[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 36.294031][ T26] audit: type=1800 audit(1570326287.093:25): pid=7194 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 36.313798][ T26] audit: type=1800 audit(1570326287.093:26): pid=7194 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 36.335720][ T26] audit: type=1800 audit(1570326287.093:27): pid=7194 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 '10.128.0.45' (ECDSA) to the list of known hosts. 2019/10/06 01:44:57 fuzzer started 2019/10/06 01:44:59 dialing manager at 10.128.0.105:35709 2019/10/06 01:44:59 syscalls: 2523 2019/10/06 01:44:59 code coverage: enabled 2019/10/06 01:44:59 comparison tracing: enabled 2019/10/06 01:44:59 extra coverage: extra coverage is not supported by the kernel 2019/10/06 01:44:59 setuid sandbox: enabled 2019/10/06 01:44:59 namespace sandbox: enabled 2019/10/06 01:44:59 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/06 01:44:59 fault injection: enabled 2019/10/06 01:44:59 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/06 01:44:59 net packet injection: enabled 2019/10/06 01:44:59 net device setup: enabled 2019/10/06 01:44:59 concurrency sanitizer: enabled syzkaller login: [ 49.339103][ T7346] ================================================================== [ 49.347347][ T7346] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 49.355239][ T7346] [ 49.357674][ T7346] write to 0xffffffff8603db08 of 280 bytes by interrupt on cpu 0: [ 49.365455][ T7346] timekeeping_advance+0x893/0xd80 [ 49.370570][ T7346] update_wall_time+0x19/0x20 [ 49.375303][ T7346] tick_do_update_jiffies64+0x1ae/0x260 [ 49.380882][ T7346] tick_sched_do_timer+0xd4/0xe0 [ 49.385854][ T7346] tick_sched_timer+0x43/0xe0 [ 49.390515][ T7346] __hrtimer_run_queues+0x288/0x600 [ 49.395709][ T7346] hrtimer_interrupt+0x22a/0x480 [ 49.400625][ T7346] smp_apic_timer_interrupt+0xdc/0x280 [ 49.406062][ T7346] apic_timer_interrupt+0xf/0x20 [ 49.410977][ T7346] __kcsan_check_watchpoint+0x8f/0x180 [ 49.416427][ T7346] __tsan_read8+0x15/0x30 [ 49.420737][ T7346] dev_gro_receive+0x841/0x1190 [ 49.425562][ T7346] napi_gro_receive+0x7c/0x330 [ 49.430309][ T7346] receive_buf+0x284/0x30b0 [ 49.434782][ T7346] [ 49.437099][ T7346] read to 0xffffffff8603db80 of 8 bytes by task 7346 on cpu 1: [ 49.444619][ T7346] ktime_get_seconds+0x49/0x60 [ 49.449375][ T7346] tcp_rcv_established+0xeeb/0xf50 [ 49.454486][ T7346] tcp_v4_do_rcv+0x381/0x4e0 [ 49.459067][ T7346] __release_sock+0x135/0x1e0 [ 49.463722][ T7346] release_sock+0x61/0x160 [ 49.468114][ T7346] tcp_recvmsg+0x63b/0x1a30 [ 49.472596][ T7346] inet_recvmsg+0xbb/0x250 [ 49.476988][ T7346] sock_recvmsg+0x92/0xb0 [ 49.481304][ T7346] sock_read_iter+0x15f/0x1e0 [ 49.485959][ T7346] new_sync_read+0x389/0x4f0 [ 49.490571][ T7346] __vfs_read+0xb1/0xc0 [ 49.494713][ T7346] vfs_read+0x143/0x2c0 [ 49.498851][ T7346] ksys_read+0xd5/0x1b0 [ 49.502980][ T7346] [ 49.505289][ T7346] Reported by Kernel Concurrency Sanitizer on: [ 49.511438][ T7346] CPU: 1 PID: 7346 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 49.518527][ T7346] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.528566][ T7346] ================================================================== [ 49.536605][ T7346] Kernel panic - not syncing: panic_on_warn set ... [ 49.543187][ T7346] CPU: 1 PID: 7346 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 49.550279][ T7346] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.560370][ T7346] Call Trace: [ 49.563725][ T7346] dump_stack+0xf5/0x159 [ 49.567968][ T7346] panic+0x209/0x639 [ 49.571931][ T7346] ? vprintk_func+0x8d/0x140 [ 49.576506][ T7346] kcsan_report.cold+0x57/0xeb [ 49.581251][ T7346] __kcsan_setup_watchpoint+0x342/0x500 [ 49.586777][ T7346] __tsan_read8+0x2c/0x30 [ 49.591088][ T7346] ktime_get_seconds+0x49/0x60 [ 49.595833][ T7346] tcp_rcv_established+0xeeb/0xf50 [ 49.600932][ T7346] ? ipv4_dst_check+0xc6/0xf0 [ 49.605594][ T7346] tcp_v4_do_rcv+0x381/0x4e0 [ 49.610170][ T7346] __release_sock+0x135/0x1e0 [ 49.614831][ T7346] release_sock+0x61/0x160 [ 49.619231][ T7346] tcp_recvmsg+0x63b/0x1a30 [ 49.623717][ T7346] ? __const_udelay+0x36/0x40 [ 49.628381][ T7346] inet_recvmsg+0xbb/0x250 [ 49.632783][ T7346] ? __tsan_read8+0x2c/0x30 [ 49.637269][ T7346] ? inet_sendpage+0x100/0x100 [ 49.642014][ T7346] sock_recvmsg+0x92/0xb0 [ 49.646428][ T7346] sock_read_iter+0x15f/0x1e0 [ 49.651150][ T7346] new_sync_read+0x389/0x4f0 [ 49.655730][ T7346] __vfs_read+0xb1/0xc0 [ 49.659865][ T7346] vfs_read+0x143/0x2c0 [ 49.664001][ T7346] ksys_read+0xd5/0x1b0 [ 49.668138][ T7346] __x64_sys_read+0x4c/0x60 [ 49.672625][ T7346] do_syscall_64+0xcf/0x2f0 [ 49.677114][ T7346] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 49.683001][ T7346] RIP: 0033:0x47c530 [ 49.686888][ T7346] 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 [ 49.706478][ T7346] RSP: 002b:000000c4201b7810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 49.714882][ T7346] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 49.722846][ T7346] RDX: 0000000000001000 RSI: 000000c420158000 RDI: 0000000000000003 [ 49.730796][ T7346] RBP: 000000c4201b7868 R08: 0000000000000000 R09: 0000000000000000 [ 49.738746][ T7346] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000020 [ 49.746695][ T7346] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 49.756420][ T7346] Kernel Offset: disabled [ 49.760802][ T7346] Rebooting in 86400 seconds..