Date: Sun, 11 Jul 2004 19:40:45 -0700 From: Kris Kennaway <kris@obsecurity.org> To: current@freeBSD.org, jhb@freeBSD.org Subject: page fault/panic: mi_switch: switch in a critical section Message-ID: <20040712024044.GA24706@xor.obsecurity.org>
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panic: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x104
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc058a8cf
stack pointer = 0x10:0xdcb34cc4
frame pointer = 0x10:0xdcb34cec
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
current process = 50 (schedcpu)
trap number = 12
panic: page fault
syncing disks, buffers remaining... panic: mi_switch: switch in a critical section
addr2line says the panic was in kern/sched_4bsd.c:327
/*
* The kse slptimes are not touched in wakeup
* because the thread may not HAVE a KSE.
*/
if (ke->ke_state == KES_ONRUNQ) {
awake = 1;
ke->ke_flags &= ~KEF_DIDRUN;
---> } else if ((ke->ke_state == KES_THREAD) &&
(TD_IS_RUNNING(ke->ke_thread))) {
awake = 1;
gdb -k got confused and couldn't make anything out of the backtrace.
Kris
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