[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.928743][ T25] audit: type=1800 audit(1571253006.324:25): pid=6992 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 35.948647][ T25] audit: type=1800 audit(1571253006.324:26): pid=6992 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 35.969412][ T25] audit: type=1800 audit(1571253006.324:27): pid=6992 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 '10.128.1.48' (ECDSA) to the list of known hosts. 2019/10/16 19:10:13 fuzzer started 2019/10/16 19:10:14 dialing manager at 10.128.0.105:33899 2019/10/16 19:10:14 syscalls: 2524 2019/10/16 19:10:14 code coverage: enabled 2019/10/16 19:10:14 comparison tracing: enabled 2019/10/16 19:10:14 extra coverage: extra coverage is not supported by the kernel 2019/10/16 19:10:14 setuid sandbox: enabled 2019/10/16 19:10:14 namespace sandbox: enabled 2019/10/16 19:10:14 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/16 19:10:14 fault injection: enabled 2019/10/16 19:10:14 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/16 19:10:14 net packet injection: enabled 2019/10/16 19:10:14 net device setup: enabled 2019/10/16 19:10:14 concurrency sanitizer: enabled syzkaller login: [ 45.505000][ T7148] ================================================================== [ 45.513135][ T7148] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 45.521053][ T7148] [ 45.523376][ T7148] write to 0xffffffff86040b08 of 280 bytes by interrupt on cpu 0: [ 45.531201][ T7148] timekeeping_advance+0x893/0xd80 [ 45.536292][ T7148] update_wall_time+0x19/0x20 [ 45.540961][ T7148] tick_do_update_jiffies64+0x1ae/0x260 [ 45.546483][ T7148] tick_sched_do_timer+0xd4/0xe0 [ 45.551428][ T7148] tick_sched_timer+0x43/0xe0 [ 45.556149][ T7148] __hrtimer_run_queues+0x288/0x600 [ 45.561361][ T7148] hrtimer_interrupt+0x22a/0x480 [ 45.566338][ T7148] smp_apic_timer_interrupt+0xdc/0x280 [ 45.571830][ T7148] apic_timer_interrupt+0xf/0x20 [ 45.576746][ T7148] __kcsan_setup_watchpoint+0x8/0x510 [ 45.582094][ T7148] __tsan_read1+0x2c/0x30 [ 45.586529][ T7148] get_l4proto+0x15d/0x270 [ 45.590933][ T7148] nf_conntrack_in+0x160/0xa80 [ 45.595741][ T7148] ipv4_conntrack_in+0x27/0x40 [ 45.600522][ T7148] [ 45.602833][ T7148] read to 0xffffffff86040b80 of 8 bytes by task 7148 on cpu 1: [ 45.610352][ T7148] ktime_get_seconds+0x45/0x70 [ 45.615290][ T7148] tcp_rcv_established+0xeeb/0xf50 [ 45.620378][ T7148] tcp_v4_do_rcv+0x381/0x4e0 [ 45.624954][ T7148] __release_sock+0x135/0x1e0 [ 45.629604][ T7148] release_sock+0x61/0x160 [ 45.633996][ T7148] tcp_recvmsg+0x63b/0x1a30 [ 45.638484][ T7148] inet_recvmsg+0xbb/0x250 [ 45.642879][ T7148] sock_recvmsg+0x92/0xb0 [ 45.647269][ T7148] sock_read_iter+0x15f/0x1e0 [ 45.651931][ T7148] new_sync_read+0x389/0x4f0 [ 45.656505][ T7148] __vfs_read+0xb1/0xc0 [ 45.660637][ T7148] vfs_read+0x143/0x2c0 [ 45.664776][ T7148] ksys_read+0xd5/0x1b0 [ 45.668900][ T7148] [ 45.671208][ T7148] Reported by Kernel Concurrency Sanitizer on: [ 45.677349][ T7148] CPU: 1 PID: 7148 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 45.684776][ T7148] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.694815][ T7148] ================================================================== [ 45.702850][ T7148] Kernel panic - not syncing: panic_on_warn set ... [ 45.709420][ T7148] CPU: 1 PID: 7148 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 45.716844][ T7148] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.726889][ T7148] Call Trace: [ 45.730159][ T7148] dump_stack+0xf5/0x159 [ 45.734505][ T7148] panic+0x210/0x640 [ 45.738387][ T7148] ? sock_read_iter+0x15f/0x1e0 [ 45.743223][ T7148] ? vprintk_func+0x8d/0x140 [ 45.747796][ T7148] kcsan_report.cold+0xc/0x1b [ 45.752456][ T7148] __kcsan_setup_watchpoint+0x3ee/0x510 [ 45.757978][ T7148] __tsan_read8+0x2c/0x30 [ 45.762283][ T7148] ktime_get_seconds+0x45/0x70 [ 45.767152][ T7148] tcp_rcv_established+0xeeb/0xf50 [ 45.772241][ T7148] ? ipv4_dst_check+0xc6/0xf0 [ 45.776914][ T7148] tcp_v4_do_rcv+0x381/0x4e0 [ 45.781525][ T7148] __release_sock+0x135/0x1e0 [ 45.786180][ T7148] release_sock+0x61/0x160 [ 45.790625][ T7148] tcp_recvmsg+0x63b/0x1a30 [ 45.795123][ T7148] inet_recvmsg+0xbb/0x250 [ 45.799519][ T7148] ? __tsan_read8+0x2c/0x30 [ 45.804010][ T7148] ? inet_sendpage+0x100/0x100 [ 45.808764][ T7148] sock_recvmsg+0x92/0xb0 [ 45.813086][ T7148] sock_read_iter+0x15f/0x1e0 [ 45.817917][ T7148] new_sync_read+0x389/0x4f0 [ 45.822488][ T7148] __vfs_read+0xb1/0xc0 [ 45.826637][ T7148] vfs_read+0x143/0x2c0 [ 45.830814][ T7148] ksys_read+0xd5/0x1b0 [ 45.835398][ T7148] __x64_sys_read+0x4c/0x60 [ 45.839894][ T7148] do_syscall_64+0xcc/0x370 [ 45.844385][ T7148] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 45.850267][ T7148] RIP: 0033:0x47c530 [ 45.854197][ T7148] 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 [ 45.873779][ T7148] RSP: 002b:000000c4203b57d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 45.882164][ T7148] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 45.890123][ T7148] RDX: 0000000000001000 RSI: 000000c420352000 RDI: 0000000000000003 [ 45.898082][ T7148] RBP: 000000c4203b5830 R08: 0000000000000000 R09: 0000000000000000 [ 45.906039][ T7148] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000010 [ 45.914006][ T7148] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 45.923408][ T7148] Kernel Offset: disabled [ 45.927729][ T7148] Rebooting in 86400 seconds..