linux-kernel - Re: [git pull] coredump infoleak fix

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Message-ID: <20200528070552.GJ23230@ZenIV.linux.org.uk>
Date:   Thu, 28 May 2020 08:05:52 +0100
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [git pull] coredump infoleak fix

On Thu, May 28, 2020 at 09:02:55AM +0200, Ingo Molnar wrote:

> Looks good to me.
> 
> I'm wondering, shouldn't we also zero-initialize the dump data to 
> begin with? See the patch below (untested).

Note that this hides the bug from KASAN, though ;-)  And the bug
is not just infoleak - not all components are "all zeroes" in the
init state.