On 11 Jan 2006, at 20.37, Blaisorblade wrote:
On Thursday 12 January 2006 02:28, Adam Atlas wrote:
I'm trying to run a UML system. Specifically, I'm using Umlazi
(though I have this problem even if I run the kernel manually), with
the prebuilt Debian-Woody-Base + UMLconfig system. I've tried three
kernels -- linux-2.4.22-xfs5um, linux-2.4.26-20040615-1um, and
vmlinux-2.6.14.3-bs3. In every case, the kernel dies thusly:
kjournald starting. Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
VFS: Mounted root (ext3 filesystem) readonly.
Mounted devfs on /dev
init_new_context_skas - new_mm failed, errno = -13
init_new_context_skas - new_mm failed, errno = -13
Kernel panic: No init found. Try passing init= option to kernel.
I've messed around with the kernel options, but to no avail. Any
ideas?
Never seen this.
You have something strange - it can't write on /proc/mm (13 = EACCES,
permission denied). But it thinks it's on a SKAS host.
SKAS-patched the host? It's a 32-bit one, right?
If not you need to enable TT mode for the guest (for 2.4.x)
If yes, instead, can you post result of ls -l /proc/mm?
For that 2.6 I expect you have another error from the guest.
I haven't SKAS-patched the host. I know it would be best to do so,
but I'm wary of trying to, because I'm not very familiar with kernel
compilation, and I don't have physical access to this machine. (It's
a colocated server. I hope to use it for virtual hosting, and thus
I'd like to use UML to increase security by isolating services and
clients.) But I think Grub has some sort of fallback option, so I
suppose I can give it a try. I'm running 2.6.12-10-386 as my host. Is
that SKAS-patchable?
Anyway, you are correct, that was not the error message I got with
all the precompiled kernels. I was mistaken; I had different problems
with other kernels. But before I try any further debugging, I shall
try the SKAS patch. Do you know where I'd find one compatible with my
host?
Thanks for the assistance.
- Adam
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