Date: Wed, 28 Apr 2004 17:01:58 -0700 From: Kris Kennaway <kris@obsecurity.org> To: John Uhlig <juhlig@parc.com> Cc: hackers@freebsd.org Subject: Re: kmem_malloc crashes running FreeBSD 5.2.1-RELEASE-p5 Message-ID: <20040429000158.GA61693@xor.obsecurity.org> In-Reply-To: <409024D6.7090800@parc.com> References: <409024D6.7090800@parc.com>
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--oyUTqETQ0mS9luUI Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Apr 28, 2004 at 02:40:38PM -0700, John Uhlig wrote: > Hi. >=20 > We are running FreeBSD 5.2.1-RELEASE-p5 with a fairly generic kernel on a > Dell PowerEdge 2650 with 1/2TB of disk RAID arrays. It recently crashed at > about 3AM while running the daily /etc/periodic/security/100.chksetuid=20 > script. >=20 > I am able to crash this system at will (takes about 5-10 minutes by=20 > running the > security scripts in a loop and using gtar to copy files to the server at= =20 > the same > time. I have included output from one core dump below. The other core dum= ps > I have so far are almost exactly the same e.g. "Error accessing memory=20 > address > 0xf8b7983c" is the same in all core dumps so far. >=20 > On the web, freebsd mailing lists and bug lists, I have seen existing=20 > thread about > "kmem_malloc and kmem_map too small" problems - but no evidence of a fix > or patch. We experienced the same problem running 4.9 but were able to=20 > fix it > by setting the MAXMEM option in our kernel conf file to a value 1GB less= =20 > than > actual physical memory size. This does not help with 5.2.1-RELEASE-p5. >=20 > My group is under pressure to bring 3 of these servers on-line for our us= er > community by the end of the month and would greatly appreciate any help > in resolving this problem. See PR 53416. You just need to tune your kernel resource allocation to deal with the large amount of memory your system has. Kris --oyUTqETQ0mS9luUI Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAkEX2Wry0BWjoQKURAoRYAJ47tYUJTpJXREpY5t8TZphwK7MgvACfVKOM +iH0o1aIlPsTFMkshfW3Z2k= =+b00 -----END PGP SIGNATURE----- --oyUTqETQ0mS9luUI--
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