Doesn't work on recent envs (Ubuntu 19.04, Docker 19.03+) about diuid HOT 3 CLOSED

root@f5219086a599:/# /linux/linux rootfstype=hostfs rw quiet eth0=slirp,,/usr/bin/slirp-fullbolt mem=2G init=/init.sh
Core dump limits :
        soft - NONE
        hard - NONE
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...OK
Checking advanced syscall emulation patch for ptrace...OK
Checking environment variables for a tempdir.../umlshm
Checking if /umlshm is on tmpfs...OK
Checking PROT_EXEC mmap in /umlshm...OK
Adding 29483008 bytes to physical memory to account for exec-shield gap
Failed to initialize ubd device 0 :Couldn't determine size of device's file
Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

CPU: 0 PID: 1 Comm: init.sh Not tainted 4.8.2 #1
Stack:
 6010d427 ffffffffffa6b277 e1861a98 00000400
 606b0140 606a21b0 e185eb80 0000df90
 00000000 606a21b0 e1861ad0 602ead74
Call Trace:
 [<600956cc>] ? os_is_signal_stack+0x36/0x44
 [<6010d427>] ? printk+0x0/0xab
 [<6007e8b2>] show_stack+0x165/0x1e1
 [<6010d427>] ? printk+0x0/0xab
 [<602ead74>] dump_stack+0x4e/0x53
 [<6010d0f4>] panic+0x1a8/0x38b
 [<6010cf4c>] ? panic+0x0/0x38b
 [<6016402d>] ? __fput+0x215/0x224
 [<601027f9>] ? cgroup_exit+0xb5/0xfd
 [<600a1c11>] do_exit+0x48a/0xa36
 [<600aa2af>] ? __sigqueue_free+0x6d/0x75
 [<600aa62c>] ? recalc_sigpending+0x40/0x92
 [<600a22fa>] do_group_exit+0xc9/0x150
 [<600ada1b>] get_signal+0x565/0x5a0
 [<600952b2>] ? block_signals+0x0/0x2b
 [<600ac105>] ? do_signal_stop+0x0/0x2ee
 [<6007e54d>] do_signal+0x5e/0x155
 [<6007e32c>] ? handle_signal+0x0/0x1c3
 [<600ac4f1>] ? force_sig_info+0xfe/0x110
 [<60095519>] ? set_signals+0x0/0x50
 [<600acc80>] ? force_sig+0x2f/0x31
 [<600801b5>] fatal_sigsegv+0x6a/0x79
 [<60097b64>] userspace+0x19a/0x586
 [<6016de5a>] ? getname_kernel+0x11a/0x150
 [<6016adac>] ? do_execve+0x38/0x3a
 [<6007b1b4>] ? run_init_process+0x64/0x6c
 [<6007ce94>] new_thread_handler+0xc2/0xcd

Aborted (core dumped)