I have retested the old discs that caused this problem, and it doesnt
recur - however I note a new problem on the original disc - only the
first session is mounted, the following is logged in the syslog:
==============================================================
UDF-fs: warning (device loop0): udf_load_vrs: No anchor found
==============================================================
So presumably the UDF code is more error-tolerant now. I've also noticed
that in today's kernel update (from my perspective, that I havent
applied yet):
==============================================================
- udf: Improve sanity checking of filesystem metadata (CVE-2012-3400)
+ udf: Avoid run away loop when partition table length is corrupted
+ udf: Fortify loading of sparing table
Debian package: linux (3.2.23-1), actual changelog
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.22
==============================================================
So Douglas, it might handle your issue better now.
I have found a similar mount 100% kernel mode CPU usage issue when
attempting to mount an invalid iso9660 filesystem that I am looking into
now.
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