[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 34.264082][ T25] audit: type=1800 audit(1570708174.864:25): pid=7035 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 34.301092][ T25] audit: type=1800 audit(1570708174.864:26): pid=7035 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 34.333855][ T25] audit: type=1800 audit(1570708174.864:27): pid=7035 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. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.19' (ECDSA) to the list of known hosts. 2019/10/10 11:49:44 fuzzer started 2019/10/10 11:49:45 dialing manager at 10.128.0.105:34287 2019/10/10 11:49:45 syscalls: 2523 2019/10/10 11:49:45 code coverage: enabled 2019/10/10 11:49:45 comparison tracing: enabled 2019/10/10 11:49:45 extra coverage: extra coverage is not supported by the kernel 2019/10/10 11:49:45 setuid sandbox: enabled 2019/10/10 11:49:45 namespace sandbox: enabled 2019/10/10 11:49:45 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/10 11:49:45 fault injection: enabled 2019/10/10 11:49:45 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/10 11:49:45 net packet injection: enabled 2019/10/10 11:49:45 net device setup: enabled 2019/10/10 11:49:45 concurrency sanitizer: enabled syzkaller login: [ 45.636659][ T7183] ================================================================== [ 45.644802][ T7183] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 45.652718][ T7183] [ 45.655026][ T7183] write to 0xffffffff8603db08 of 280 bytes by interrupt on cpu 1: [ 45.662809][ T7183] timekeeping_advance+0x893/0xd80 [ 45.667919][ T7183] update_wall_time+0x19/0x20 [ 45.672571][ T7183] tick_do_update_jiffies64+0x1ae/0x260 [ 45.678122][ T7183] tick_sched_do_timer+0xd4/0xe0 [ 45.683120][ T7183] tick_sched_timer+0x43/0xe0 [ 45.687784][ T7183] __hrtimer_run_queues+0x288/0x600 [ 45.692957][ T7183] hrtimer_interrupt+0x22a/0x480 [ 45.697885][ T7183] smp_apic_timer_interrupt+0xdc/0x280 [ 45.703333][ T7183] apic_timer_interrupt+0xf/0x20 [ 45.708248][ T7183] __sanitizer_cov_trace_pc+0x1/0x50 [ 45.713512][ T7183] packet_rcv_spkt+0x2e2/0x350 [ 45.718272][ T7183] __netif_receive_skb_core+0xe13/0x1a90 [ 45.723878][ T7183] __netif_receive_skb_one_core+0x67/0xe0 [ 45.729571][ T7183] __netif_receive_skb+0x37/0xf0 [ 45.734477][ T7183] [ 45.736797][ T7183] read to 0xffffffff8603db80 of 8 bytes by task 7183 on cpu 0: [ 45.744353][ T7183] ktime_get_seconds+0x49/0x60 [ 45.749108][ T7183] tcp_rcv_established+0xeeb/0xf50 [ 45.754201][ T7183] tcp_v4_do_rcv+0x381/0x4e0 [ 45.758772][ T7183] __release_sock+0x135/0x1e0 [ 45.763576][ T7183] release_sock+0x61/0x160 [ 45.767976][ T7183] tcp_recvmsg+0x63b/0x1a30 [ 45.772457][ T7183] inet_recvmsg+0xbb/0x250 [ 45.776850][ T7183] sock_recvmsg+0x92/0xb0 [ 45.781158][ T7183] sock_read_iter+0x15f/0x1e0 [ 45.785816][ T7183] new_sync_read+0x389/0x4f0 [ 45.790385][ T7183] __vfs_read+0xb1/0xc0 [ 45.794521][ T7183] vfs_read+0x143/0x2c0 [ 45.798664][ T7183] ksys_read+0xd5/0x1b0 [ 45.802800][ T7183] [ 45.805111][ T7183] Reported by Kernel Concurrency Sanitizer on: [ 45.811241][ T7183] CPU: 0 PID: 7183 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 45.818320][ T7183] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.828347][ T7183] ================================================================== [ 45.836377][ T7183] Kernel panic - not syncing: panic_on_warn set ... [ 45.842949][ T7183] CPU: 0 PID: 7183 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 45.850037][ T7183] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.860067][ T7183] Call Trace: [ 45.863349][ T7183] dump_stack+0xf5/0x159 [ 45.867572][ T7183] panic+0x209/0x639 [ 45.871456][ T7183] ? sock_read_iter+0x15f/0x1e0 [ 45.876283][ T7183] ? vprintk_func+0x8d/0x140 [ 45.880851][ T7183] kcsan_report.cold+0xc/0x1b [ 45.885514][ T7183] __kcsan_setup_watchpoint+0x3ee/0x510 [ 45.891047][ T7183] __tsan_read8+0x2c/0x30 [ 45.895359][ T7183] ktime_get_seconds+0x49/0x60 [ 45.900104][ T7183] tcp_rcv_established+0xeeb/0xf50 [ 45.905209][ T7183] ? ipv4_dst_check+0xc6/0xf0 [ 45.909865][ T7183] tcp_v4_do_rcv+0x381/0x4e0 [ 45.914463][ T7183] __release_sock+0x135/0x1e0 [ 45.919122][ T7183] release_sock+0x61/0x160 [ 45.923514][ T7183] tcp_recvmsg+0x63b/0x1a30 [ 45.928006][ T7183] inet_recvmsg+0xbb/0x250 [ 45.932400][ T7183] ? __tsan_read8+0x2c/0x30 [ 45.936881][ T7183] ? inet_sendpage+0x100/0x100 [ 45.941631][ T7183] sock_recvmsg+0x92/0xb0 [ 45.945936][ T7183] sock_read_iter+0x15f/0x1e0 [ 45.950605][ T7183] new_sync_read+0x389/0x4f0 [ 45.955189][ T7183] __vfs_read+0xb1/0xc0 [ 45.959323][ T7183] vfs_read+0x143/0x2c0 [ 45.963458][ T7183] ksys_read+0xd5/0x1b0 [ 45.968287][ T7183] __x64_sys_read+0x4c/0x60 [ 45.972778][ T7183] do_syscall_64+0xcf/0x2f0 [ 45.977266][ T7183] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 45.983133][ T7183] RIP: 0033:0x47c530 [ 45.987015][ T7183] 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 [ 46.006690][ T7183] RSP: 002b:000000c4203b37d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 46.015075][ T7183] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 46.023033][ T7183] RDX: 0000000000001000 RSI: 000000c420136000 RDI: 0000000000000003 [ 46.030983][ T7183] RBP: 000000c4203b3830 R08: 0000000000000000 R09: 0000000000000000 [ 46.038933][ T7183] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000010 [ 46.046896][ T7183] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 46.056298][ T7183] Kernel Offset: disabled [ 46.060622][ T7183] Rebooting in 86400 seconds..