T25] audit: type=1800 audit(1574990124.806:22): pid=7423 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 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 '10.128.1.6' (ECDSA) to the list of known hosts. 2019/11/29 01:15:35 fuzzer started 2019/11/29 01:15:37 dialing manager at 10.128.0.105:46851 2019/11/29 01:15:46 syscalls: 2589 2019/11/29 01:15:46 code coverage: enabled 2019/11/29 01:15:46 comparison tracing: enabled 2019/11/29 01:15:46 extra coverage: extra coverage is not supported by the kernel 2019/11/29 01:15:46 setuid sandbox: enabled 2019/11/29 01:15:46 namespace sandbox: enabled 2019/11/29 01:15:46 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/29 01:15:46 fault injection: enabled 2019/11/29 01:15:46 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/29 01:15:46 net packet injection: enabled 2019/11/29 01:15:46 net device setup: enabled 2019/11/29 01:15:46 concurrency sanitizer: enabled 2019/11/29 01:15:46 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 67.597996][ T7595] KCSAN: could not find function: 'poll_schedule_timeout' 2019/11/29 01:15:56 adding functions to KCSAN blacklist: 'lruvec_lru_size' 'netlink_insert' 'wbt_done' 'ext4_free_inode' '__ext4_new_inode' 'virtqueue_enable_cb_delayed' 'ep_poll' 'wbt_issue' 'taskstats_exit' 'blk_mq_run_hw_queue' 'blk_mq_get_request' 'fat16_ent_put' '__delete_from_page_cache' 'poll_schedule_timeout' 'ip_finish_output2' 'sctp_assoc_migrate' '__find_get_block' 'copy_process' 'tomoyo_supervisor' 'tcp_add_backlog' 'find_next_bit' 'mm_update_next_owner' 'vm_area_dup' 'blk_mq_dispatch_rq_list' 'common_perm_cond' 'run_timer_softirq' 'page_counter_try_charge' 'do_syslog' 'xas_find_marked' 'ext4_has_free_clusters' 'pid_update_inode' 'ext4_free_inodes_count' 'ext4_mark_iloc_dirty' 'timer_clear_idle' 'futex_wait_queue_me' 'tick_nohz_idle_stop_tick' 'generic_write_end' 'do_nanosleep' 'audit_log_start' 'list_lru_add' 'tick_sched_do_timer' 'blk_mq_sched_dispatch_requests' 'process_srcu' 'xas_clear_mark' 'rcu_gp_fqs_loop' 'ext4_nonda_switch' 'exit_signals' '__hrtimer_run_queues' 'pipe_poll' 'find_get_pages_range_tag' 'kauditd_thread' 'sit_tunnel_xmit' 'skb_dequeue' 'tick_do_update_jiffies64' 'rcu_gp_fqs_check_wake' 'generic_fillattr' '__process_echoes' [ 101.894871][ T7580] ================================================================== [ 101.903014][ T7580] BUG: KCSAN: data-race in poll_schedule_timeout.constprop.0 / watchdog [ 101.911316][ T7580] [ 101.913633][ T7580] read to 0xffff888122f7a010 of 8 bytes by task 1069 on cpu 0: [ 101.921177][ T7580] watchdog+0x2c3/0x7c0 [ 101.925323][ T7580] kthread+0x1d4/0x200 [ 101.929384][ T7580] ret_from_fork+0x1f/0x30 [ 101.933784][ T7580] [ 101.936107][ T7580] write to 0xffff888122f7a010 of 8 bytes by task 7580 on cpu 1: [ 101.945723][ T7580] poll_schedule_timeout.constprop.0+0x8f/0xc0 [ 101.951870][ T7580] do_select+0xd7f/0x1020 [ 101.956185][ T7580] core_sys_select+0x381/0x550 [ 101.960933][ T7580] do_pselect.constprop.0+0x11d/0x160 [ 101.966290][ T7580] __x64_sys_pselect6+0x12e/0x170 [ 101.971306][ T7580] do_syscall_64+0xcc/0x370 [ 101.975796][ T7580] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 101.981663][ T7580] [ 101.983992][ T7580] Reported by Kernel Concurrency Sanitizer on: [ 101.990247][ T7580] CPU: 1 PID: 7580 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0 [ 101.998122][ T7580] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.008186][ T7580] ================================================================== [ 102.016240][ T7580] Kernel panic - not syncing: