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Full Discussion: simulating kernel panic
Top Forums UNIX for Dummies Questions & Answers simulating kernel panic Post 302402602 by pludi on Wednesday 10th of March 2010 08:05:19 AM
Old 03-10-2010
Create and load a minimal module calling the kernels panic() function, eg for Linux (from Linux Crash HOWTO)
Code:
$ cat > panic.c <<EOF
// ### panic.c ###########################

#define __KERNEL__
// # MODULE 

# include init_module(void)

int init_module (void)
{
    panic(" panic has been called");
    return 0;
}
EOF
$ cc -c -I/usr/src/linux/include panic.c
$ insmod panic.o

Note: there's a bug included here on purpose in case anyone wants to try this. The purpose is simply that one shouldn't copy and paste possibly dangerous code without thinking.

---------- Post updated at 14:05 ---------- Previous update was at 13:04 ----------

OK, I should have taken a look at the timestamp of that How-To. Here's a current version for modern kernels (again, with easy to spot bug, and lots of thanks to this page):
Code:
// panic.c
#include <linu/module.h>

static int __init panic_init_module(void) {
    panic(" panic has been called");
}

module_init(panic_init_module);
MODULE_LICENSE("GPL");

Code:
# Makefile
# Intendations have to be tabs, not spaces
UNAME := $(shell uname -r)
KERNEL26 := 2.6
KERNELVERSION := $(findstring $(KERNEL26),$(UNAME))

ifeq ($(KERNELVERSION),2.6)

obj-m := panic.o

INCLUDE := -I/usr/include/asm/
KDIR := /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)

all::
	$(MAKE) -C $(KDIR) $(INCLUDE) SUBDIRS=$(PWD) modules
 
else

TARGET := panic
INCLUDE := -I/lib/modules/`uname -r`/build/include -I/usr/include/asm/
CFLAGS := -O2 -Wall -DMODULE -D__KERNEL__ -DLINUX
CC := gcc

all:: ${TARGET}.o

${TARGET}.o: ${TARGET}.c
	$(CC) $(CFLAGS) ${INCLUDE} -c ${TARGET}.c
 
endif

Run it using
Code:
insmod ./panic.o # Kernel 2.4
insmod ./panic.ko # Kernel 2.6

 

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LEARN ABOUT CENTOS

findchip

FINDCHIP(8)															       FINDCHIP(8)

NAME

       findchip - checks the FIR chipset.

SYNOPSIS

       findchip [ -d dongle ] [ -v ] [ -l ] [ <chip1 .. chipN> ] [ -h ]

OPTIONS

       -d enables debug output

       -v be verbose

       -l lists supported chipsets

       -h prints help message

DESCRIPTION

       findchip checks the FIR chipset.

       findchip must be run as root or installed setuid root, as it requires root privileges.

EXAMPLES

       N.N.

DIAGNOSTICS

       N.N.

BUGS

       N.N.

SEE ALSO

       irattach(8), irdaping(8), irdadump(8), findchip(8), irpsion5(8), modprobe(8)

       Linux/IrDA  Project  http://irda.sourceforge.net -*- Linux/IrDA-Tutorial http://www.hpl.hp.com/personal/Jean_Tourrilhes/IrDA/index.html -*-
       Infrared-HOWTO http://tuxmobil.org/howtos.html -*- Infrared-Hardware-Survey http://tuxmobil.org/ir_misc.html

AUTHOR

       This manual page is written by Werner Heuser <wehe@tuxmobil.org>. It is based on the READMEs from irda-utils by the Linux/IrDA Project  and
       the Linux/IrDA-Tutorial.

COPYRIGHT

       Copyright (c) 2001 Werner Heuser

       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License (GFDL), Version
       1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, no  Front-Cover	Texts  and  no	Back-Cover
       Texts.

								   03 July 2006 						       FINDCHIP(8)
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