linux-kernel - Re: [PATCH] fs/binfmt_elf.c: allocate initialized memory in fill_thread_core

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Message-ID: <CAG_fn=WaQnb9U+iOgsEPag_+mt0UEzFyhQBN0mkX2swAhuHTuA@mail.gmail.com>
Date:   Sun, 19 Apr 2020 12:10:52 +0200
From:   Alexander Potapenko <glider@...gle.com>
To:     Alexey Dobriyan <adobriyan@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, sunhaoyl@...look.com
Subject: Re: [PATCH] fs/binfmt_elf.c: allocate initialized memory in fill_thread_core_info()

On Sun, Apr 19, 2020 at 12:08 PM <glider@...gle.com> wrote:
>
> KMSAN reported uninitialized data being written to disk when dumping
> core. As a result, several kilobytes of kmalloc memory may be written to
> the core file and then read by a non-privileged user.
>
> Reported-by: sam <sunhaoyl@...look.com>
> Signed-off-by: Alexander Potapenko <glider@...gle.com>

Please also include the following tag:

Link: https://github.com/google/kmsan/issues/76