Matthew wrote:
On 8/18/07, Edward Shishkin <edward@xxxxxxxxxxx> wrote:
Matthew wrote:
Edward,
I just encountered a pretty strange situation:
first some data:
I'm running hardened Gentoo with glibc 2.6.1 & gcc-4.2.1 both with
hardened use-flags enabled
- my kernel running is a 2.6.22-based kernel with grsecurity and some
other fine speed enhancements (ck-patchset, adaptive readahead, latest
reiser4 patch 2.6.22-2)
- this also happens with hardened-sources 2.6.22-r2 + latest reiser4
patch 2.6.22-2
every time I'm booting into that system I get a corrupted libuuid.so* file:
it says things like: libfoo isn't an elf-file or similar
it doesn't seem to matter if I'm using e2fsprogs 1.39 and
corresponding ss and com_err or e2fsprogs 1.40 with corresponding ss
and com_err, with booting I mean it only gets to that point and then
refuses and reboots since it's dependent on that critical thing (??)
other files also seem to get corrupted, I can't say which ones since
it reboots pretty fast
util-linux version is 2.12r-r7
it's strange to say but it doesn't matter if I'm booting the kernel
with ro or rw on /root data still gets corrupted (where /root is/was a
standard formatted reiser4 partition with mkfs.reiser4 out from a
livecd with 2.6.21-based kernel with reiser4-patch from namesys if I
recall right
there's also no difference whether I use the old baselayout-1 or the
new and faster baselayout-2 (for that I have to append 'rw' at boot
otherwise reiser4 won't boot since it isn't recognized right)
gcc-version is 4.2.1 hardened with pie 9.0.7, I'm sure this also would
happen with other gcc version
I'm attaching my kernel-config so that you might be able to reproduce
it (hopefully) or at least get an idea of it
since I need this pc right now I had to replay my system from a
tarball to a reiserfs partition, so I unfortunately can't collect any
further data
Mat
Hmm.. It would be nice to compare hexdumps of "corrupted" and original
files. Although, you have migrated to v3 already.. Well, I will keep it
in mind,
thanks for the report!
Edward.
Well, this time it didn't work out that well - all data lost ;( (this
occured on another laptop),
I compiled that kernel on that laptop but disabled pageexec, segmexec,
kernexec (I hoped that it would work that way ;) )
it nevertheless happened, at first only a few files seemed to be
missing (1st mount from a livecd), I copied over some files (see
attachment), umounted, then I ran fsck.reiser4 -q /dev/foo on that
partition and only those files were left !!!!!!
Would you please pack metadata by
debugfs.reiser4 -P /dev/xxx | gzip > meta.gz
and let me download the file meta.gz plus the list of
file names (for the files which unexpectedly get filled by zeros).
Thanks,
Edward.
(they're empty though, I opened them with khexedit and there are only zeros)
I've attached the kernel-config of that incident, hope it helps you
Mat
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