[info] Using makefile-style concurrent boot in runlevel 2. [ 51.475302][ T27] audit: type=1800 audit(1581284153.117:21): pid=7763 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 51.522162][ T27] audit: type=1800 audit(1581284153.117:22): pid=7763 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 '10.128.0.116' (ECDSA) to the list of known hosts. 2020/02/09 21:36:04 fuzzer started 2020/02/09 21:36:05 dialing manager at 10.128.0.105:36345 2020/02/09 21:36:05 syscalls: 2904 2020/02/09 21:36:05 code coverage: enabled 2020/02/09 21:36:05 comparison tracing: enabled 2020/02/09 21:36:05 extra coverage: enabled 2020/02/09 21:36:05 setuid sandbox: enabled 2020/02/09 21:36:05 namespace sandbox: enabled 2020/02/09 21:36:05 Android sandbox: /sys/fs/selinux/policy does not exist 2020/02/09 21:36:05 fault injection: enabled 2020/02/09 21:36:05 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/02/09 21:36:05 net packet injection: enabled 2020/02/09 21:36:05 net device setup: enabled 2020/02/09 21:36:05 concurrency sanitizer: enabled 2020/02/09 21:36:05 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 64.382152][ T0] ================================================================== [ 64.390328][ T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer [ 64.398972][ T0] [ 64.401322][ T0] write to 0xffffffff85ebb050 of 4 bytes by interrupt on cpu 0: [ 64.408956][ T0] tick_sched_do_timer+0xc0/0xe0 [ 64.413898][ T0] tick_sched_timer+0x43/0xe0 [ 64.418584][ T0] __hrtimer_run_queues+0x274/0x5f0 [ 64.423796][ T0] hrtimer_interrupt+0x22a/0x480 [ 64.428782][ T0] smp_apic_timer_interrupt+0xdc/0x280 [ 64.434280][ T0] apic_timer_interrupt+0xf/0x20 [ 64.439232][ T0] __tsan_read4+0x0/0x100 [ 64.443575][ T0] tcp_v4_rcv+0x958/0x1d20 [ 64.447999][ T0] ip_protocol_deliver_rcu+0x4d/0x420 [ 64.453383][ T0] ip_local_deliver_finish+0x110/0x140 [ 64.458846][ T0] ip_local_deliver+0x133/0x210 [ 64.463844][ T0] ip_sublist_rcv_finish+0xf8/0x140 [ 64.469034][ T0] ip_sublist_rcv+0x418/0x550 [ 64.473712][ T0] ip_list_rcv+0x2f5/0x322 [ 64.478139][ T0] __netif_receive_skb_list_core+0x350/0x5c0 [ 64.484130][ T0] netif_receive_skb_list_internal+0x5d8/0x830 [ 64.490285][ T0] gro_normal_list.part.0+0x3a/0xb0 [ 64.495625][ T0] gro_normal_one+0x162/0x170 [ 64.500323][ T0] napi_gro_receive+0x288/0x300 [ 64.505175][ T0] receive_buf+0x284/0x30b0 [ 64.509687][ T0] virtnet_poll+0x436/0x7d0 [ 64.514203][ T0] net_rx_action+0x3ae/0xa90 [ 64.518821][ T0] __do_softirq+0x115/0x33f [ 64.523474][ T0] irq_exit+0xbb/0xe0 [ 64.527591][ T0] do_IRQ+0x81/0x130 [ 64.531497][ T0] ret_from_intr+0x0/0x21 [ 64.535812][ T0] [ 64.538197][ T0] read to 0xffffffff85ebb050 of 4 bytes by task 0 on cpu 1: [ 64.545499][ T0] tick_nohz_idle_stop_tick+0x193/0x670 [ 64.551053][ T0] do_idle+0x1b8/0x290 [ 64.555253][ T0] cpu_startup_entry+0x1b/0x20 [ 64.560030][ T0] start_secondary+0x168/0x1b0 [ 64.564937][ T0] secondary_startup_64+0xa4/0xb0 [ 64.569951][ T0] [ 64.572348][ T0] Reported by Kernel Concurrency Sanitizer on: [ 64.578530][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc1-syzkaller #0 [ 64.586419][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.596576][ T0] ================================================================== [ 64.604627][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 64.611223][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc1-syzkaller #0 [ 64.619112][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.629192][ T0] Call Trace: [ 64.632509][ T0] dump_stack+0x11d/0x181 [ 64.636976][ T0] panic+0x210/0x640 [ 64.640890][ T0] ? vprintk_func+0x8d/0x140 [ 64.645610][ T0] kcsan_report.cold+0xc/0x15 [ 64.650302][ T0] kcsan_setup_watchpoint+0x2e2/0x380 [ 64.655686][ T0] __tsan_read4+0xc6/0x100 [ 64.660104][ T0] tick_nohz_idle_stop_tick+0x193/0x670 [ 64.665761][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.672019][ T0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.678273][ T0] do_idle+0x1b8/0x290 [ 64.682344][ T0] ? complete+0x44/0x50 [ 64.686499][ T0] cpu_startup_entry+0x1b/0x20 [ 64.691281][ T0] start_secondary+0x168/0x1b0 [ 64.696056][ T0] secondary_startup_64+0xa4/0xb0 [ 64.702810][ T0] Kernel Offset: disabled [ 64.707149][ T0] Rebooting in 86400 seconds..