panic_on_warn set ... [ 102.022832][ T7580] CPU: 1 PID: 7580 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0 [ 102.030714][ T7580] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.040768][ T7580] Call Trace: [ 102.044063][ T7580] dump_stack+0x11d/0x181 [ 102.048383][ T7580] panic+0x210/0x640 [ 102.052268][ T7580] ? vprintk_func+0x8d/0x140 [ 102.056852][ T7580] kcsan_report.cold+0xc/0xd [ 102.061437][ T7580] kcsan_setup_watchpoint+0x3fe/0x460 [ 102.066816][ T7580] __tsan_unaligned_write8+0xc4/0x100 [ 102.072174][ T7580] poll_schedule_timeout.constprop.0+0x8f/0xc0 [ 102.078317][ T7580] do_select+0xd7f/0x1020 [ 102.082653][ T7580] ? cpumask_next_and+0x3d/0x50 [ 102.087494][ T7580] ? __rcu_read_unlock+0x66/0x3c0 [ 102.092508][ T7580] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 102.098215][ T7580] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 102.104531][ T7580] ? __rcu_read_unlock+0x66/0x3c0 [ 102.109549][ T7580] ? update_load_avg+0x79/0x5d0 [ 102.114391][ T7580] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 102.120272][ T7580] ? __read_once_size+0x41/0xe0 [ 102.125110][ T7580] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 102.131599][ T7580] ? gup_pgd_range+0x5cb/0x1990 [ 102.136453][ T7580] ? __read_once_size.constprop.0+0x12/0x20 [ 102.142334][ T7580] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 102.148578][ T7580] ? should_fail+0xd4/0x45d [ 102.153070][ T7580] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 102.158952][ T7580] ? __read_once_size+0x41/0xe0 [ 102.163792][ T7580] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 102.170021][ T7580] ? get_futex_key+0x55e/0xa10 [ 102.174776][ T7580] ? __rcu_read_unlock+0x66/0x3c0 [ 102.179804][ T7580] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 102.185687][ T7580] core_sys_select+0x381/0x550 [ 102.190445][ T7580] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 102.196328][ T7580] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 102.202036][ T7580] ? _copy_to_user+0x84/0xb0 [ 102.206618][ T7580] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 102.212498][ T7580] ? __read_once_size+0x5a/0xe0 [ 102.217339][ T7580] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 102.223567][ T7580] ? ktime_get_ts64+0x286/0x2c0 [ 102.228405][ T7580] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 102.234112][ T7580] ? timespec64_add_safe+0xae/0xd0 [ 102.239215][ T7580] do_pselect.constprop.0+0x11d/0x160 [ 102.244580][ T7580] __x64_sys_pselect6+0x12e/0x170 [ 102.249597][ T7580] ? switch_fpu_return+0x11f/0x250 [ 102.254705][ T7580] do_syscall_64+0xcc/0x370 [ 102.259199][ T7580] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 102.265075][ T7580] RIP: 0033:0x45ac23 [ 102.268961][ T7580] Code: 48 89 44 24 08 bf 00 00 00 00 be 00 00 00 00 ba 00 00 00 00 41 ba 00 00 00 00 49 89 e0 41 b9 00 00 00 00 b8 0e 01 00 00 0f 05 <48> 8b 6c 24 10 48 83 c4 18 c3 cc cc cc b8 ba 00 00 00 0f 05 89 44 [ 102.288562][ T7580] RSP: 002b:000000c42004ff08 EFLAGS: 00000202 ORIG_RAX: 000000000000010e [ 102.296971][ T7580] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045ac23 [ 102.304943][ T7580] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 102.312906][ T7580] RBP: 000000c42004ff18 R08: 000000c42004ff08 R09: 0000000000000000 [ 102.320890][ T7580] R10: 0000000000000000 R11: 0000000000000202 R12: 000000000042f0a0 [ 102.328851][ T7580] R13: 00000000000000f1 R14: 0000000000000011 R15: 0000000000000000 [ 102.338220][ T7580] Kernel Offset: disabled [ 102.350462][ T7580] Rebooting in 86400 seconds..