[ 33.151364][ T26] audit: type=1800 audit(1570600888.609:25): pid=7075 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 33.178473][ T26] audit: type=1800 audit(1570600888.609:26): pid=7075 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 33.213771][ T26] audit: type=1800 audit(1570600888.619:27): pid=7075 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. [ 33.429309][ T7140] sshd (7140) used greatest stack depth: 10032 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. 2019/10/09 06:01:49 fuzzer started 2019/10/09 06:01:50 dialing manager at 10.128.0.105:35069 2019/10/09 06:01:50 syscalls: 2523 2019/10/09 06:01:50 code coverage: enabled 2019/10/09 06:01:50 comparison tracing: enabled 2019/10/09 06:01:50 extra coverage: extra coverage is not supported by the kernel 2019/10/09 06:01:50 setuid sandbox: enabled 2019/10/09 06:01:50 namespace sandbox: enabled 2019/10/09 06:01:50 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/09 06:01:50 fault injection: enabled 2019/10/09 06:01:50 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/09 06:01:50 net packet injection: enabled 2019/10/09 06:01:50 net device setup: enabled 2019/10/09 06:01:50 concurrency sanitizer: enabled syzkaller login: [ 55.613502][ T7233] ================================================================== [ 55.621733][ T7233] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 55.629629][ T7233] [ 55.631948][ T7233] write to 0xffffffff8603db08 of 280 bytes by interrupt on cpu 1: [ 55.639731][ T7233] timekeeping_advance+0x893/0xd80 [ 55.644819][ T7233] update_wall_time+0x19/0x20 [ 55.649473][ T7233] tick_do_update_jiffies64+0x1ae/0x260 [ 55.654996][ T7233] tick_sched_do_timer+0xd4/0xe0 [ 55.659908][ T7233] tick_sched_timer+0x43/0xe0 [ 55.664562][ T7233] __hrtimer_run_queues+0x288/0x600 [ 55.669745][ T7233] hrtimer_interrupt+0x22a/0x480 [ 55.674658][ T7233] smp_apic_timer_interrupt+0xdc/0x280 [ 55.680092][ T7233] apic_timer_interrupt+0xf/0x20 [ 55.685017][ T7233] __kcsan_check_watchpoint+0x9c/0x180 [ 55.690451][ T7233] __tsan_write4+0x18/0x40 [ 55.694846][ T7233] eth_type_trans+0xc3/0x3d0 [ 55.699420][ T7233] receive_buf+0x265/0x30b0 [ 55.703899][ T7233] virtnet_poll+0x436/0x7d0 [ 55.708369][ T7233] [ 55.710698][ T7233] read to 0xffffffff8603db80 of 8 bytes by task 7233 on cpu 0: [ 55.718230][ T7233] ktime_get_seconds+0x49/0x60 [ 55.723020][ T7233] tcp_rcv_established+0xeeb/0xf50 [ 55.728111][ T7233] tcp_v4_do_rcv+0x381/0x4e0 [ 55.732685][ T7233] __release_sock+0x135/0x1e0 [ 55.737381][ T7233] release_sock+0x61/0x160 [ 55.741800][ T7233] tcp_recvmsg+0x63b/0x1a30 [ 55.746294][ T7233] inet_recvmsg+0xbb/0x250 [ 55.750686][ T7233] sock_recvmsg+0x92/0xb0 [ 55.755002][ T7233] sock_read_iter+0x15f/0x1e0 [ 55.759657][ T7233] new_sync_read+0x389/0x4f0 [ 55.764226][ T7233] __vfs_read+0xb1/0xc0 [ 55.768362][ T7233] vfs_read+0x143/0x2c0 [ 55.772521][ T7233] ksys_read+0xd5/0x1b0 [ 55.776647][ T7233] [ 55.778948][ T7233] Reported by Kernel Concurrency Sanitizer on: [ 55.785076][ T7233] CPU: 0 PID: 7233 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 55.792155][ T7233] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.802199][ T7233] ================================================================== [ 55.810233][ T7233] Kernel panic - not syncing: panic_on_warn set ... [ 55.816794][ T7233] CPU: 0 PID: 7233 Comm: syz-fuzzer Not tainted 5.3.0+ #0 [ 55.823873][ T7233] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.833900][ T7233] Call Trace: [ 55.837184][ T7233] dump_stack+0xf5/0x159 [ 55.841407][ T7233] panic+0x209/0x639 [ 55.845387][ T7233] ? sock_read_iter+0x15f/0x1e0 [ 55.850214][ T7233] ? vprintk_func+0x8d/0x140 [ 55.854786][ T7233] kcsan_report.cold+0xc/0x1b [ 55.859456][ T7233] __kcsan_setup_watchpoint+0x3ee/0x510 [ 55.864989][ T7233] __tsan_read8+0x2c/0x30 [ 55.869295][ T7233] ktime_get_seconds+0x49/0x60 [ 55.874052][ T7233] tcp_rcv_established+0xeeb/0xf50 [ 55.879145][ T7233] ? ipv4_dst_check+0xc6/0xf0 [ 55.883798][ T7233] tcp_v4_do_rcv+0x381/0x4e0 [ 55.888401][ T7233] __release_sock+0x135/0x1e0 [ 55.893073][ T7233] release_sock+0x61/0x160 [ 55.897476][ T7233] tcp_recvmsg+0x63b/0x1a30 [ 55.902024][ T7233] inet_recvmsg+0xbb/0x250 [ 55.906442][ T7233] ? __tsan_read8+0x2c/0x30 [ 55.910940][ T7233] ? inet_sendpage+0x100/0x100 [ 55.915687][ T7233] sock_recvmsg+0x92/0xb0 [ 55.920049][ T7233] sock_read_iter+0x15f/0x1e0 [ 55.924717][ T7233] new_sync_read+0x389/0x4f0 [ 55.929296][ T7233] __vfs_read+0xb1/0xc0 [ 55.933434][ T7233] vfs_read+0x143/0x2c0 [ 55.937576][ T7233] ksys_read+0xd5/0x1b0 [ 55.941713][ T7233] __x64_sys_read+0x4c/0x60 [ 55.946212][ T7233] do_syscall_64+0xcf/0x2f0 [ 55.950698][ T7233] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.956567][ T7233] RIP: 0033:0x47c530 [ 55.960463][ T7233] 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 [ 55.980045][ T7233] RSP: 002b:000000c4204f37d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 55.988432][ T7233] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 55.996395][ T7233] RDX: 0000000000001000 RSI: 000000c420134000 RDI: 0000000000000003 [ 56.004344][ T7233] RBP: 000000c4204f3830 R08: 0000000000000000 R09: 0000000000000000 [ 56.012291][ T7233] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000003 [ 56.020256][ T7233] R13: 000000c420020410 R14: 0000000000000002 R15: ffffffffffffffff [ 56.029686][ T7233] Kernel Offset: disabled [ 56.034007][ T7233] Rebooting in 86400 seconds..