LSM skeleton module printk message not showing in dmesg

[toqeer83@gmail.com (toqeer ali)]

Hi Mosta,

I am using klogd and its running and also at boot time. I also search my
printk message in these files  /var/log/kern.log /var/log/boot,
/var/log/dmesg, /var/log/messages, but no luck, anything else i need to look
for?

Regards

On Fri, May 20, 2011 at 2:51 PM, mosta <mosta.me@googlemail.com> wrote:

> This depends on your kernel logger. Do you use klogd/ sysklogd or
> another one?
>
> On 05/20/11 08:40, toqeer ali wrote:
> > 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
> > <http://mosta.me>@googlemail.com <http://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> <tel:%2B60166205504>
> >     > mob:     +92 321 9059916 <tel:%2B92%20321%209059916>
> >     <tel:%2B92%20321%209059916>
> >     >
> >     >
> >     > _______________________________________________
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> >
> >
> >
> >
> > --
> > Toqeer Ali Syed
> >
> > Red Hat Certified Engineer
> >
> > mob:     +60166205504
> > mob:     +92 321 9059916
>
>


-- 
Toqeer Ali Syed

Red Hat Certified Engineer

mob:     +60166205504
mob:     +92 321 9059916
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