Warning: Permanently added '10.128.0.55' (ECDSA) to the list of known hosts.
2019/12/13 17:57:43 fuzzer started
2019/12/13 17:57:44 dialing manager at 10.128.0.105:45083
2019/12/13 17:57:44 checking machine...
2019/12/13 17:57:44 checking revisions...
2019/12/13 17:57:44 testing simple program...
syzkaller login: [   53.862615][ T7772] IPVS: ftp: loaded support on port[0] = 21
2019/12/13 17:57:44 building call list...
[   54.215221][   T21] tipc: TX() has been purged, node left!
executing program
[   56.895936][ T7778] ==================================================================
[   56.904205][ T7778] BUG: KCSAN: data-race in exit_signals / kthread_unpark
[   56.911214][ T7778] 
[   56.913566][ T7778] write to 0xffff88812aeee0a4 of 4 bytes by task 7779 on cpu 1:
[   56.921190][ T7778]  exit_signals+0x13b/0x490
[   56.927751][ T7778]  do_exit+0x188/0x18c0
[   56.934450][ T7778]  kthread+0x17f/0x200
[   56.940220][ T7778]  ret_from_fork+0x1f/0x30
[   56.945350][ T7778] 
[   56.948821][ T7778] read to 0xffff88812aeee0a4 of 4 bytes by task 7778 on cpu 0:
[   56.957627][ T7778]  kthread_unpark+0x24/0xe0
[   56.962128][ T7778]  kthread_stop+0xe0/0x390
[   56.966573][ T7778]  destroy_workqueue+0xd9/0x4b0
[   56.971417][ T7778]  ucma_close+0x192/0x1b0
[   56.975734][ T7778]  __fput+0x1e1/0x520
[   56.979758][ T7778]  ____fput+0x1f/0x30
[   56.983753][ T7778]  task_work_run+0xf6/0x130
[   56.988249][ T7778]  exit_to_usermode_loop+0x2b4/0x2c0
[   56.993524][ T7778]  do_syscall_64+0x384/0x3a0
[   56.998102][ T7778]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   57.003971][ T7778] 
[   57.006281][ T7778] Reported by Kernel Concurrency Sanitizer on:
[   57.012422][ T7778] CPU: 0 PID: 7778 Comm: syz-fuzzer Not tainted 5.5.0-rc1-syzkaller #0
[   57.020643][ T7778] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   57.034565][ T7778] ==================================================================
[   57.045785][ T7778] Kernel panic - not syncing: panic_on_warn set ...
[   57.053745][ T7778] CPU: 0 PID: 7778 Comm: syz-fuzzer Not tainted 5.5.0-rc1-syzkaller #0
[   57.062214][ T7778] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   57.072284][ T7778] Call Trace:
[   57.075764][ T7778]  dump_stack+0x11d/0x181
[   57.080082][ T7778]  panic+0x210/0x640
[   57.084102][ T7778]  ? vprintk_func+0x8d/0x140
[   57.088699][ T7778]  kcsan_report.cold+0xc/0xd
[   57.093288][ T7778]  kcsan_setup_watchpoint+0x3fe/0x460
[   57.098777][ T7778]  __tsan_read4+0xc6/0x100
[   57.103180][ T7778]  kthread_unpark+0x24/0xe0
[   57.107699][ T7778]  kthread_stop+0xe0/0x390
[   57.112163][ T7778]  ? preempt_count_add+0x6f/0xb0
[   57.117094][ T7778]  destroy_workqueue+0xd9/0x4b0
[   57.122082][ T7778]  ? __read_once_size+0x41/0xe0
[   57.127166][ T7778]  ucma_close+0x192/0x1b0
[   57.131854][ T7778]  __fput+0x1e1/0x520
[   57.136360][ T7778]  ? ucma_free_ctx+0x600/0x600
[   57.141221][ T7778]  ____fput+0x1f/0x30
[   57.146108][ T7778]  task_work_run+0xf6/0x130
[   57.152125][ T7778]  exit_to_usermode_loop+0x2b4/0x2c0
[   57.157557][ T7778]  do_syscall_64+0x384/0x3a0
[   57.162236][ T7778]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   57.168248][ T7778] RIP: 0033:0x47c530
[   57.172394][ T7778] 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
[   57.192692][ T7778] RSP: 002b:000000c420051508 EFLAGS: 00000216 ORIG_RAX: 0000000000000003
[   57.201100][ T7778] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000047c530
[   57.209219][ T7778] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
[   57.217334][ T7778] RBP: 000000c420051550 R08: 0000000000000000 R09: 0000000000000000
[   57.225539][ T7778] R10: 0000000000000000 R11: 0000000000000216 R12: ffffffffffffffff
[   57.236505][ T7778] R13: 0000000000000053 R14: 0000000000000052 R15: 0000000000000100
[   57.248004][ T7778] Kernel Offset: disabled
[   57.252351][ T7778] Rebooting in 86400 seconds..