[ 40.295235][ T25] audit: type=1800 audit(1571052717.369:21): pid=7245 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 40.334979][ T25] audit: type=1800 audit(1571052717.369:22): pid=7245 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 res=0 [ 40.366068][ T25] audit: type=1800 audit(1571052717.369:23): pid=7245 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2475 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 '10.128.10.30' (ECDSA) to the list of known hosts. 2019/10/14 11:32:09 fuzzer started 2019/10/14 11:32:10 dialing manager at 10.128.0.105:43961 2019/10/14 11:32:10 syscalls: 2523 2019/10/14 11:32:10 code coverage: enabled 2019/10/14 11:32:10 comparison tracing: enabled 2019/10/14 11:32:10 extra coverage: extra coverage is not supported by the kernel 2019/10/14 11:32:10 setuid sandbox: enabled 2019/10/14 11:32:10 namespace sandbox: enabled 2019/10/14 11:32:10 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/14 11:32:10 fault injection: enabled 2019/10/14 11:32:10 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/14 11:32:10 net packet injection: enabled 2019/10/14 11:32:10 net device setup: enabled 2019/10/14 11:32:10 concurrency sanitizer: enabled syzkaller login: [ 53.562483][ C0] ================================================================== [ 53.571650][ C0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 53.580878][ C0] [ 53.583196][ C0] write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 1: [ 53.590914][ C0] tick_do_update_jiffies64+0x105/0x260 [ 53.596643][ C0] tick_sched_do_timer+0xd4/0xe0 [ 53.602030][ C0] tick_sched_timer+0x43/0xe0 [ 53.606842][ C0] __hrtimer_run_queues+0x288/0x600 [ 53.612049][ C0] hrtimer_interrupt+0x22a/0x480 [ 53.617005][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 53.622725][ C0] apic_timer_interrupt+0xf/0x20 [ 53.627651][ C0] __kcsan_check_watchpoint+0xa3/0x180 [ 53.633266][ C0] __tsan_write2+0x18/0x40 [ 53.637680][ C0] dev_gro_receive+0xde1/0x1190 [ 53.642561][ C0] napi_gro_receive+0x7c/0x330 [ 53.647316][ C0] receive_buf+0x284/0x30b0 [ 53.651802][ C0] virtnet_poll+0x436/0x7d0 [ 53.656504][ C0] net_rx_action+0x3ae/0xa50 [ 53.661249][ C0] [ 53.663582][ C0] read to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 0: [ 53.671473][ C0] tick_do_update_jiffies64+0x2b/0x260 [ 53.677275][ C0] tick_sched_do_timer+0xd4/0xe0 [ 53.682202][ C0] tick_sched_timer+0x43/0xe0 [ 53.686880][ C0] __hrtimer_run_queues+0x288/0x600 [ 53.692077][ C0] hrtimer_interrupt+0x22a/0x480 [ 53.697016][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 53.703649][ C0] apic_timer_interrupt+0xf/0x20 [ 53.709408][ C0] __kcsan_check_watchpoint+0xbb/0x180 [ 53.715568][ C0] __tsan_read8+0x15/0x30 [ 53.719889][ C0] tcp_rcv_established+0xb57/0xf50 [ 53.725131][ C0] tcp_v4_do_rcv+0x381/0x4e0 [ 53.729711][ C0] __release_sock+0x135/0x1e0 [ 53.734502][ C0] release_sock+0x61/0x160 [ 53.739601][ C0] [ 53.741907][ C0] Reported by Kernel Concurrency Sanitizer on: [ 53.748144][ C0] CPU: 0 PID: 7398 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 53.755487][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.766497][ C0] ================================================================== [ 53.774665][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 53.781355][ C0] CPU: 0 PID: 7398 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 53.788724][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.798764][ C0] Call Trace: [ 53.802115][ C0] [ 53.804955][ C0] dump_stack+0xf5/0x159 [ 53.809187][ C0] panic+0x209/0x639 [ 53.813063][ C0] ? __tsan_read8+0x15/0x30 [ 53.817564][ C0] ? vprintk_func+0x8d/0x140 [ 53.822146][ C0] kcsan_report.cold+0xc/0x1b [ 53.826810][ C0] __kcsan_setup_watchpoint+0x3ee/0x510 [ 53.832333][ C0] ? __kcsan_setup_watchpoint+0x96/0x510 [ 53.837969][ C0] __tsan_read8+0x2c/0x30 [ 53.842295][ C0] tick_do_update_jiffies64+0x2b/0x260 [ 53.847741][ C0] tick_sched_do_timer+0xd4/0xe0 [ 53.852676][ C0] tick_sched_timer+0x43/0xe0 [ 53.857352][ C0] __hrtimer_run_queues+0x288/0x600 [ 53.862535][ C0] ? tick_sched_do_timer+0xe0/0xe0 [ 53.867913][ C0] hrtimer_interrupt+0x22a/0x480 [ 53.872838][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 53.878279][ C0] apic_timer_interrupt+0xf/0x20 [ 53.883462][ C0] [ 53.886422][ C0] RIP: 0010:__kcsan_check_watchpoint+0xbb/0x180 [ 53.893077][ C0] Code: 8d 44 1e ff 41 89 c3 41 c1 fb 1f 41 c1 eb 1a 44 01 d8 83 e0 3f 44 29 d8 48 98 4c 8d 1c c5 20 2c 04 86 48 8b 04 c5 20 2c 04 86 <48> 83 f8 01 76 2c 48 89 c3 49 89 c7 48 c1 eb 31 49 21 cf 81 e3 ff [ 53.913096][ C0] RSP: 0018:ffffc9000161b940 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 53.921593][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000ffffffffffff [ 53.929554][ C0] RDX: 0000000000000003 RSI: 000000000000002b RDI: 00008881233ab270 [ 53.937512][ C0] RBP: ffffc9000161b968 R08: 0000000000000000 R09: 00008881233ab277 [ 53.945466][ C0] R10: 00000000aaaaaaab R11: ffffffff86042d70 R12: 0000000000000000 [ 53.953419][ C0] R13: ffff8881233ab270 R14: 0000000000000008 R15: 000000000000d112 [ 53.961417][ C0] __tsan_read8+0x15/0x30 [ 53.965945][ C0] tcp_rcv_established+0xb57/0xf50 [ 53.971055][ C0] ? ipv4_dst_check+0xc6/0xf0 [ 53.975719][ C0] tcp_v4_do_rcv+0x381/0x4e0 [ 53.980305][ C0] __release_sock+0x135/0x1e0 [ 53.985163][ C0] release_sock+0x61/0x160 [ 53.989566][ C0] tcp_recvmsg+0x63b/0x1a30 [ 53.994066][ C0] inet_recvmsg+0xbb/0x250 [ 53.998483][ C0] ? __tsan_read8+0x2c/0x30 [ 54.003123][ C0] ? inet_sendpage+0x100/0x100 [ 54.008902][ C0] sock_recvmsg+0x92/0xb0 [ 54.013389][ C0] sock_read_iter+0x15f/0x1e0 [ 54.018059][ C0] new_sync_read+0x389/0x4f0 [ 54.022995][ C0] __vfs_read+0xb1/0xc0 [ 54.027299][ C0] vfs_read+0x143/0x2c0 [ 54.031531][ C0] ksys_read+0xd5/0x1b0 [ 54.035701][ C0] __x64_sys_read+0x4c/0x60 [ 54.040207][ C0] do_syscall_64+0xcf/0x2f0 [ 54.044710][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 54.050604][ C0] RIP: 0033:0x47c530 [ 54.054489][ C0] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 54.074081][ C0] RSP: 002b:000000c42032f7d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 54.082480][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 54.090463][ C0] RDX: 0000000000001000 RSI: 000000c4202de000 RDI: 0000000000000003 [ 54.098420][ C0] RBP: 000000c42032f830 R08: 0000000000000000 R09: 0000000000000000 [ 54.106405][ C0] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000080 [ 54.114375][ C0] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 54.123999][ C0] Kernel Offset: disabled [ 54.128345][ C0] Rebooting in 86400 seconds..