* LSM skeleton module printk message not showing in dmesg
@ 2011-05-20 4:29 toqeer ali
[not found] ` <4DD60281.7060605@googlemail.com>
0 siblings, 1 reply; 3+ messages in thread
From: toqeer ali @ 2011-05-20 4:29 UTC (permalink / raw)
To: kernelnewbies
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
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* LSM skeleton module printk message not showing in dmesg
[not found] ` <4DD60281.7060605@googlemail.com>
@ 2011-05-20 6:40 ` toqeer ali
[not found] ` <4DD60F89.4010204@googlemail.com>
0 siblings, 1 reply; 3+ messages in thread
From: toqeer ali @ 2011-05-20 6:40 UTC (permalink / raw)
To: kernelnewbies
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>
> >
> >
> > _______________________________________________
> > Kernelnewbies mailing list
> > Kernelnewbies at kernelnewbies.org
> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
--
Toqeer Ali Syed
Red Hat Certified Engineer
mob: +60166205504
mob: +92 321 9059916
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* LSM skeleton module printk message not showing in dmesg
[not found] ` <4DD60F89.4010204@googlemail.com>
@ 2011-05-20 7:40 ` toqeer ali
0 siblings, 0 replies; 3+ messages in thread
From: toqeer ali @ 2011-05-20 7:40 UTC (permalink / raw)
To: kernelnewbies
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>
> > >
> > >
> > > _______________________________________________
> > > Kernelnewbies mailing list
> > > Kernelnewbies at kernelnewbies.org
> > <mailto:Kernelnewbies@kernelnewbies.org>
> > > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> >
> >
> >
> >
> > --
> > 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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2011-05-20 4:29 LSM skeleton module printk message not showing in dmesg toqeer ali
[not found] ` <4DD60281.7060605@googlemail.com>
2011-05-20 6:40 ` toqeer ali
[not found] ` <4DD60F89.4010204@googlemail.com>
2011-05-20 7:40 ` toqeer ali
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