[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   35.141788][   T25] audit: type=1800 audit(1570389859.148:25): pid=7072 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[   35.174106][   T25] audit: type=1800 audit(1570389859.148:26): pid=7072 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[   35.194433][   T25] audit: type=1800 audit(1570389859.148:27): pid=7072 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 '10.128.0.13' (ECDSA) to the list of known hosts.
2019/10/06 19:24:29 fuzzer started
2019/10/06 19:24:30 dialing manager at 10.128.0.105:35709
2019/10/06 19:24:30 syscalls: 2523
2019/10/06 19:24:30 code coverage: enabled
2019/10/06 19:24:30 comparison tracing: enabled
2019/10/06 19:24:30 extra coverage: extra coverage is not supported by the kernel
2019/10/06 19:24:30 setuid sandbox: enabled
syzkaller login: [   46.363095][ T7223] ==================================================================
[   46.371397][ T7223] BUG: KCSAN: data-race in pipe_poll / pipe_write
[   46.377779][ T7223] 
[   46.380818][ T7223] read to 0xffff88812a2280f8 of 4 bytes by task 7218 on cpu 1:
[   46.388358][ T7223]  pipe_poll+0x84/0x1d0
[   46.392489][ T7223]  do_select+0x7d0/0x1020
[   46.396803][ T7223]  core_sys_select+0x38b/0x520
[   46.401560][ T7223]  kern_select+0x106/0x170
[   46.405953][ T7223]  __x64_sys_select+0x70/0x90
[   46.410607][ T7223]  do_syscall_64+0xcf/0x2f0
[   46.415091][ T7223]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   46.420950][ T7223] 
[   46.423267][ T7223] write to 0xffff88812a2280f8 of 4 bytes by task 7223 on cpu 0:
[   46.430872][ T7223]  pipe_write+0x268/0x970
[   46.435177][ T7223]  new_sync_write+0x388/0x4a0
[   46.439828][ T7223]  __vfs_write+0xb1/0xc0
[   46.444046][ T7223]  vfs_write+0x18a/0x390
[   46.448278][ T7223]  ksys_write+0xd5/0x1b0
[   46.452564][ T7223]  __x64_sys_write+0x4c/0x60
[   46.457144][ T7223]  do_syscall_64+0xcf/0x2f0
[   46.461891][ T7223]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   46.468026][ T7223] 
[   46.470336][ T7223] Reported by Kernel Concurrency Sanitizer on:
[   46.476478][ T7223] CPU: 0 PID: 7223 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[   46.483571][ T7223] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   46.493604][ T7223] ==================================================================
[   46.501638][ T7223] Kernel panic - not syncing: panic_on_warn set ...
[   46.508202][ T7223] CPU: 0 PID: 7223 Comm: syz-fuzzer Not tainted 5.3.0+ #0
[   46.515453][ T7223] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   46.525481][ T7223] Call Trace:
[   46.528752][ T7223]  dump_stack+0xf5/0x159
[   46.532987][ T7223]  panic+0x209/0x639
[   46.536863][ T7223]  ? vprintk_func+0x8d/0x140
[   46.541443][ T7223]  kcsan_report.cold+0x57/0xeb
[   46.546365][ T7223]  __kcsan_setup_watchpoint+0x342/0x500
[   46.551904][ T7223]  __tsan_write4+0x32/0x40
[   46.556324][ T7223]  pipe_write+0x268/0x970
[   46.560709][ T7223]  new_sync_write+0x388/0x4a0
[   46.565371][ T7223]  __vfs_write+0xb1/0xc0
[   46.569643][ T7223]  vfs_write+0x18a/0x390
[   46.573877][ T7223]  ksys_write+0xd5/0x1b0
[   46.578251][ T7223]  __x64_sys_write+0x4c/0x60
[   46.582837][ T7223]  do_syscall_64+0xcf/0x2f0
[   46.587330][ T7223]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   46.593202][ T7223] RIP: 0033:0x47c530
[   46.597086][ T7223] 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
[   46.616667][ T7223] RSP: 002b:000000c420147938 EFLAGS: 00000216 ORIG_RAX: 0000000000000001
[   46.625056][ T7223] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[   46.633008][ T7223] RDX: 000000000000002f RSI: 000000c420080280 RDI: 0000000000000002
[   46.640969][ T7223] RBP: 000000c420147990 R08: 0000000000000000 R09: 0000000000000000
[   46.648916][ T7223] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff
[   46.656864][ T7223] R13: 0000000000000054 R14: 0000000000000053 R15: 0000000000000100
[   46.666286][ T7223] Kernel Offset: disabled
[   46.670631][ T7223] Rebooting in 86400 seconds..