[ 41.223122][ T23] audit: type=1800 audit(1570565052.147:23): pid=7218 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2475 res=0 [ 41.248533][ T23] audit: type=1800 audit(1570565052.147:24): pid=7218 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2487 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 41.647563][ T23] audit: type=1800 audit(1570565052.637:25): pid=7218 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 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 '10.128.0.190' (ECDSA) to the list of known hosts. 2019/10/08 20:04:23 fuzzer started 2019/10/08 20:04:25 dialing manager at 10.128.0.105:35069 2019/10/08 20:04:25 syscalls: 2523 2019/10/08 20:04:25 code coverage: enabled 2019/10/08 20:04:25 comparison tracing: enabled 2019/10/08 20:04:25 extra coverage: extra coverage is not supported by the kernel 2019/10/08 20:04:25 setuid sandbox: enabled 2019/10/08 20:04:25 namespace sandbox: enabled 2019/10/08 20:04:25 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/08 20:04:25 fault injection: enabled 2019/10/08 20:04:25 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/08 20:04:25 net packet injection: enabled 2019/10/08 20:04:25 net device setup: enabled 2019/10/08 20:04:25 concurrency sanitizer: enabled syzkaller login: [ 54.777407][ T7374] ================================================================== [ 54.785564][ T7374] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 54.793799][ T7374] [ 54.796136][ T7374] write to 0xffffffff8603db08 of 280 bytes by interrupt on cpu 1: [ 54.803952][ T7374] timekeeping_advance+0x893/0xd80 [ 54.809058][ T7374] update_wall_time+0x19/0x20 [ 54.813987][ T7374] tick_do_update_jiffies64+0x1ae/0x260 [ 54.819538][ T7374] tick_sched_do_timer+0xd4/0xe0 [ 54.824458][ T7374] tick_sched_timer+0x43/0xe0 [ 54.829225][ T7374] __hrtimer_run_queues+0x288/0x600 [ 54.835287][ T7374] hrtimer_interrupt+0x22a/0x480 [ 54.840767][ T7374] smp_apic_timer_interrupt+0xdc/0x280 [ 54.846236][ T7374] apic_timer_interrupt+0xf/0x20 [ 54.851260][ T7374] __kcsan_check_watchpoint+0x95/0x180 [ 54.857656][ T7374] __tsan_read8+0x15/0x30 [ 54.861966][ T7374] eth_type_trans+0x169/0x3d0 [ 54.866771][ T7374] receive_buf+0x265/0x30b0 [ 54.871255][ T7374] virtnet_poll+0x436/0x7d0 [ 54.876614][ T7374] [ 54.878929][ T7374] read to 0xffffffff8603db80 of 8 bytes by task 7374 on cpu 0: [ 54.886461][ T7374] ktime_get_seconds+0x49/0x60 [ 54.891208][ T7374] tcp_rcv_established+0xeeb/0xf50 [ 54.896301][ T7374] tcp_v4_do_rcv+0x381/0x4e0 [ 54.901047][ T7374] __release_sock+0x135/0x1e0 [ 54.906295][ T7374] release_sock+0x61/0x160 [ 54.910914][ T7374] tcp_recvmsg+0x63b/0x1a30 [ 54.915617][ T7374] inet_recvmsg+0xbb/0x250 [ 54.920190][ T7374] sock_recvmsg+0x92/0xb0 [ 54.924504][ T7374] sock_read_iter+0x15f/0x1e0 [ 54.929163][ T7374] new_sync_read+0x389/0x4f0 [ 54.933732][ T7374] __vfs_read+0xb1/0xc0 [ 54.937863][ T7374] vfs_read+0x143/0x2c0 [ 54.941997][ T7374] ksys_read+0xd5/0x1b0 [ 54.946131][ T7374] [ 54.948456][ T7374] Reported by Kernel Concurrency Sanitizer on: [ 54.954585][ T7374] CPU: 0 PID: 7374 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 54.961665][ T7374] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.971700][ T7374] ================================================================== [ 54.979756][ T7374] Kernel panic - not syncing: panic_on_warn set ... [ 54.986323][ T7374] CPU: 0 PID: 7374 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 54.993639][ T7374] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.003770][ T7374] Call Trace: [ 55.007061][ T7374] dump_stack+0xf5/0x159 [ 55.011296][ T7374] panic+0x209/0x639 [ 55.015189][ T7374] ? sock_read_iter+0x15f/0x1e0 [ 55.020030][ T7374] ? vprintk_func+0x8d/0x140 [ 55.024612][ T7374] kcsan_report.cold+0xc/0x1b [ 55.029274][ T7374] __kcsan_setup_watchpoint+0x3ee/0x510 [ 55.034808][ T7374] __tsan_read8+0x2c/0x30 [ 55.039248][ T7374] ktime_get_seconds+0x49/0x60 [ 55.044000][ T7374] tcp_rcv_established+0xeeb/0xf50 [ 55.049107][ T7374] ? ipv4_dst_check+0xc6/0xf0 [ 55.053770][ T7374] tcp_v4_do_rcv+0x381/0x4e0 [ 55.058352][ T7374] __release_sock+0x135/0x1e0 [ 55.065524][ T7374] release_sock+0x61/0x160 [ 55.069926][ T7374] tcp_recvmsg+0x63b/0x1a30 [ 55.074425][ T7374] inet_recvmsg+0xbb/0x250 [ 55.078824][ T7374] ? __tsan_read8+0x2c/0x30 [ 55.083320][ T7374] ? inet_sendpage+0x100/0x100 [ 55.088062][ T7374] sock_recvmsg+0x92/0xb0 [ 55.092370][ T7374] sock_read_iter+0x15f/0x1e0 [ 55.097046][ T7374] new_sync_read+0x389/0x4f0 [ 55.101658][ T7374] __vfs_read+0xb1/0xc0 [ 55.105802][ T7374] vfs_read+0x143/0x2c0 [ 55.109957][ T7374] ksys_read+0xd5/0x1b0 [ 55.114194][ T7374] __x64_sys_read+0x4c/0x60 [ 55.118853][ T7374] do_syscall_64+0xcf/0x2f0 [ 55.123567][ T7374] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.129450][ T7374] RIP: 0033:0x47c530 [ 55.133338][ T7374] 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 [ 55.152942][ T7374] RSP: 002b:000000c4202d97d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 55.161332][ T7374] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 55.169612][ T7374] RDX: 0000000000001000 RSI: 000000c42016e000 RDI: 0000000000000003 [ 55.177662][ T7374] RBP: 000000c4202d9830 R08: 0000000000000000 R09: 0000000000000000 [ 55.187202][ T7374] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000007 [ 55.195153][ T7374] R13: 000000c420020470 R14: 0000000000000004 R15: ffffffffffffffff [ 55.204491][ T7374] Kernel Offset: disabled [ 55.208835][ T7374] Rebooting in 86400 seconds..