[  OK  ] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts.
executing program
BUG: memory leak
unreferenced object 0xffff888101ab2e00 (size 120):
  comm "kworker/u4:3", pid 435, jiffies 4294954715 (age 8.260s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000d6941a67>] alloc_pid+0x66/0x560 kernel/pid.c:180
    [<00000000059ed407>] copy_process+0x143b/0x25c0 kernel/fork.c:2113
    [<0000000094b101dd>] kernel_clone+0xf3/0x670 kernel/fork.c:2462
    [<000000005a3532ec>] kernel_thread+0x61/0x80 kernel/fork.c:2514
    [<00000000ead3779b>] call_usermodehelper_exec_work kernel/umh.c:172 [inline]
    [<00000000ead3779b>] call_usermodehelper_exec_work+0xc4/0x120 kernel/umh.c:158
    [<000000009b7723f0>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275
    [<000000008d4dc0ab>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421
    [<00000000bc7f8e2f>] kthread+0x178/0x1b0 kernel/kthread.c:292
    [<00000000b16a5fb8>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296