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exec and bzip2

From: Samuel Thibault
Subject: exec and bzip2
Date: Tue, 31 Mar 2009 02:36:37 +0200
User-agent: Mutt/1.5.12-2006-07-14

Hello Roland,

You knew we'd be bitten by the bug someday, and that's today.  From

/* XXX all accesses of the mapped data need to use fault handling
   to abort the RPC when mapped file data generates bad page faults.
   I've marked some accesses with XXX/fault comments.
   --roland  */

And it happens that we do get faults when trying to bunzip2 the binary,
i.e. from the zipread() function.  So what's the plan?  If the offset is
really bogus, I guess we could use a safe version of memcpy and
longjmp(ziperr) when things go wrong?

For now I have disabled gzip/bzip2 support from the exec used by the
Debian hurd-i386 buildd.


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