[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.564979][ T26] audit: type=1800 audit(1570832729.919:25): pid=7062 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 35.595306][ T26] audit: type=1800 audit(1570832729.929:26): pid=7062 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 35.634875][ T26] audit: type=1800 audit(1570832729.929:27): pid=7062 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 '10.128.1.23' (ECDSA) to the list of known hosts. 2019/10/11 22:25:36 fuzzer started 2019/10/11 22:25:38 dialing manager at 10.128.0.105:43913 2019/10/11 22:25:38 syscalls: 2523 2019/10/11 22:25:38 code coverage: enabled 2019/10/11 22:25:38 comparison tracing: enabled 2019/10/11 22:25:38 extra coverage: extra coverage is not supported by the kernel 2019/10/11 22:25:38 setuid sandbox: enabled 2019/10/11 22:25:38 namespace sandbox: enabled 2019/10/11 22:25:38 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/11 22:25:38 fault injection: enabled 2019/10/11 22:25:38 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/11 22:25:38 net packet injection: enabled 2019/10/11 22:25:38 net device setup: enabled 2019/10/11 22:25:38 concurrency sanitizer: enabled syzkaller login: [ 44.125536][ T7225] ================================================================== [ 44.134001][ T7225] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 44.142192][ T7225] [ 44.144675][ T7225] write to 0xffffffff8603db08 of 280 bytes by interrupt on cpu 0: [ 44.152689][ T7225] timekeeping_advance+0x893/0xd80 [ 44.158099][ T7225] update_wall_time+0x19/0x20 [ 44.162769][ T7225] tick_do_update_jiffies64+0x1ae/0x260 [ 44.168305][ T7225] tick_sched_do_timer+0xd4/0xe0 [ 44.173219][ T7225] tick_sched_timer+0x43/0xe0 [ 44.177872][ T7225] __hrtimer_run_queues+0x288/0x600 [ 44.183056][ T7225] hrtimer_interrupt+0x22a/0x480 [ 44.187985][ T7225] smp_apic_timer_interrupt+0xdc/0x280 [ 44.193432][ T7225] apic_timer_interrupt+0xf/0x20 [ 44.198439][ T7225] __kcsan_setup_watchpoint+0xa8/0x510 [ 44.203886][ T7225] __tsan_write8+0x32/0x40 [ 44.208288][ T7225] ip_local_deliver+0x1cc/0x210 [ 44.213116][ T7225] ip_rcv_finish+0x121/0x160 [ 44.217785][ T7225] ip_rcv+0x18f/0x1a0 [ 44.221748][ T7225] [ 44.224066][ T7225] read to 0xffffffff8603db80 of 8 bytes by task 7225 on cpu 1: [ 44.231993][ T7225] ktime_get_seconds+0x49/0x60 [ 44.237021][ T7225] tcp_rcv_established+0xeeb/0xf50 [ 44.242112][ T7225] tcp_v4_do_rcv+0x381/0x4e0 [ 44.246777][ T7225] __release_sock+0x135/0x1e0 [ 44.251460][ T7225] release_sock+0x61/0x160 [ 44.255863][ T7225] tcp_recvmsg+0x63b/0x1a30 [ 44.260384][ T7225] inet_recvmsg+0xbb/0x250 [ 44.264792][ T7225] sock_recvmsg+0x92/0xb0 [ 44.269369][ T7225] sock_read_iter+0x15f/0x1e0 [ 44.274213][ T7225] new_sync_read+0x389/0x4f0 [ 44.278784][ T7225] __vfs_read+0xb1/0xc0 [ 44.282920][ T7225] vfs_read+0x143/0x2c0 [ 44.287140][ T7225] ksys_read+0xd5/0x1b0 [ 44.291266][ T7225] [ 44.293609][ T7225] Reported by Kernel Concurrency Sanitizer on: [ 44.299834][ T7225] CPU: 1 PID: 7225 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 44.307008][ T7225] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.317039][ T7225] ================================================================== [ 44.325080][ T7225] Kernel panic - not syncing: panic_on_warn set ... [ 44.331667][ T7225] CPU: 1 PID: 7225 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 44.338837][ T7225] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.348870][ T7225] Call Trace: [ 44.352148][ T7225] dump_stack+0xf5/0x159 [ 44.356380][ T7225] panic+0x209/0x639 [ 44.360260][ T7225] ? sock_read_iter+0x15f/0x1e0 [ 44.365109][ T7225] ? vprintk_func+0x8d/0x140 [ 44.369953][ T7225] kcsan_report.cold+0xc/0x1b [ 44.374698][ T7225] __kcsan_setup_watchpoint+0x3ee/0x510 [ 44.380257][ T7225] __tsan_read8+0x2c/0x30 [ 44.384583][ T7225] ktime_get_seconds+0x49/0x60 [ 44.389343][ T7225] tcp_rcv_established+0xeeb/0xf50 [ 44.394461][ T7225] ? ipv4_dst_check+0xc6/0xf0 [ 44.399124][ T7225] tcp_v4_do_rcv+0x381/0x4e0 [ 44.403724][ T7225] __release_sock+0x135/0x1e0 [ 44.408723][ T7225] release_sock+0x61/0x160 [ 44.413134][ T7225] tcp_recvmsg+0x63b/0x1a30 [ 44.417718][ T7225] ? delay_tsc+0x8f/0xc0 [ 44.424989][ T7225] inet_recvmsg+0xbb/0x250 [ 44.429465][ T7225] ? __tsan_read8+0x2c/0x30 [ 44.433969][ T7225] ? inet_sendpage+0x100/0x100 [ 44.438720][ T7225] sock_recvmsg+0x92/0xb0 [ 44.443030][ T7225] sock_read_iter+0x15f/0x1e0 [ 44.447706][ T7225] new_sync_read+0x389/0x4f0 [ 44.452291][ T7225] __vfs_read+0xb1/0xc0 [ 44.456434][ T7225] vfs_read+0x143/0x2c0 [ 44.460611][ T7225] ksys_read+0xd5/0x1b0 [ 44.464748][ T7225] __x64_sys_read+0x4c/0x60 [ 44.469252][ T7225] do_syscall_64+0xcf/0x2f0 [ 44.473879][ T7225] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 44.479748][ T7225] RIP: 0033:0x47c530 [ 44.483631][ T7225] 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 [ 44.503319][ T7225] RSP: 002b:000000c420307810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 44.511719][ T7225] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 44.519671][ T7225] RDX: 0000000000001000 RSI: 000000c420372000 RDI: 0000000000000003 [ 44.529721][ T7225] RBP: 000000c420307868 R08: 0000000000000000 R09: 0000000000000000 [ 44.537766][ T7225] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004 [ 44.545729][ T7225] R13: 000000c420083070 R14: 0000000000000002 R15: ffffffffffffffff [ 44.555809][ T7225] Kernel Offset: disabled [ 44.560237][ T7225] Rebooting in 86400 seconds..