"Richard B. Johnson" <root@chaos.analogic.com> wrote:
>
> On Tue, 11 Feb 2003, Andrew Morton wrote:
>
> > "Richard B. Johnson" <root@chaos.analogic.com> wrote:
> > >
> > > Linux version 2.4.18, after it runs for a few days, will panic
> > > if I do `cat /proc/ioports`. Has this been reported/fixed in
> > > later versions?
> > >
> > > : Unable to handle kernel paging request at virtual address d48e2fa0
> >
> > This means that some driver which was previously loaded forgot to do a
> > release_region(). Later, the /proc code tries to read stuff from within the
> > driver which isn't there any more and oopses.
> >
>
> Yes. I just noticed that most network board drivers in version 2.4.18
> do not execute release_region() after they have done a request_region(),
> if they fail to install because of some error.
Fairly common error.
> The error in this case was
> the failure to allocate memory because I told the kernel I only had 4
> megabytes (exprimental ioremap() of the rest in another module).
>
> Is somebody fixing these drivers (do you know).
There is ongoing janitorial work, and things are getting better.
But I'm not aware of anyone specifically auditing for missing
release_region()s. And given that it is a box-killer rather than
just a memory leak, yes, it is worth an audit.
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This archive was generated by hypermail 2b29 : Sat Feb 15 2003 - 22:00:43 EST