Re: klog under linux 2.6.0-test11

On Mon, Dec 08, 2003 at 01:17:52PM +0100, Gerrit Pape wrote:
>On Mon, Dec 08, 2003 at 11:05:26AM +0100, Lukas Beeler wrote:
>> This also happens for me. Iam using 2.6.0-test[8-11], without
>> further patches. No obscure security patches whatsoever applied.
>> I ``fixed'' the problem by running socklog-klog as root. Didn't
>> investigate it further, because i lacked time to do so.
>
>Indeed.  I found a machine running linux 2.6.0-test8:
> # uname -r
> 2.6.0-test8
> # ls -l /tmp/testfile 
> -r--------    1 root     root           49 Dec  8 11:48 /tmp/testfile
> # (su -c cat nobody) </tmp/testfile 
> foo bar
> #
>
>fine, but:
> # ls -l /proc/kmsg 
> -r--------    1 root     root            0 Nov 24 10:00 /proc/kmsg
> # (su -c cat nobody) </proc/kmsg 
> cat: -: Operation not permitted
> #
>
>with kernel 2.4:
> # uname -r 
> 2.4.22
> # (su -c cat nobody) </proc/kmsg 
>
>it works fine.
>
>I'm curious if this change to the proc file-system is intended.

I've not patched 2.6.0-test11, and tried many variations of the config
(including no security features)

The other odd thing is the permissions don't seem to matter....

-r--------    1 root     root            0 Dec  6 17:52 /proc/kmsg

I tried changing the ownership:

-r--------    1 log      root            0 Dec  6 17:53 /proc/kmsg

Even opening it up completely:

-r--r--r--    1 log      root            0 Dec  6 17:57 /proc/kmsg

same problem.

// George

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