[ 34.819664][ T26] audit: type=1800 audit(1571493283.921:25): pid=7012 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 34.872145][ T26] audit: type=1800 audit(1571493283.921:26): pid=7012 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 34.898241][ T26] audit: type=1800 audit(1571493283.921:27): pid=7012 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. [ 35.295172][ T7077] sshd (7077) 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 '10.128.0.9' (ECDSA) to the list of known hosts. 2019/10/19 13:54:55 fuzzer started 2019/10/19 13:54:57 dialing manager at 10.128.0.105:43535 2019/10/19 13:54:57 syscalls: 2524 2019/10/19 13:54:57 code coverage: enabled 2019/10/19 13:54:57 comparison tracing: enabled 2019/10/19 13:54:57 extra coverage: extra coverage is not supported by the kernel 2019/10/19 13:54:57 setuid sandbox: enabled 2019/10/19 13:54:57 namespace sandbox: enabled 2019/10/19 13:54:57 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/19 13:54:57 fault injection: enabled 2019/10/19 13:54:57 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/19 13:54:57 net packet injection: enabled 2019/10/19 13:54:57 net device setup: enabled 2019/10/19 13:54:57 concurrency sanitizer: enabled syzkaller login: [ 49.517624][ T7160] ================================================================== [ 49.525851][ T7160] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 49.533854][ T7160] [ 49.536173][ T7160] write to 0xffffffff86040b08 of 280 bytes by interrupt on cpu 1: [ 49.543979][ T7160] timekeeping_advance+0x893/0xd80 [ 49.549069][ T7160] update_wall_time+0x19/0x20 [ 49.553727][ T7160] tick_do_update_jiffies64+0x1ae/0x260 [ 49.559267][ T7160] tick_sched_do_timer+0xd4/0xe0 [ 49.564215][ T7160] tick_sched_timer+0x43/0xe0 [ 49.568875][ T7160] __hrtimer_run_queues+0x288/0x600 [ 49.574064][ T7160] hrtimer_interrupt+0x22a/0x480 [ 49.579018][ T7160] smp_apic_timer_interrupt+0xdc/0x280 [ 49.584467][ T7160] apic_timer_interrupt+0xf/0x20 [ 49.589403][ T7160] nf_hook_slow+0x25/0x160 [ 49.593796][ T7160] ip_rcv+0x12f/0x1a0 [ 49.597775][ T7160] __netif_receive_skb_one_core+0xa7/0xe0 [ 49.603493][ T7160] __netif_receive_skb+0x37/0xf0 [ 49.608473][ T7160] netif_receive_skb_internal+0x59/0x190 [ 49.614090][ T7160] [ 49.616411][ T7160] read to 0xffffffff86040b80 of 8 bytes by task 7160 on cpu 0: [ 49.623957][ T7160] ktime_get_seconds+0x45/0x70 [ 49.628706][ T7160] tcp_rcv_established+0xeeb/0xf50 [ 49.633813][ T7160] tcp_v4_do_rcv+0x381/0x4e0 [ 49.638400][ T7160] __release_sock+0x135/0x1e0 [ 49.643353][ T7160] release_sock+0x61/0x160 [ 49.647760][ T7160] tcp_recvmsg+0x63b/0x1a30 [ 49.652356][ T7160] inet_recvmsg+0xbb/0x250 [ 49.656766][ T7160] sock_recvmsg+0x92/0xb0 [ 49.661075][ T7160] sock_read_iter+0x15f/0x1e0 [ 49.665730][ T7160] new_sync_read+0x389/0x4f0 [ 49.670295][ T7160] __vfs_read+0xb1/0xc0 [ 49.674452][ T7160] vfs_read+0x143/0x2c0 [ 49.678582][ T7160] ksys_read+0xd5/0x1b0 [ 49.682991][ T7160] [ 49.685307][ T7160] Reported by Kernel Concurrency Sanitizer on: [ 49.691537][ T7160] CPU: 0 PID: 7160 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 49.698964][ T7160] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.709025][ T7160] ================================================================== [ 49.717058][ T7160] Kernel panic - not syncing: panic_on_warn set ... [ 49.723634][ T7160] CPU: 0 PID: 7160 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 49.731235][ T7160] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.741271][ T7160] Call Trace: [ 49.744555][ T7160] dump_stack+0xf5/0x159 [ 49.748932][ T7160] panic+0x210/0x640 [ 49.752855][ T7160] ? sock_read_iter+0x15f/0x1e0 [ 49.757691][ T7160] ? vprintk_func+0x8d/0x140 [ 49.762356][ T7160] kcsan_report.cold+0xc/0x10 [ 49.767025][ T7160] __kcsan_setup_watchpoint+0x32e/0x4a0 [ 49.772549][ T7160] __tsan_read8+0x2c/0x30 [ 49.776869][ T7160] ktime_get_seconds+0x45/0x70 [ 49.781618][ T7160] tcp_rcv_established+0xeeb/0xf50 [ 49.786760][ T7160] ? ipv4_dst_check+0xc6/0xf0 [ 49.791430][ T7160] tcp_v4_do_rcv+0x381/0x4e0 [ 49.796017][ T7160] __release_sock+0x135/0x1e0 [ 49.800692][ T7160] release_sock+0x61/0x160 [ 49.805105][ T7160] tcp_recvmsg+0x63b/0x1a30 [ 49.809593][ T7160] ? preempt_schedule_irq+0x72/0x90 [ 49.814769][ T7160] inet_recvmsg+0xbb/0x250 [ 49.819209][ T7160] ? __tsan_read8+0x2c/0x30 [ 49.823777][ T7160] ? inet_sendpage+0x100/0x100 [ 49.828536][ T7160] sock_recvmsg+0x92/0xb0 [ 49.832892][ T7160] sock_read_iter+0x15f/0x1e0 [ 49.837565][ T7160] new_sync_read+0x389/0x4f0 [ 49.842145][ T7160] __vfs_read+0xb1/0xc0 [ 49.846292][ T7160] vfs_read+0x143/0x2c0 [ 49.850533][ T7160] ksys_read+0xd5/0x1b0 [ 49.854744][ T7160] __x64_sys_read+0x4c/0x60 [ 49.859248][ T7160] do_syscall_64+0xcc/0x370 [ 49.863749][ T7160] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 49.869813][ T7160] RIP: 0033:0x47c530 [ 49.873694][ T7160] 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 [ 49.894335][ T7160] RSP: 002b:000000c4203717d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 49.902736][ T7160] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 49.910699][ T7160] RDX: 0000000000001000 RSI: 000000c42030a000 RDI: 0000000000000003 [ 49.918701][ T7160] RBP: 000000c420371830 R08: 0000000000000000 R09: 0000000000000000 [ 49.926673][ T7160] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000004 [ 49.934641][ T7160] R13: ffffffffffffffff R14: 0000000000000004 R15: ffffffffffffffff [ 49.944217][ T7160] Kernel Offset: disabled [ 49.948563][ T7160] Rebooting in 86400 seconds..