[info] Using makefile-style concurrent boot in runlevel 2. [ 42.344732][ T26] audit: type=1800 audit(1576167457.799:21): pid=7550 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 42.397907][ T26] audit: type=1800 audit(1576167457.799:22): pid=7550 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 '10.128.0.244' (ECDSA) to the list of known hosts. 2019/12/12 16:17:47 fuzzer started 2019/12/12 16:17:49 dialing manager at 10.128.0.105:39821 2019/12/12 16:17:49 syscalls: 2689 2019/12/12 16:17:49 code coverage: enabled 2019/12/12 16:17:49 comparison tracing: enabled 2019/12/12 16:17:49 extra coverage: extra coverage is not supported by the kernel 2019/12/12 16:17:49 setuid sandbox: enabled 2019/12/12 16:17:49 namespace sandbox: enabled 2019/12/12 16:17:49 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/12 16:17:49 fault injection: enabled 2019/12/12 16:17:49 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/12 16:17:49 net packet injection: enabled 2019/12/12 16:17:49 net device setup: enabled 2019/12/12 16:17:49 concurrency sanitizer: enabled 2019/12/12 16:17:49 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 64.466773][ T7719] KCSAN: could not find function: 'poll_schedule_timeout' 2019/12/12 16:18:00 adding functions to KCSAN blacklist: 'ep_poll' 'rcu_gp_fqs_check_wake' 'n_tty_receive_buf_common' 'ext4_nonda_switch' 'blk_mq_dispatch_rq_list' 'ktime_get_real_seconds' '__filemap_fdatawrite_range' 'do_fcntl' 'list_lru_count_one' 'rcu_gp_fqs_loop' 'exit_signals' 'virtqueue_disable_cb' '__hrtimer_run_queues' 'add_timer' 'run_timer_softirq' 'echo_char' 'pcpu_alloc' 'futex_wait_queue_me' 'mod_timer' '__snd_rawmidi_transmit_ack' 'copy_process' 'virtqueue_enable_cb_delayed' 'ext4_free_inodes_count' 'page_counter_try_charge' 'kernfs_refresh_inode' 'do_nanosleep' 'kauditd_thread' 'do_syslog' 'ext4_mark_iloc_dirty' 'timer_clear_idle' 'mem_cgroup_select_victim_node' 'atime_needs_update' '__splice_from_pipe' 'tick_sched_do_timer' 'dd_has_work' 'commit_echoes' 'sixpack_receive_buf' 'wbt_issue' 'tcp_add_backlog' 'tick_do_update_jiffies64' 'process_srcu' 'generic_write_end' 'tick_nohz_idle_stop_tick' 'find_get_pages_range_tag' '__remove_hrtimer' 'ext4_itable_unused_count' 'fat_time_unix2fat' 'lruvec_lru_size' 'generic_permission' 'dput' 'vm_area_dup' 'pipe_wait' 'filemap_fault' 'generic_fillattr' 'shmem_file_read_iter' 'xas_clear_mark' 'blk_mq_get_request' 'audit_log_start' 'do_signal_stop' 'sit_tunnel_xmit' 'kcm_rcv_strparser' 'd_instantiate_new' 'pipe_poll' 'taskstats_exit' 'do_exit' 'find_alive_thread' 'blk_mq_sched_dispatch_requests' 'file_update_time' 'ext4_free_inode' 'tomoyo_supervisor' '__ext4_new_inode' 'wbt_done' '__mark_inode_dirty' '__d_lookup_done' 'find_next_bit' 'pid_update_inode' 'ext4_has_free_clusters' 'poll_schedule_timeout' 'xas_find_marked' '__delete_from_page_cache' [ 235.953659][ T7709] ================================================================== [ 235.962013][ T7709] BUG: KCSAN: data-race in __acct_update_integrals / mmap_region [ 235.969712][ T7709] [ 235.972035][ T7709] read to 0xffff8881240d69c0 of 8 bytes by interrupt on cpu 0: [ 235.979574][ T7709] __acct_update_integrals+0x1b1/0x1e0 [ 235.985020][ T7709] acct_account_cputime+0x4e/0x60 [ 235.990049][ T7709] account_user_time+0xb2/0xc0 [ 235.995283][ T7709] irqtime_account_process_tick.isra.0+0x14e/0x1b0 [ 236.002746][ T7709] account_process_tick+0x14e/0x190 [ 236.007935][ T7709] update_process_times+0x29/0x80 [ 236.012950][ T7709] tick_sched_handle+0x75/0x100 [ 236.019140][ T7709] tick_sched_timer+0x58/0xe0 [ 236.023897][ T7709] __hrtimer_run_queues+0x274/0x5f0 [ 236.029522][ T7709] hrtimer_interrupt+0x22a/0x480 [ 236.034455][ T7709] smp_apic_timer_interrupt+0xdc/0x280 [ 236.040093][ T7709] apic_timer_interrupt+0xf/0x20 [ 236.046238][ T7709] [ 236.049184][ T7709] write to 0xffff8881240d69c0 of 8 bytes by task 7709 on cpu 1: [ 236.056920][ T7709] mmap_region+0x328/0xd50 [ 236.061366][ T7709] do_mmap+0x6d4/0xba0 [ 236.065433][ T7709] vm_mmap_pgoff+0x12d/0x190 [ 236.070101][ T7709] ksys_mmap_pgoff+0x99/0x420 [ 236.074788][ T7709] __x64_sys_mmap+0x2e/0x40 [ 236.079414][ T7709] do_syscall_64+0xcc/0x370 [ 236.083902][ T7709] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 236.089815][ T7709] [ 236.092122][ T7709] Reported by Kernel Concurrency Sanitizer on: [ 236.098277][ T7709] CPU: 1 PID: 7709 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0 [ 236.106488][ T7709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 236.116635][ T7709] ================================================================== [ 236.124681][ T7709] Kernel panic - not syncing: panic_on_warn set ... [ 236.131263][ T7709] CPU: 1 PID: 7709 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0 [ 236.139653][ T7709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 236.150012][ T7709] Call Trace: [ 236.153421][ T7709] dump_stack+0x11d/0x181 [ 236.157836][ T7709] panic+0x210/0x640 [ 236.161732][ T7709] ? __read_once_size+0x5a/0xe0 [ 236.166756][ T7709] ? vprintk_func+0x8d/0x140 [ 236.171536][ T7709] kcsan_report.cold+0xc/0xd [ 236.176144][ T7709] kcsan_setup_watchpoint+0x3fe/0x460 [ 236.181619][ T7709] __tsan_unaligned_write8+0xc4/0x100 [ 236.187149][ T7709] mmap_region+0x328/0xd50 [ 236.191848][ T7709] do_mmap+0x6d4/0xba0 [ 236.196631][ T7709] vm_mmap_pgoff+0x12d/0x190 [ 236.201323][ T7709] ksys_mmap_pgoff+0x99/0x420 [ 236.206089][ T7709] __x64_sys_mmap+0x2e/0x40 [ 236.210593][ T7709] do_syscall_64+0xcc/0x370 [ 236.215082][ T7709] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 236.220964][ T7709] RIP: 0033:0x45b014 [ 236.224863][ T7709] Code: 03 cc cc cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 44 8b 54 24 1c 44 8b 44 24 20 44 8b 4c 24 24 b8 09 00 00 00 0f 05 <48> 3d 01 f0 ff ff 76 15 48 f7 d0 48 ff c0 48 c7 44 24 28 00 00 00 [ 236.244548][ T7709] RSP: 002b:000000c42014dc20 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 236.253136][ T7709] RAX: ffffffffffffffda RBX: 0000000000000022 RCX: 000000000045b014 [ 236.261099][ T7709] RDX: 0000000000000003 RSI: 0000000000100000 RDI: 000000c4392f0000 [ 236.269067][ T7709] RBP: 000000c42014dc90 R08: 00000000ffffffff R09: 0000000000000000 [ 236.277017][ T7709] R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000000000 [ 236.284966][ T7709] R13: 0000000000000004 R14: 0000000000000004 R15: 0000000000000004 [ 236.294404][ T7709] Kernel Offset: disabled [ 236.298733][ T7709] Rebooting in 86400 seconds..