Re: [Libguestfs] libguestfs-test-tool on ubuntu: kernel panic

On Wed, Aug 10, 2011 at 10:46 AM, Richard W.M. Jones <rjones(a)redhat.com&gt;wrote: > On Wed, Aug 10, 2011 at 09:42:10AM -0700, David Konerding wrote: > > BTW, it's actually a list of ~8000 files (looks like all the unpacked > files > > from all the .debs that got downloadeD). > > > > I stopped feboostrap during its download after it downloaded the .deb > for > > bash (there seems to be no option to force febootstrap to not clean up > > /tmp/febootstrap* after running). > > > > I see no reason why feboostrap wouldn't be able to read these files: > > 2318338 4 drwxr-xr-x 2 dek redacted 4096 Aug 10 09:39 > > /tmp/bashpkg/bin > > 2318444 0 lrwxrwxrwx 1 dek redacted 4 Aug 10 09:39 > > /tmp/bashpkg/bin/sh -> bash > > 2318443 0 lrwxrwxrwx 1 dek redacted 4 Aug 10 09:39 > > /tmp/bashpkg/bin/rbash -> bash > > 2318339 920 -rwxr-xr-x 1 dek redacted 934336 Apr 18 2010 > > /tmp/bashpkg/bin/bash > > I would agree this certainly looks like a bug in febootstrap. I can't > imagine what it would be that wouldn't also affect our builds on > Ubuntu 11.04. > > Here is a way you could try reproducing the issue, in a smaller and > more manageable context. > > You can run all of the commands below as non-root from /tmp or another > temporary directory. > > First: > > $ febootstrap --verbose --names bash > > then examine the debug messages and the output files created in the > current directory ('base.img' and 'hostfiles'). > > This fetches bash, dash, and a number of other packages. It reports: 1719 files and directories febootstrap: warning: some host files are unreadable by non-root febootstrap: warning: get your distro to fix these files: /bin/bash /bin/cat /bin/chgrp /bin/chmod ... There are 1361 files in the list. > If base.img and hostfiles look reasonable, try building an appliance > from them: > > Looking at hostfiles, there is no /bin/bash, but there is /bin/sh and /bin/rbash (BTW, Ubuntu uses dash as the main /bin/sh, not bash, but I assume that's not relevant). sh is a symlink to bash, as is rbash. I extracted base.img, and it doesn't include any files in /bin. It looks like all the files in that archive are text/config files or symlinks. $ febootstrap-supermin-helper -f ext2 -v \ > base.img hostfiles $(uname -m) kernel initrd appliance > > (Note that 'kernel', 'initrd' and 'appliance' are all output files > that will be created in the current directory). > > Now you've got a chicken-and-egg problem, but 'appliance' is an ext2 > disk image which can be examined using guestfish: > > $ guestfish --ro -a appliance -m /dev/sda > > Right. I just mounted it as a loopback image instead... /bin contains only this: $ ls -l /mnt/appliance/bin total 8 lrwxrwxrwx 1 root root 4 Sep 22 2010 rbash -> bash lrwxrwxrwx 1 root root 9 Sep 22 2010 sh -> /bin/bash Running strace on febootstrap, I see that it stats the /bin/bash in the unpacked bash deb pkg at least once successfully: 7928 lstat("/tmp/febootstrape193191fefe36c245623bc48e5b150a2.tmp/bash_4.1-2ubuntu3_amd64.deb.d//bin/bash", {st_mode=S_IFREG|0750, st_size=934336, ...}) = 0 7928 write(2, "febootstrap: warning: some host files are unreadable by non-root\nfebootstrap: warning: get your distro to fix these files:\n\t/bin/bash\n", 134) = 134 > Welcome to guestfish, the libguestfs filesystem interactive shell for > editing virtual machine filesystems. > > Type: 'help' for help on commands > 'man' to read the manual > 'quit' to quit the shell > > ><fs> ll /bin/ > total 2668 > drwxr-xr-x 2 1000 1000 4096 Aug 10 17:40 . > drwxr-xr-x 17 1000 1000 4096 Aug 10 17:41 .. > -rwxr-xr-x 1 0 0 954896 Mar 31 21:20 bash > -rwxr-xr-x 1 0 0 47696 Feb 23 14:24 cat > -rwxr-xr-x 1 0 0 55864 Feb 23 14:24 chgrp > -rwxr-xr-x 1 0 0 51704 Feb 23 14:24 chmod > -rwxr-xr-x 1 0 0 55880 Feb 23 14:24 chown > -rwxr-xr-x 1 0 0 117808 Feb 23 14:24 cp > -rwxr-xr-x 1 0 0 109736 Nov 15 2010 dash > -rwxr-xr-x 1 0 0 55832 Feb 23 14:24 date > -rwxr-xr-x 1 0 0 51840 Feb 23 14:24 dd > -rwxr-xr-x 1 0 0 64208 Feb 23 14:24 df > -rwxr-xr-x 1 0 0 105776 Feb 23 14:24 dir > -rwxr-xr-x 1 0 0 26968 Feb 23 14:24 echo > -rwxr-xr-x 1 0 0 22856 Feb 23 14:24 false > -rwxr-xr-x 1 0 0 47680 Feb 23 14:24 ln > -rwxr-xr-x 1 0 0 105776 Feb 23 14:24 ls > -rwxr-xr-x 1 0 0 47624 Feb 23 14:24 mkdir > -rwxr-xr-x 1 0 0 31112 Feb 23 14:24 mknod > -rwxr-xr-x 1 0 0 35352 Feb 23 14:24 mktemp > -rwxr-xr-x 1 0 0 109584 Feb 23 14:24 mv > -rwxr-xr-x 1 0 0 31200 Feb 23 14:24 pwd > lrwxrwxrwx 1 0 0 4 Jul 20 21:19 rbash -> bash > -rwxr-xr-x 1 0 0 35272 Feb 23 14:24 readlink > -rwxr-xr-x 1 0 0 55872 Feb 23 14:24 rm > -rwxr-xr-x 1 0 0 39320 Feb 23 14:24 rmdir > -rwxr-xr-x 1 0 0 15048 Jan 20 2011 run-parts > lrwxrwxrwx 1 0 0 4 Jul 20 21:19 sh -> dash > -rwxr-xr-x 1 0 0 26984 Feb 23 14:24 sleep > -rwxr-xr-x 1 0 0 63992 Feb 23 14:24 stty > -rwxr-xr-x 1 0 0 22872 Feb 23 14:24 sync > -rwxr-xr-x 1 0 0 10312 Jan 20 2011 tempfile > -rwxr-xr-x 1 0 0 47640 Feb 23 14:24 touch > -rwxr-xr-x 1 0 0 22856 Feb 23 14:24 true > -rwxr-xr-x 1 0 0 27016 Feb 23 14:24 uname > -rwxr-xr-x 1 0 0 105776 Feb 23 14:24 vdir > -rwxr-xr-x 1 0 0 946 Jan 20 2011 which > > (The above output was from Ubuntu 11.04) > > Rich. > > -- > Richard Jones, Virtualization Group, Red Hat > http://people.redhat.com/~rjones > libguestfs lets you edit virtual machines. Supports shell scripting, > bindings from many languages. http://libguestfs.org >