Date: Sat, 07 Apr 2007 12:35:44 +0100 From: Tom Judge <tom@tomjudge.com> To: Kris Kennaway <kris@obsecurity.org> Cc: freebsd-stable@freebsd.org Subject: Re: Repeatable crash with mkdir causing a divide by zero error Message-ID: <46178210.9000809@tomjudge.com> In-Reply-To: <20070406184200.GA62383@xor.obsecurity.org> References: <46161B62.4070505@tomjudge.com> <20070406184200.GA62383@xor.obsecurity.org>
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Kris Kennaway wrote: > On Fri, Apr 06, 2007 at 11:05:22AM +0100, Tom Judge wrote: >> Hi, >> >> I have seen some problems with a new file system that I created >> yesterday in that I could repeatedly get the system to crash in with a >> mkdir. >> >> Here is the disk information >> mfid1: <MFI Logical Disk> on mfi1 >> mfid1: 5716992MB (11708399616 sectors) RAID volume 'Images' is optimal >> >> I created a new file system tuned for 64k blocks, an average file size >> of 1Mb, and 2500 files per directory. >> >> newfs -b 65535 -g 1048576 -h 2500 /dev/mfid1p1 >> mount /dev/mfid1p1 /compere >> mkdir /compere/images >> mkdir /compere/images/1999 >> >> (Also tested with mkdir test; mkdir test/1998) >> >> The system is and amd64 system running 6.2-RELEASE and the pmap.c patch. >> I have 3 cores cause by 3 different apps (rsync, gmkdir, mkdir) and >> can provide any more information if required. I have attached a back >> trace, unfortunatly I cannot do any testing as the system is now in >> testing (newfs -b 65535 -g 1048576 /dev/mfid1p1 was used and seems not >> to cause the bug). > > This might be simple to fix, but please file a PR if it does not get > picked up by someone on this list. > > Kris > <<SNIP>> For any one that is interested there is now a PR for this problem (kern/111352). Tom
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