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 mob: +92 321 9059916