[info] Using makefile-style concurrent boot in runlevel 2. [ 43.823258][ T26] audit: type=1800 audit(1571156651.800:21): pid=7131 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 43.871718][ T26] audit: type=1800 audit(1571156651.800:22): pid=7131 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 '10.128.1.37' (ECDSA) to the list of known hosts. 2019/10/15 16:24:24 fuzzer started 2019/10/15 16:24:26 dialing manager at 10.128.0.105:38903 2019/10/15 16:24:26 syscalls: 2523 2019/10/15 16:24:26 code coverage: enabled 2019/10/15 16:24:26 comparison tracing: enabled 2019/10/15 16:24:26 extra coverage: extra coverage is not supported by the kernel 2019/10/15 16:24:26 setuid sandbox: enabled 2019/10/15 16:24:26 namespace sandbox: enabled 2019/10/15 16:24:26 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/15 16:24:26 fault injection: enabled 2019/10/15 16:24:26 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/15 16:24:26 net packet injection: enabled 2019/10/15 16:24:26 net device setup: enabled 2019/10/15 16:24:26 concurrency sanitizer: enabled syzkaller login: [ 58.757552][ C0] ================================================================== [ 58.765700][ C0] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 58.775711][ C0] [ 58.778053][ C0] write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 1: [ 58.785697][ C0] tick_do_update_jiffies64+0x105/0x260 [ 58.791235][ C0] tick_sched_do_timer+0xd4/0xe0 [ 58.796157][ C0] tick_sched_timer+0x43/0xe0 [ 58.800825][ C0] __hrtimer_run_queues+0x288/0x600 [ 58.806038][ C0] hrtimer_interrupt+0x22a/0x480 [ 58.810962][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 58.816408][ C0] apic_timer_interrupt+0xf/0x20 [ 58.821338][ C0] __kcsan_check_watchpoint+0x27/0x180 [ 58.826796][ C0] __tsan_read4+0x15/0x30 [ 58.831101][ C0] napi_gro_receive+0x3e/0x330 [ 58.835932][ C0] receive_buf+0x284/0x30b0 [ 58.840424][ C0] virtnet_poll+0x436/0x7d0 [ 58.844915][ C0] net_rx_action+0x3ae/0xa50 [ 58.849517][ C0] __do_softirq+0x115/0x33f [ 58.854000][ C0] [ 58.856307][ C0] read to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 0: [ 58.863842][ C0] tick_do_update_jiffies64+0x2b/0x260 [ 58.869371][ C0] tick_sched_do_timer+0xd4/0xe0 [ 58.874292][ C0] tick_sched_timer+0x43/0xe0 [ 58.878949][ C0] __hrtimer_run_queues+0x288/0x600 [ 58.884137][ C0] hrtimer_interrupt+0x22a/0x480 [ 58.889051][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 58.894593][ C0] apic_timer_interrupt+0xf/0x20 [ 58.899514][ C0] __kcsan_check_watchpoint+0xb3/0x180 [ 58.904954][ C0] __tsan_read1+0x15/0x30 [ 58.909261][ C0] nf_nat_ipv4_local_fn+0x14d/0x230 [ 58.914550][ C0] nf_hook_slow+0x83/0x160 [ 58.918971][ C0] __ip_local_out+0x1f7/0x2b0 [ 58.923649][ C0] ip_local_out+0x31/0x90 [ 58.927950][ C0] [ 58.930269][ C0] Reported by Kernel Concurrency Sanitizer on: [ 58.936400][ C0] CPU: 0 PID: 7286 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 58.943575][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.953953][ C0] ================================================================== [ 58.962094][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 58.968668][ C0] CPU: 0 PID: 7286 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 58.975747][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.985948][ C0] Call Trace: [ 58.989230][ C0] [ 58.992067][ C0] dump_stack+0xf5/0x159 [ 58.996378][ C0] panic+0x209/0x639 [ 59.000258][ C0] ? __tsan_read1+0x15/0x30 [ 59.004847][ C0] ? vprintk_func+0x8d/0x140 [ 59.009437][ C0] kcsan_report.cold+0xc/0x1b [ 59.014276][ C0] __kcsan_setup_watchpoint+0x3ee/0x510 [ 59.019806][ C0] ? __kcsan_setup_watchpoint+0x96/0x510 [ 59.025457][ C0] __tsan_read8+0x2c/0x30 [ 59.029801][ C0] tick_do_update_jiffies64+0x2b/0x260 [ 59.035256][ C0] tick_sched_do_timer+0xd4/0xe0 [ 59.040187][ C0] tick_sched_timer+0x43/0xe0 [ 59.044854][ C0] __hrtimer_run_queues+0x288/0x600 [ 59.050045][ C0] ? tick_sched_do_timer+0xe0/0xe0 [ 59.055136][ C0] hrtimer_interrupt+0x22a/0x480 [ 59.060064][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 59.065518][ C0] ? smp_reschedule_interrupt+0x71/0x1d0 [ 59.071137][ C0] apic_timer_interrupt+0xf/0x20 [ 59.076049][ C0] [ 59.078970][ C0] RIP: 0010:__kcsan_check_watchpoint+0xb3/0x180 [ 59.085189][ C0] Code: c1 e8 21 8d 04 40 29 c3 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 [ 59.104780][ C0] RSP: 0018:ffffc9000166f738 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 [ 59.113179][ C0] RAX: 000000000000001d RBX: 0000000000000000 RCX: 0000ffffffffffff [ 59.121131][ C0] RDX: 0000000000000003 RSI: 000000000000001e RDI: 000088811c11e646 [ 59.129101][ C0] RBP: ffffc9000166f760 R08: 0000000000000000 R09: 000088811c11e646 [ 59.137049][ C0] R10: 00000000aaaaaaab R11: ffffffff86042d08 R12: 0000000000000000 [ 59.145011][ C0] R13: ffff88811c11e646 R14: 0000000000000001 R15: 0000000000000038 [ 59.152983][ C0] __tsan_read1+0x15/0x30 [ 59.157299][ C0] nf_nat_ipv4_local_fn+0x14d/0x230 [ 59.162489][ C0] nf_hook_slow+0x83/0x160 [ 59.166884][ C0] ? nf_nat_ipv4_fn+0x160/0x160 [ 59.171711][ C0] __ip_local_out+0x1f7/0x2b0 [ 59.176365][ C0] ? constant_test_bit+0x30/0x30 [ 59.181298][ C0] ip_local_out+0x31/0x90 [ 59.185610][ C0] __ip_queue_xmit+0x3a8/0xa40 [ 59.190367][ C0] ip_queue_xmit+0x45/0x60 [ 59.194785][ C0] __tcp_transmit_skb+0xdeb/0x1cd0 [ 59.199915][ C0] __tcp_send_ack+0x246/0x300 [ 59.204632][ C0] tcp_send_ack+0x34/0x40 [ 59.208968][ C0] tcp_cleanup_rbuf+0x130/0x360 [ 59.213806][ C0] tcp_recvmsg+0x633/0x1a30 [ 59.218296][ C0] inet_recvmsg+0xbb/0x250 [ 59.222710][ C0] ? __tsan_read8+0x2c/0x30 [ 59.227190][ C0] ? inet_sendpage+0x100/0x100 [ 59.231938][ C0] sock_recvmsg+0x92/0xb0 [ 59.236766][ C0] sock_read_iter+0x15f/0x1e0 [ 59.241429][ C0] new_sync_read+0x389/0x4f0 [ 59.246003][ C0] __vfs_read+0xb1/0xc0 [ 59.250142][ C0] vfs_read+0x143/0x2c0 [ 59.254283][ C0] ksys_read+0xd5/0x1b0 [ 59.258428][ C0] __x64_sys_read+0x4c/0x60 [ 59.262926][ C0] do_syscall_64+0xcf/0x2f0 [ 59.267410][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.273278][ C0] RIP: 0033:0x47c530 [ 59.277174][ 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 [ 59.296752][ C0] RSP: 002b:000000c4204dd810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 59.305160][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 59.313108][ C0] RDX: 0000000000001000 RSI: 000000c420054000 RDI: 0000000000000003 [ 59.321055][ C0] RBP: 000000c4204dd868 R08: 0000000000000000 R09: 0000000000000000 [ 59.329015][ C0] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008 [ 59.337383][ C0] R13: 000000c420023180 R14: 0000000000000002 R15: ffffffffffffffff [ 59.346764][ C0] Kernel Offset: disabled [ 59.351443][ C0] Rebooting in 86400 seconds..