Re: [PATCH] BSD Secure Levels LSM

From: Chris Wright (chrisw@private)
Date: Tue Nov 25 2003 - 16:21:26 PST

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* Seth Arnold (sarnold@private) wrote:
> On Tue, Nov 25, 2003 at 02:38:05PM -0600, Michael A. Halcrow wrote:
> > On my Debian box (2.6.0-test9 kernel, sysklogd version 1.4.1),
> > duplicate messages are written to the logs as ``last message repeated
> > 5 times''.  
> 
> I believe this is a layer added by syslogd or klogd in userspace, rather
> than at the kernel level. If your kernel module spews enough data
> through kprint(), you will overflow the dmesg buffer, and the resulting
> corruption will likely make syslogd/klogd flood mitigation fail that
> much faster.

Indeed.  Or simply fill the dmesg buffer and cause it to lose other
important info.

thanks,
-chris
-- 
Linux Security Modules     http://lsm.immunix.org     http://lsm.bkbits.net

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