TIFF file corruption with 2.6.23 kernel

[Ade Rixon]

This is just a heads-up until I can dig further into this issue. I'm
running under Fedora 7 with all recent updates. After going from the
2.6.22.1-41 kernel RPM to 2.6.23.1-21, I've discovered that LZ 2.4 is
exporting TIFF files that produce "cannot handle zero scanline size"
errors from libtiff-enabled applications (e.g. ImageMagick). After booting
back to the 2.6.22 kernel and re-exporting, the problem goes away. diff
confirms that the exported TIFFs between the two kernels are different.
I'm guessing that there is some kind of weird memory corruption bug in the
later kernel, at least in Fedora; I haven't had chance to browse the
bugzilla database yet.

Note also that 2.6.23 is the installed default with Fedora 8.

Ade_
  /
--
[   Ade Rixon || http://www.big-bubbles.fluff.org/ || ade.rixon@...   ]
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  - Eels
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[Ade Rixon]

An update after further investigation and testing: this appears to be
known bug #398421 in the 2.6.23.1-21 kernel.
        https://bugzilla.redhat.com/show_bug.cgi?id=398421
It only occurs when writing files to NFS-mounted filesystems, which
probably isn't a common setup for most home users. The workarounds are to
either revert to a 2.6.22 kernel, write to a locally-mounted filesystem
(e.g. /var/tmp) or upgrade to the 2.6.23.8-34 testing kernel. Note that
this bug has been reported to cause file corruption in other graphics apps
as well, such as the GIMP.

Ade_
  /
--
[   Ade Rixon || http://www.big-bubbles.fluff.org/ || ade.rixon@...   ]
 '"Do you update your anti-virus software regularly?" I'll ask them. Most
  look at me as though I'd just asked them if they refloozle their
  hossenblobbets with tinklewickets.' - Scott Granneman
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