linux-kernel - Re: kmemleak panic

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Message-ID: <a2e474ec-51f4-c006-b64a-8851d852621d@arm.com>
Date:   Fri, 18 Jan 2019 19:12:25 +0000
From:   Robin Murphy <robin.murphy@....com>
To:     Marc Gonzalez <marc.w.gonzalez@...e.fr>,
        Catalin Marinas <catalin.marinas@....com>
Cc:     Mark Rutland <mark.rutland@....com>, Arnd Bergmann <arnd@...db.de>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Oscar Salvador <osalvador@...e.de>,
        Wei Yang <richard.weiyang@...il.com>,
        Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Sri Krishna chowdary <schowdary@...dia.com>,
        Qian Cai <cai@....pw>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: kmemleak panic

On 2019-01-18 3:36 pm, Marc Gonzalez wrote:
> Unable to handle kernel paging request at virtual address ffffffc021e00000

I can't help but notice that you seem to get the same address in 4 
different logs - if it really is that deterministic then that's quite 
the boon for debugging (FWIW my first thought is that it looks a lot 
like a phys_to_virt() of something bogus). I've never used kmemleak 
myself, but looking at where it's crashing it appears to think that that 
address is a valid object - if I'm reading the docs correctly then I 
guess the "dump" command ought to be able to tell you where it thinks 
that object came from.

Robin.