[ 34.750893][ T25] audit: type=1800 audit(1571319126.137:25): pid=7103 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 34.789947][ T25] audit: type=1800 audit(1571319126.137:26): pid=7103 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 34.815162][ T25] audit: type=1800 audit(1571319126.137:27): pid=7103 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. [ 35.450338][ T7168] sshd (7168) used greatest stack depth: 10136 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.225' (ECDSA) to the list of known hosts. 2019/10/17 13:32:14 fuzzer started 2019/10/17 13:32:15 dialing manager at 10.128.0.105:33899 2019/10/17 13:32:15 syscalls: 2524 2019/10/17 13:32:15 code coverage: enabled 2019/10/17 13:32:15 comparison tracing: enabled 2019/10/17 13:32:15 extra coverage: extra coverage is not supported by the kernel 2019/10/17 13:32:15 setuid sandbox: enabled 2019/10/17 13:32:15 namespace sandbox: enabled 2019/10/17 13:32:15 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/17 13:32:15 fault injection: enabled 2019/10/17 13:32:15 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/17 13:32:15 net packet injection: enabled 2019/10/17 13:32:15 net device setup: enabled 2019/10/17 13:32:15 concurrency sanitizer: enabled syzkaller login: [ 45.335573][ T7268] ================================================================== [ 45.343707][ T7268] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 45.351584][ T7268] [ 45.353939][ T7268] write to 0xffffffff86040b08 of 280 bytes by interrupt on cpu 1: [ 45.361821][ T7268] timekeeping_advance+0x893/0xd80 [ 45.366932][ T7268] update_wall_time+0x19/0x20 [ 45.371595][ T7268] tick_do_update_jiffies64+0x1ae/0x260 [ 45.377121][ T7268] tick_sched_do_timer+0xd4/0xe0 [ 45.382047][ T7268] tick_sched_timer+0x43/0xe0 [ 45.386714][ T7268] __hrtimer_run_queues+0x288/0x600 [ 45.391885][ T7268] hrtimer_interrupt+0x22a/0x480 [ 45.396806][ T7268] smp_apic_timer_interrupt+0xdc/0x280 [ 45.402250][ T7268] apic_timer_interrupt+0xf/0x20 [ 45.407163][ T7268] virtqueue_get_buf_ctx+0x443/0x5c0 [ 45.412426][ T7268] receive_buf+0x183e/0x30b0 [ 45.416991][ T7268] virtnet_poll+0x436/0x7d0 [ 45.421472][ T7268] net_rx_action+0x3ae/0xa90 [ 45.426050][ T7268] __do_softirq+0x115/0x33f [ 45.430519][ T7268] [ 45.432826][ T7268] read to 0xffffffff86040b80 of 8 bytes by task 7268 on cpu 0: [ 45.440342][ T7268] ktime_get_seconds+0x45/0x70 [ 45.445078][ T7268] tcp_rcv_established+0xeeb/0xf50 [ 45.450179][ T7268] tcp_v4_do_rcv+0x381/0x4e0 [ 45.454770][ T7268] __release_sock+0x135/0x1e0 [ 45.459422][ T7268] release_sock+0x61/0x160 [ 45.463814][ T7268] tcp_recvmsg+0x63b/0x1a30 [ 45.468725][ T7268] inet_recvmsg+0xbb/0x250 [ 45.473119][ T7268] sock_recvmsg+0x92/0xb0 [ 45.477426][ T7268] sock_read_iter+0x15f/0x1e0 [ 45.482090][ T7268] new_sync_read+0x389/0x4f0 [ 45.486666][ T7268] __vfs_read+0xb1/0xc0 [ 45.490796][ T7268] vfs_read+0x143/0x2c0 [ 45.494926][ T7268] ksys_read+0xd5/0x1b0 [ 45.499054][ T7268] [ 45.501354][ T7268] Reported by Kernel Concurrency Sanitizer on: [ 45.507496][ T7268] CPU: 0 PID: 7268 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 45.514923][ T7268] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.524951][ T7268] ================================================================== [ 45.533017][ T7268] Kernel panic - not syncing: panic_on_warn set ... [ 45.539577][ T7268] CPU: 0 PID: 7268 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 45.547022][ T7268] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.557048][ T7268] Call Trace: [ 45.560315][ T7268] dump_stack+0xf5/0x159 [ 45.564534][ T7268] panic+0x210/0x640 [ 45.568416][ T7268] ? sock_read_iter+0x15f/0x1e0 [ 45.573251][ T7268] ? vprintk_func+0x8d/0x140 [ 45.577817][ T7268] kcsan_report.cold+0xc/0x1b [ 45.582482][ T7268] __kcsan_setup_watchpoint+0x3ee/0x510 [ 45.588023][ T7268] __tsan_read8+0x2c/0x30 [ 45.592330][ T7268] ktime_get_seconds+0x45/0x70 [ 45.597082][ T7268] tcp_rcv_established+0xeeb/0xf50 [ 45.602170][ T7268] ? ipv4_dst_check+0xc6/0xf0 [ 45.606836][ T7268] tcp_v4_do_rcv+0x381/0x4e0 [ 45.611413][ T7268] __release_sock+0x135/0x1e0 [ 45.616069][ T7268] release_sock+0x61/0x160 [ 45.620463][ T7268] tcp_recvmsg+0x63b/0x1a30 [ 45.624952][ T7268] inet_recvmsg+0xbb/0x250 [ 45.629358][ T7268] ? __tsan_read8+0x2c/0x30 [ 45.633849][ T7268] ? inet_sendpage+0x100/0x100 [ 45.638598][ T7268] sock_recvmsg+0x92/0xb0 [ 45.642914][ T7268] sock_read_iter+0x15f/0x1e0 [ 45.647584][ T7268] new_sync_read+0x389/0x4f0 [ 45.652154][ T7268] __vfs_read+0xb1/0xc0 [ 45.656372][ T7268] vfs_read+0x143/0x2c0 [ 45.660505][ T7268] ksys_read+0xd5/0x1b0 [ 45.664640][ T7268] __x64_sys_read+0x4c/0x60 [ 45.669132][ T7268] do_syscall_64+0xcc/0x370 [ 45.673614][ T7268] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 45.679478][ T7268] RIP: 0033:0x47c530 [ 45.683364][ T7268] 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 [ 45.702944][ T7268] RSP: 002b:000000c4202c77d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 45.711351][ T7268] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 45.719300][ T7268] RDX: 0000000000001000 RSI: 000000c4200ae000 RDI: 0000000000000003 [ 45.727256][ T7268] RBP: 000000c4202c7830 R08: 0000000000000000 R09: 0000000000000000 [ 45.735201][ T7268] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000010 [ 45.743156][ T7268] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 45.752651][ T7268] Kernel Offset: disabled [ 45.756982][ T7268] Rebooting in 86400 seconds..