[ 36.183463][ T26] audit: type=1800 audit(1571109274.962:25): pid=7114 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 36.225426][ T26] audit: type=1800 audit(1571109274.962:26): pid=7114 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 36.245701][ T26] audit: type=1800 audit(1571109274.962:27): pid=7114 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 36.677236][ T7178] sshd (7178) used greatest stack depth: 10032 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. 2019/10/15 03:14:47 fuzzer started 2019/10/15 03:14:49 dialing manager at 10.128.0.105:33683 2019/10/15 03:14:49 syscalls: 2523 2019/10/15 03:14:49 code coverage: enabled 2019/10/15 03:14:49 comparison tracing: enabled 2019/10/15 03:14:49 extra coverage: extra coverage is not supported by the kernel 2019/10/15 03:14:49 setuid sandbox: enabled 2019/10/15 03:14:49 namespace sandbox: enabled 2019/10/15 03:14:49 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/15 03:14:49 fault injection: enabled 2019/10/15 03:14:49 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/15 03:14:49 net packet injection: enabled 2019/10/15 03:14:49 net device setup: enabled 2019/10/15 03:14:49 concurrency sanitizer: enabled syzkaller login: [ 51.027557][ C1] ================================================================== [ 51.035683][ C1] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 51.044625][ C1] [ 51.046970][ C1] write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 0: [ 51.054583][ C1] tick_do_update_jiffies64+0x105/0x260 [ 51.060139][ C1] tick_sched_do_timer+0xd4/0xe0 [ 51.065100][ C1] tick_sched_timer+0x43/0xe0 [ 51.069875][ C1] __hrtimer_run_queues+0x288/0x600 [ 51.075101][ C1] hrtimer_interrupt+0x22a/0x480 [ 51.080019][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 51.085457][ C1] apic_timer_interrupt+0xf/0x20 [ 51.090372][ C1] __kcsan_check_watchpoint+0x91/0x180 [ 51.095843][ C1] __tsan_read4+0x15/0x30 [ 51.100153][ C1] _copy_to_iter+0x40/0xa20 [ 51.104635][ C1] simple_copy_to_iter+0x3f/0x60 [ 51.109564][ C1] __skb_datagram_iter+0xa8/0x470 [ 51.114584][ C1] skb_copy_datagram_iter+0x66/0x170 [ 51.119842][ C1] tcp_recvmsg+0x106c/0x1a30 [ 51.124403][ C1] [ 51.126738][ C1] read to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 1: [ 51.134256][ C1] tick_do_update_jiffies64+0x2b/0x260 [ 51.139709][ C1] tick_sched_do_timer+0xd4/0xe0 [ 51.144623][ C1] tick_sched_timer+0x43/0xe0 [ 51.149276][ C1] __hrtimer_run_queues+0x288/0x600 [ 51.154449][ C1] hrtimer_interrupt+0x22a/0x480 [ 51.159360][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 51.164810][ C1] apic_timer_interrupt+0xf/0x20 [ 51.169737][ C1] __kcsan_check_watchpoint+0x12/0x180 [ 51.175184][ C1] dev_gro_receive+0x93f/0x1190 [ 51.180024][ C1] napi_gro_receive+0x7c/0x330 [ 51.184761][ C1] receive_buf+0x284/0x30b0 [ 51.189237][ C1] virtnet_poll+0x436/0x7d0 [ 51.193725][ C1] net_rx_action+0x3ae/0xa50 [ 51.198283][ C1] [ 51.200593][ C1] Reported by Kernel Concurrency Sanitizer on: [ 