Reiser4 on 2.6.31.4 freezes process accessing file, fsck 1.0.7 finds no inconsistency

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Hi!

I am running reiser4 for a few years now without problems. Yesterday I
had an undeletable directory which ls -a reported empty but rmdir
claimed not to be empty. There were no kernel messages about it. After
fsck-ing I had to run fsck.reiser4 --build-fs (reiser4progs 1.0.7) which
finished but printed an error at the very end like "application error"
(sorry, I didn't wrote it down). A second run of fsck.reiser4 told me to
fix some remaining corruptions using --fix. This worked without error
messages and a following fsck told me everything is OK.

But then accessing a file froze the process, consuming 100% CPU. I tried
cat and cp with same result. The processes could not be terminated nor
killed. Still no kernel messages. Only rebooting helped here and a
following fsck showed no corruptions. The file could be renamed and
deleted which kind of solved the problem. I haven't found (yet) another
file like this.

Before deleting the bad file I did a debugfs.reiser4 -P to store the
metadata so if anyone is interested in debugging this bug contact me to
give you the file (34MB bz2).

Konstantin

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