Hi Mosta, Thanks for the prompt reply, I added the same printk message in the other kernel files like here /usr/src/linux-2.6.33.3/init/calibrate.c int lps_precision = LPS_PREC; printk("*** Just testing prinkt to work ***\n"); static bool printed; and recompiled the kernel and its showing in the dmesg. Is this means kernel logger is fine? also can please verify the steps i made to make lsm module just for pirnkt message. Regards On Fri, May 20, 2011 at 1:56 PM, mosta <mosta.me@googlemail.com> wrote:

you have to check at what level you're kernel logger is and set it to the according level.

greetings mosta

On 05/20/11 06:29, toqeer ali wrote:

...

Hi All,

I am writing a skeleton LSM module to only print the message at boot time, but I could not see any printk message in the dmesg.

Below are steps i did to enable the printk messages in the LSM module.

What i did is download linux kernel 2.6.33.3.

1) added the line source security/lsmcustommod/Kconfig in linuxsrc/security/Kconfig near ima/Kconfig. 2) added "subdir-$(CONFIG_SECURITY_LSMCUSTOMMOD) += lsmcustommod" line at linuxsrc/security/Makefile 3) created a directory in linuxsrc/security/lsmcustommod and putted three files

i) lsmcustommod.c ii) Kconfig iii) Makefile

*Kconfig file contents*

config SECURITY_LSMCUSTOMMOD bool "LSMCUSTOMMOD Support" depends on SECURITY select NETWORK_SECMARK default n help

*Makefile Contents*

obj-$(CONFIG_SECURITY_LSMCUSTOMMOD) := lsmcustommod.o

*lsmcustommod.c* contents

static __init lsmcustommod_init(void){ /* register the hooks */

if (register_security(&lsmcustommod_ops)) panic("lsmcustommod: Unable to register lsmcustommod with kernel.\n"); else printk("lsmcustommod: registered with the kernel\n");

return 0; }

static void __exit lsmcustommod_exit (void) { return; }

module_init (lsmcustommod_init); module_exit (lsmcustommod_exit);

MODULE_DESCRIPTION("lsmcustommod"); MODULE_LICENSE("GPL"); #endif /* CONFIG_SECURITY_LSMCUSTOMMOD */

After that I also added some return 0 and printk statments in the lsmcustommod_ops stucture.

lastly disabled all modules in make menuconfig and select LSMCUTOMMOD in security sections of the menufile and compile the kernel by the following command.

make && make modules && make modules_install && make install updategrub2

-- Toqeer Ali Syed

Red Hat Certified Engineer

mob: +60166205504 <tel:%2B60166205504> mob: +92 321 9059916 <tel:%2B92%20321%209059916>

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-- Toqeer Ali Syed Red Hat Certified Engineer mob: +60166205504 mob: +92 321 9059916