[info] Using makefile-style concurrent boot in runlevel 2. [ 45.399446][ T26] audit: type=1800 audit(1573980487.672:21): pid=7533 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 45.461948][ T26] audit: type=1800 audit(1573980487.682:22): pid=7533 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 '10.128.10.38' (ECDSA) to the list of known hosts. 2019/11/17 08:48:15 fuzzer started 2019/11/17 08:48:17 dialing manager at 10.128.0.105:33487 2019/11/17 08:48:17 syscalls: 2566 2019/11/17 08:48:17 code coverage: enabled 2019/11/17 08:48:17 comparison tracing: enabled 2019/11/17 08:48:17 extra coverage: extra coverage is not supported by the kernel 2019/11/17 08:48:17 setuid sandbox: enabled 2019/11/17 08:48:17 namespace sandbox: enabled 2019/11/17 08:48:17 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/17 08:48:17 fault injection: enabled 2019/11/17 08:48:17 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/17 08:48:17 net packet injection: enabled 2019/11/17 08:48:17 net device setup: enabled 2019/11/17 08:48:17 concurrency sanitizer: enabled 2019/11/17 08:48:17 devlink PCI setup: PCI device 0000:00:10.0 is not available 2019/11/17 08:48:18 adding functions to KCSAN blacklist: 'tomoyo_supervisor' 'ext4_free_inode' 'run_timer_softirq' 'rcu_gp_fqs_check_wake' '__hrtimer_run_queues' 'ep_poll' 'mod_timer' 'tcp_add_backlog' '__ext4_new_inode' syzkaller login: [ 57.171565][ T0] ================================================================== [ 57.179689][ T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event [ 57.188246][ T0] [ 57.190607][ T0] write to 0xffffffff85cb3ad0 of 4 bytes by task 0 on cpu 1: [ 57.197996][ T0] tick_nohz_idle_stop_tick+0x525/0x670 [ 57.203522][ T0] do_idle+0x1a5/0x280 [ 57.207585][ T0] cpu_startup_entry+0x1b/0x20 [ 57.212352][ T0] start_secondary+0x168/0x1b0 [ 57.217131][ T0] secondary_startup_64+0xa4/0xb0 [ 57.222165][ T0] [ 57.224504][ T0] read to 0xffffffff85cb3ad0 of 4 bytes by task 0 on cpu 0: [ 57.231833][ T0] tick_nohz_next_event+0x19d/0x370 [ 57.237046][ T0] tick_nohz_idle_stop_tick+0x3c2/0x670 [ 57.242593][ T0] do_idle+0x1a5/0x280 [ 57.246668][ T0] cpu_startup_entry+0x1b/0x20 [ 57.251449][ T0] rest_init+0xec/0xf6 [ 57.255519][ T0] arch_call_rest_init+0x17/0x37 [ 57.260463][ T0] start_kernel+0x838/0x85e [ 57.265006][ T0] x86_64_start_reservations+0x29/0x2b [ 57.270481][ T0] x86_64_start_kernel+0x72/0x76 [ 57.275429][ T0] secondary_startup_64+0xa4/0xb0 [ 57.280445][ T0] [ 57.282758][ T0] Reported by Kernel Concurrency Sanitizer on: [ 57.288930][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc7+ #0 [ 57.296031][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.306189][ T0] ================================================================== [ 57.314268][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 57.321041][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc7+ #0 [ 57.328156][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.338223][ T0] Call Trace: [ 57.341553][ T0] dump_stack+0x11d/0x181 [ 57.345908][ T0] panic+0x210/0x640 [ 57.349845][ T0] ? vprintk_func+0x8d/0x140 [ 57.354481][ T0] kcsan_report.cold+0xc/0xd [ 57.359099][ T0] kcsan_setup_watchpoint+0x3fe/0x460 [ 57.364481][ T0] __tsan_read4+0xc6/0x100 [ 57.368921][ T0] tick_nohz_next_event+0x19d/0x370 [ 57.374136][ T0] tick_nohz_idle_stop_tick+0x3c2/0x670 [ 57.379793][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.386068][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.392416][ T0] ? debug_smp_processor_id+0x4c/0x172 [ 57.397906][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.404175][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.410428][ T0] do_idle+0x1a5/0x280 [ 57.414547][ T0] cpu_startup_entry+0x1b/0x20 [ 57.419358][ T0] rest_init+0xec/0xf6 [ 57.423459][ T0] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 57.430670][ T0] arch_call_rest_init+0x17/0x37 [ 57.435710][ T0] start_kernel+0x838/0x85e [ 57.440235][ T0] x86_64_start_reservations+0x29/0x2b [ 57.445706][ T0] x86_64_start_kernel+0x72/0x76 [ 57.450638][ T0] secondary_startup_64+0xa4/0xb0 [ 57.456912][ T0] Kernel Offset: disabled [ 57.461253][ T0] Rebooting in 86400 seconds..