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SubjectRe: NULL dereference OOPS on SysRq-w
On Mon, Apr 28, 2008 at 3:08 PM, Dave Young <hidave.darkstar@gmail.com> wrote:
> On Mon, Apr 28, 2008 at 3:01 PM, Dan Noe <dpn@isomerica.net> wrote:
> > Dave Young wrote:
> >
> > > [snip]
> > >
> > > I have a fix for the NULL pointer reference BUG, tested on my pc.
> > > ---
> > >
> > > "m" will be NULL if seq_printf & seq_puts is called from sched_debug_show
> > > Use SEQ_* macros to fix it
> > > Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
> > >
> >
> > There is actually already a patch out for this which simply hasn't made it
> > upstream yet - Mike Galbraith emailed me with it and it indeed fixes the
> > problem. I hadn't realized his email didn't go to lkml.. otherwise I would
> > have echoed that here to avoid wasting people's time. My apologies.
>
> Ok, thanks.
>
> While debuging this issue I found another BUG about sysrq,
>
> echo w >/proc/sys/kernel/sysrq
> My system hangs, there's no response from then on.

Strange, the bug can not be reproduced now. Now I only get the
expected result "Invalid argument".


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