51.206723][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.3.0+ #0 [ 51.213733][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.223762][ C1] ================================================================== [ 51.231820][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 51.238390][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.3.0+ #0 [ 51.245381][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.255415][ C1] Call Trace: [ 51.258673][ C1] [ 51.261508][ C1] dump_stack+0xf5/0x159 [ 51.265742][ C1] panic+0x209/0x639 [ 51.269623][ C1] ? dev_gro_receive+0x93f/0x1190 [ 51.274623][ C1] ? vprintk_func+0x8d/0x140 [ 51.279191][ C1] kcsan_report.cold+0xc/0x1b [ 51.283859][ C1] __kcsan_setup_watchpoint+0x3ee/0x510 [ 51.289379][ C1] ? __kcsan_setup_watchpoint+0x96/0x510 [ 51.294985][ C1] __tsan_read8+0x2c/0x30 [ 51.299293][ C1] tick_do_update_jiffies64+0x2b/0x260 [ 51.304727][ C1] tick_sched_do_timer+0xd4/0xe0 [ 51.309642][ C1] tick_sched_timer+0x43/0xe0 [ 51.314315][ C1] __hrtimer_run_queues+0x288/0x600 [ 51.319494][ C1] ? tick_sched_do_timer+0xe0/0xe0 [ 51.324584][ C1] hrtimer_interrupt+0x22a/0x480 [ 51.329514][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 51.334952][ C1] apic_timer_interrupt+0xf/0x20 [ 51.339861][ C1] [ 51.342775][ C1] RIP: 0010:__kcsan_check_watchpoint+0x12/0x180 [ 51.349007][ C1] Code: b8 e4 09 00 00 c3 65 89 3d 5f 97 af 7e c3 66 2e 0f 1f 84 00 00 00 00 00 0f b6 0d d9 57 b1 04 31 c0 84 c9 0f 84 53 01 00 00 55 <41> 89 d0 65 8b 0d cc 97 ae 7e 81 e1 00 01 1f 00 48 89 e5 41 57 41 [ 51.368584][ C1] RSP: 0018:ffffc90000cf3a90 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 51.376985][ C1] RAX: 0000000000000000 RBX: ffffffff85cc8380 RCX: 0000000000000001 [ 51.384931][ C1] RDX: 0000000000000001 RSI: 0000000000000002 RDI: ffff888124e91e4a [ 51.392877][ C1] RBP: ffffc90000cf3aa8 R08: 0000000000000001 R09: 0000888124e91e4b [ 51.400823][ C1] R10: 00000000aaaaaaab R11: ffffffff86042ca0 R12: ffff888124e91e4a [ 51.408775][ C1] R13: ffff888124e91e34 R14: ffff888124e91e00 R15: ffff88811fcadac0 [ 51.416750][ C1] ? __tsan_write2+0x18/0x40 [ 51.421338][ C1] dev_gro_receive+0x93f/0x1190 [ 51.426173][ C1] napi_gro_receive+0x7c/0x330 [ 51.430919][ C1] receive_buf+0x284/0x30b0 [ 51.435451][ C1] ? __tsan_write8+0x32/0x40 [ 51.440029][ C1] ? virtqueue_get_buf_ctx+0x4fd/0x5c0 [ 51.445461][ C1] ? __kcsan_setup_watchpoint+0x96/0x510 [ 51.451066][ C1] ? __kcsan_setup_watchpoint+0x96/0x510 [ 51.456678][ C1] virtnet_poll+0x436/0x7d0 [ 51.461162][ C1] ? __sanitizer_cov_trace_cmp2+0x18/0x20 [ 51.466860][ C1] net_rx_action+0x3ae/0xa50 [ 51.471433][ C1] __do_softirq+0x115/0x33f [ 51.475917][ C1] ? takeover_tasklets+0x250/0x250 [ 51.481006][ C1] run_ksoftirqd+0x46/0x60 [ 51.485398][ C1] smpboot_thread_fn+0x37d/0x4a0 [ 51.490342][ C1] kthread+0x1d4/0x200 [ 51.494404][ C1] ? constant_test_bit.constprop.0+0x30/0x30 [ 51.500369][ C1] ? kthread_bind+0x50/0x50 [ 51.504847][ C1] ret_from_fork+0x1f/0x30 [ 51.510091][ C1] Kernel Offset: disabled [ 51.514427][ C1] Rebooting in 86400 seconds..