linux-kernel - Re: [PATCH] [POWEPC] crashdump: do not fail on null pointer dereferencing

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Message-ID: <AANLkTinTprEzXRIFeJfu6TEvPqj24UBjrrZN3MtZD6LH@mail.gmail.com>
Date:	Tue, 11 May 2010 18:02:21 +0200
From:	Vitaly Wool <vitalywool@...il.com>
To:	Maxim Uvarov <muvarov@...il.com>
Cc:	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	uvarov@....rtsoft.ru
Subject: Re: [PATCH] [POWEPC] crashdump: do not fail on null pointer 
	dereferencing

Hi,

> diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
> index 6f4613d..341d8af 100644
> --- a/arch/powerpc/kernel/crash.c
> +++ b/arch/powerpc/kernel/crash.c
> @@ -375,6 +375,9 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
>        for_each_irq(i) {
>                struct irq_desc *desc = irq_to_desc(i);
>
> +               if (!desc || !desc->chip || !desc->chip->eoi)
> +                       continue;
> +

Kinda unlikely that desc can be NULL here :)

~Vitaly
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