UML troubles
Hi!
Maybe someone has tried UML kernel on grsec machine? I took that Debian
precompiled UML kernel, run it with "linux root=/servers/moon
" (that /servers/moon is one of my production servers' ext2 partition image),
but UML says:
...
mconsole (version 2) initialized on /root/.uml/N7Jm6p/mconsole
unable to open root_fs for validation
Initializing stdio console driver
NET4: Linux TCP/IP 1.0 for NET4.0
And that's all... no further messages, nothing. The modules required for this
kernel has been put inside the image. The host kernel is with grsec patches,.
and it tells in /var/log something about resource overstep:
Aug 16 17:13:51 localhost kernel: grsec: attempted resource overstep by
requesting 494927872 for RLIMIT_STACK against limit 8388608
by /usr/bin/linux[linux:29530] uid/euid:0/0 gid/egid:0/0,
parent /usr/bin/linux[linux:2566] uid/euid:0/0 gid/egid:0/0
Any ideas?
Thanks,
Dmitry
For your reference, the complete output running UML:
virtual:~# linux root=/servers/moon
Checking for the skas3 patch in the host...not found
Checking for /proc/mm...not found
tracing thread pid = 8253
Checking for /dev/anon on the host...Not available (open failed with errno 2)
Checking for /dev/anon on the host...Not available (open failed with errno 2)
Checking for /dev/anon on the host...Not available (open failed with errno 2)
Checking for /dev/anon on the host...Not available (open failed with errno 2)
Linux version 2.4.26-2um (root@mizar) (gcc version 3.3.4 (Debian 1:3.3.4-3))
#2 Fri Jul 16 17:51:17 PDT 2004
On node 0 totalpages: 8192
zone(0): 8192 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: root=/servers/moon
Calibrating delay loop... 989.59 BogoMIPS
Memory: 28148k available
Dentry cache hash table entries: 4096 (order: 3, 32768 bytes)
Inode cache hash table entries: 2048 (order: 2, 16384 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 8192 (order: 3, 32768 bytes)
Checking for host processor cmov support...Yes
Checking for host processor xmm support...No
Checking that ptrace can change system call numbers...OK
Checking that host ptys support output SIGIO...Yes
Checking that host ptys support SIGIO on close...No, enabling workaround
POSIX conformance testing by UNIFIX
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd
VFS: Disk quotas vdquot_6.5.1
Journalled Block Device driver loaded
devfs: v1.12c (20020818) Richard Gooch (rgooch@atnf.csiro.au)
devfs: boot_options: 0x0
SGI XFS with ACLs, no debug enabled
SGI XFS Quota Management subsystem
Disabling 2.6 AIO in tt mode
pty: 256 Unix98 ptys configured
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
loop: loaded (max 8 devices)
Initializing Cryptographic API
Initializing software serial port version 1
mconsole (version 2) initialized on /root/.uml/N7Jm6p/mconsole
unable to open root_fs for validation
Initializing stdio console driver
NET4: Linux TCP/IP 1.0 for NET4.0
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