Date: Wed, 15 Sep 2004 11:27:27 -0400 (EDT) From: Robert Watson <rwatson@FreeBSD.org> To: current@FreeBSD.org Cc: jhb@FreeBSD.org Subject: Re: Possible NULL pointer deref in sched_add() via maybe_preempt() and kse_release() Message-ID: <Pine.NEB.3.96L.1040915111155.89730B-100000@fledge.watson.org> In-Reply-To: <Pine.NEB.3.96L.1040915105648.89730A-100000@fledge.watson.org>
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On Wed, 15 Sep 2004, Robert Watson wrote: > The source code here is probably about a day old; the panic occurred > during a kernel build using an NFS-mounted source tree and local object > tree. MySQL should have been basically idle, since no clients were > active or had been active recently, but no doubt it wakes up once in a > while to do something. Just to follow up now the disks have fsck'd. The kernel source was fairly up-to-date with regards to recent threading and scheduling changes. The file revisions of interest appear to be: File My Revision CVS Revision sched_4bsd.c 1.64 1.64 *kern_switch.c 1.91 1.92 (but only change is a ULE change?) kern_kse.c 1.200 1.200 kern_thread.c 1.196 1.196 kern_intr.c 1.115 1.115 I was able to get a core dump, but in the new world order I can no longer use NIS, so it will take me a few minutes to get something useful out of it. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Principal Research Scientist, McAfee Research
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