[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 33.936982][ T25] audit: type=1800 audit(1570589639.675:25): pid=7071 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 33.964088][ T25] audit: type=1800 audit(1570589639.675:26): pid=7071 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 33.990965][ T25] audit: type=1800 audit(1570589639.675:27): pid=7071 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 '10.128.0.64' (ECDSA) to the list of known hosts. 2019/10/09 02:54:15 fuzzer started 2019/10/09 02:54:16 dialing manager at 10.128.0.105:35069 2019/10/09 02:54:16 syscalls: 2523 2019/10/09 02:54:16 code coverage: enabled 2019/10/09 02:54:16 comparison tracing: enabled 2019/10/09 02:54:16 extra coverage: extra coverage is not supported by the kernel 2019/10/09 02:54:16 setuid sandbox: enabled 2019/10/09 02:54:16 namespace sandbox: enabled 2019/10/09 02:54:16 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/09 02:54:16 fault injection: enabled 2019/10/09 02:54:16 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/09 02:54:16 net packet injection: enabled 2019/10/09 02:54:16 net device setup: enabled 2019/10/09 02:54:16 concurrency sanitizer: enabled syzkaller login: [ 51.145110][ T7240] ================================================================== [ 51.153233][ T7240] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 51.161161][ T7240] [ 51.163465][ T7240] write to 0xffffffff8603db08 of 280 bytes by interrupt on cpu 1: [ 51.171242][ T7240] timekeeping_advance+0x893/0xd80 [ 51.176325][ T7240] update_wall_time+0x19/0x20 [ 51.180976][ T7240] tick_do_update_jiffies64+0x1ae/0x260 [ 51.186494][ T7240] tick_sched_do_timer+0xd4/0xe0 [ 51.191425][ T7240] tick_sched_timer+0x43/0xe0 [ 51.196080][ T7240] __hrtimer_run_queues+0x288/0x600 [ 51.201252][ T7240] hrtimer_interrupt+0x22a/0x480 [ 51.206167][ T7240] smp_apic_timer_interrupt+0xdc/0x280 [ 51.211599][ T7240] apic_timer_interrupt+0xf/0x20 [ 51.216535][ T7240] __sanitizer_cov_trace_pc+0x14/0x50 [ 51.222317][ T7240] nf_hook_slow+0x4f/0x160 [ 51.226707][ T7240] ip_local_deliver+0x1e5/0x210 [ 51.231542][ T7240] ip_rcv_finish+0x121/0x160 [ 51.236104][ T7240] ip_rcv+0x18f/0x1a0 [ 51.240052][ T7240] [ 51.242362][ T7240] read to 0xffffffff8603db80 of 8 bytes by task 7240 on cpu 0: [ 51.249874][ T7240] ktime_get_seconds+0x49/0x60 [ 51.254636][ T7240] tcp_rcv_established+0xeeb/0xf50 [ 51.259720][ T7240] tcp_v4_do_rcv+0x381/0x4e0 [ 51.264285][ T7240] __release_sock+0x135/0x1e0 [ 51.268935][ T7240] release_sock+0x61/0x160 [ 51.273325][ T7240] tcp_recvmsg+0x63b/0x1a30 [ 51.277802][ T7240] inet_recvmsg+0xbb/0x250 [ 51.282193][ T7240] sock_recvmsg+0x92/0xb0 [ 51.286493][ T7240] sock_read_iter+0x15f/0x1e0 [ 51.291157][ T7240] new_sync_read+0x389/0x4f0 [ 51.295721][ T7240] __vfs_read+0xb1/0xc0 [ 51.299849][ T7240] vfs_read+0x143/0x2c0 [ 51.303991][ T7240] ksys_read+0xd5/0x1b0 [ 51.308112][ T7240] [ 51.310421][ T7240] Reported by Kernel Concurrency Sanitizer on: [ 51.316557][ T7240] CPU: 0 PID: 7240 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 51.323633][ T7240] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.333659][ T7240] ================================================================== [ 51.341698][ T7240] Kernel panic - not syncing: panic_on_warn set ... [ 51.348268][ T7240] CPU: 0 PID: 7240 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 51.355351][ T7240] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.365376][ T7240] Call Trace: [ 51.368641][ T7240] dump_stack+0xf5/0x159 [ 51.372874][ T7240] panic+0x209/0x639 [ 51.376745][ T7240] ? sock_read_iter+0x15f/0x1e0 [ 51.381568][ T7240] ? vprintk_func+0x8d/0x140 [ 51.386135][ T7240] kcsan_report.cold+0xc/0x1b [ 51.390789][ T7240] __kcsan_setup_watchpoint+0x3ee/0x510 [ 51.396331][ T7240] __tsan_read8+0x2c/0x30 [ 51.400641][ T7240] ktime_get_seconds+0x49/0x60 [ 51.405410][ T7240] tcp_rcv_established+0xeeb/0xf50 [ 51.410503][ T7240] ? ipv4_dst_check+0xc6/0xf0 [ 51.415156][ T7240] tcp_v4_do_rcv+0x381/0x4e0 [ 51.419744][ T7240] __release_sock+0x135/0x1e0 [ 51.424404][ T7240] release_sock+0x61/0x160 [ 51.428810][ T7240] tcp_recvmsg+0x63b/0x1a30 [ 51.433298][ T7240] inet_recvmsg+0xbb/0x250 [ 51.437714][ T7240] ? __tsan_read8+0x2c/0x30 [ 51.442271][ T7240] ? inet_sendpage+0x100/0x100 [ 51.447013][ T7240] sock_recvmsg+0x92/0xb0 [ 51.451318][ T7240] sock_read_iter+0x15f/0x1e0 [ 51.455980][ T7240] new_sync_read+0x389/0x4f0 [ 51.460568][ T7240] __vfs_read+0xb1/0xc0 [ 51.464708][ T7240] vfs_read+0x143/0x2c0 [ 51.468843][ T7240] ksys_read+0xd5/0x1b0 [ 51.472978][ T7240] __x64_sys_read+0x4c/0x60 [ 51.477463][ T7240] do_syscall_64+0xcf/0x2f0 [ 51.481952][ T7240] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.487820][ T7240] RIP: 0033:0x47c530 [ 51.491736][ T7240] 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 [ 51.511319][ T7240] RSP: 002b:000000c4203ad810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 51.520179][ T7240] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 51.528126][ T7240] RDX: 0000000000001000 RSI: 000000c4203c2000 RDI: 0000000000000003 [ 51.536074][ T7240] RBP: 000000c4203ad868 R08: 0000000000000000 R09: 0000000000000000 [ 51.544020][ T7240] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000040 [ 51.552007][ T7240] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 51.561322][ T7240] Kernel Offset: disabled [ 51.565639][ T7240] Rebooting in 86400 seconds..