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From: Alexander Potapenko <glider@google.com>
To: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	LKML <linux-kernel@vger.kernel.org>,
	sunhaoyl@outlook.com
Subject: Re: [PATCH] fs/binfmt_elf.c: allocate initialized memory in fill_thread_core_info()
Date: Tue, 21 Apr 2020 10:06:16 +0200
Message-ID: <CAG_fn=XBn-kKWdoPFhnfOGTXBaMfeziPQJCrgE7KvteSwYLmnA@mail.gmail.com> (raw)
In-Reply-To: <202004201540.01C8F82B@keescook>

> Ewww. That's been there for 12 years. Did something change in
> regset_size() or regset->get()? Do you know what leaves the hole?

I don't think anything changed on the kernel side recently.
But I've made some changes to DMA handling recently, which made uninit
writes to the disk discoverable.
We don't use core dumping on syzbot (because the auto-generated
programs crash all the time), so it could be a very old bug that was
triggered in a non-standard setup.

  parent reply index

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-19 10:08 glider
2020-04-19 10:10 ` Alexander Potapenko
2020-04-20 22:33 ` Andrew Morton
2020-04-20 22:41   ` Kees Cook
2020-04-21  3:42     ` Al Viro
2020-04-21  8:14       ` Alexander Potapenko
2020-05-12  1:09         ` Al Viro
2020-05-12  3:44           ` Al Viro
2020-05-12  8:20             ` Alexander Potapenko
2020-05-13  3:33               ` Al Viro
2020-05-24 23:45                 ` Al Viro
2020-05-26 22:38                   ` Al Viro
2020-05-27 12:08                     ` Alexander Potapenko
2020-05-27 19:04                     ` Borislav Petkov
2020-05-27 19:53                       ` Al Viro
2020-05-27 20:09                         ` Borislav Petkov
2020-04-21 12:54       ` Alexander Potapenko
2020-04-21 15:09         ` Jann Horn
2020-04-21 16:04           ` Yu-cheng Yu
2020-04-21 16:16             ` Jann Horn
2020-04-21 16:26               ` Yu-cheng Yu
2020-04-21 20:20               ` Kees Cook
2020-04-21  8:06     ` Alexander Potapenko [this message]
2020-05-27 21:55     ` Kees Cook
2020-04-21  8:00   ` Alexander Potapenko

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