[   53.363345][   T26] audit: type=1800 audit(1572908103.220:30): pid=7862 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.242' (ECDSA) to the list of known hosts.
2019/11/04 22:55:12 fuzzer started
2019/11/04 22:55:14 dialing manager at 10.128.0.105:42499
2019/11/04 22:55:14 syscalls: 2553
2019/11/04 22:55:14 code coverage: enabled
2019/11/04 22:55:14 comparison tracing: enabled
2019/11/04 22:55:14 extra coverage: extra coverage is not supported by the kernel
2019/11/04 22:55:14 setuid sandbox: enabled
2019/11/04 22:55:14 namespace sandbox: enabled
2019/11/04 22:55:14 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/04 22:55:14 fault injection: enabled
2019/11/04 22:55:14 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/04 22:55:14 net packet injection: enabled
2019/11/04 22:55:14 net device setup: enabled
2019/11/04 22:55:14 concurrency sanitizer: enabled
syzkaller login: [   65.014373][ T8030] ==================================================================
[   65.022634][ T8030] BUG: KCSAN: data-race in pipe_poll / pipe_write
[   65.029037][ T8030] 
[   65.031356][ T8030] read to 0xffff8881238e94b8 of 4 bytes by task 8013 on cpu 0:
[   65.038885][ T8030]  pipe_poll+0x84/0x1d0
[   65.043026][ T8030]  do_select+0x7d0/0x1020
[   65.047341][ T8030]  core_sys_select+0x381/0x550
[   65.052086][ T8030]  kern_select+0x106/0x170
[   65.056485][ T8030]  __x64_sys_select+0x70/0x90
[   65.061163][ T8030]  do_syscall_64+0xcc/0x370
[   65.065654][ T8030]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   65.071531][ T8030] 
[   65.073847][ T8030] write to 0xffff8881238e94b8 of 4 bytes by task 8030 on cpu 1:
[   65.081892][ T8030]  pipe_write+0x268/0x970
[   65.086563][ T8030]  new_sync_write+0x388/0x4a0
[   65.091317][ T8030]  __vfs_write+0xb1/0xc0
[   65.095548][ T8030]  vfs_write+0x18a/0x390
[   65.099776][ T8030]  ksys_write+0xd5/0x1b0
[   65.104095][ T8030]  __x64_sys_write+0x4c/0x60
[   65.108670][ T8030]  do_syscall_64+0xcc/0x370
[   65.113244][ T8030]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   65.119546][ T8030] 
[   65.121853][ T8030] Reported by Kernel Concurrency Sanitizer on:
[   65.127990][ T8030] CPU: 1 PID: 8030 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0
[   65.135458][ T8030] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   65.145753][ T8030] ==================================================================
[   65.153815][ T8030] Kernel panic - not syncing: panic_on_warn set ...
[   65.160386][ T8030] CPU: 1 PID: 8030 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0
[   65.167930][ T8030] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   65.177983][ T8030] Call Trace:
[   65.181262][ T8030]  dump_stack+0xf5/0x159
[   65.185492][ T8030]  panic+0x210/0x640
[   65.189386][ T8030]  ? vprintk_func+0x8d/0x140
[   65.193967][ T8030]  kcsan_report.cold+0xc/0xe
[   65.198543][ T8030]  kcsan_setup_watchpoint+0x3fe/0x410
[   65.203903][ T8030]  __tsan_unaligned_write4+0x143/0x1f0
[   65.209379][ T8030]  pipe_write+0x268/0x970
[   65.213705][ T8030]  new_sync_write+0x388/0x4a0
[   65.218374][ T8030]  __vfs_write+0xb1/0xc0
[   65.222625][ T8030]  vfs_write+0x18a/0x390
[   65.226855][ T8030]  ksys_write+0xd5/0x1b0
[   65.231084][ T8030]  __x64_sys_write+0x4c/0x60
[   65.235662][ T8030]  do_syscall_64+0xcc/0x370
[   65.240169][ T8030]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   65.246043][ T8030] RIP: 0033:0x47c530
[   65.249928][ T8030] 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
[   65.269537][ T8030] RSP: 002b:000000c4203a7938 EFLAGS: 00000216 ORIG_RAX: 0000000000000001
[   65.277939][ T8030] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[   65.285905][ T8030] RDX: 0000000000000050 RSI: 000000c42007c000 RDI: 0000000000000002
[   65.293876][ T8030] RBP: 000000c4203a7990 R08: 0000000000000000 R09: 0000000000000000
[   65.301919][ T8030] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff
[   65.309879][ T8030] R13: 000000000000000a R14: 0000000000000009 R15: 0000000000000080
[   65.319223][ T8030] Kernel Offset: disabled
[   65.327200][ T8030] Rebooting in 86400 seconds..