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From: Martin Ågren <martin.agren@gmail.com>
To: "brian m. carlson" <sandals@crustytoothpaste.net>
Cc: Git Mailing List <git@vger.kernel.org>,
	Junio C Hamano <gitster@pobox.com>
Subject: Re: What's cooking in git.git (Jan 2019, #01; Mon, 7)
Date: Thu, 10 Jan 2019 20:03:54 +0100
Message-ID: <CAN0heSowybpM6BULwkjXVWSegGd0cM3LLfmXqGjj5qh3Ev9ArA@mail.gmail.com> (raw)
In-Reply-To: <20190110010238.GK423984@genre.crustytoothpaste.net>

On Thu, 10 Jan 2019 at 02:03, brian m. carlson
<sandals@crustytoothpaste.net> wrote:
>
> On Wed, Jan 09, 2019 at 10:06:08PM +0100, Martin Ågren wrote:
> > i.e., we copy sizeof(struct object_id) (=32) bytes. Which is 12 more
> > than what is known to be safe. For this particular input data, we read
> > outside allocated memory.
>
> Anything pointing to a struct object_id has to support at least
> GIT_MAX_RAWSZ bytes, and that code doesn't, because it's a tree buffer.
>
> I ran into this later on in my SHA-256 work and have a series that fixes
> the tree-walk code, but it's a bit involved and requires copying the
> struct object_id out of the buffer.
>
> I thought we were going to be triggering this case only with some new
> code I was introducing, but apparently somebody else got there first.

> As for my series, I'll need to run the testsuite on it, but I'll try to
> get it out tonight or at the latest tomorrow if people want to use that
> instead.

Cool. I should have known that you had something in the pipeline. Thanks
for working on this.

  parent reply index

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-07 23:34 Junio C Hamano
2019-01-08  9:50 ` tg/checkout-no-overlay, was " Thomas Gummerer
2019-01-08 17:51   ` Junio C Hamano
2019-01-08 17:30 ` ag/sequencer-reduce-rewriting-todo " Alban Gruin
2019-01-08 21:20 ` sb/more-repo-in-api, was " Jonathan Tan
2019-01-08 21:35   ` Junio C Hamano
2019-01-09 21:28     ` Stefan Beller
2019-01-09  7:37 ` Martin Ågren
2019-01-09 21:06   ` Martin Ågren
2019-01-10  1:02     ` brian m. carlson
2019-01-10 18:55       ` Junio C Hamano
2019-01-10 19:03       ` Martin Ågren [this message]
2019-01-10  4:25     ` [PATCH 0/5] tree-walk object_id refactor brian m. carlson
2019-01-10  4:25       ` [PATCH 1/5] tree-walk: copy object ID before use brian m. carlson
2019-01-10  4:25       ` [PATCH 2/5] match-trees: compute buffer offset correctly when splicing brian m. carlson
2019-01-10  4:25       ` [PATCH 3/5] match-trees: use hashcpy to splice trees brian m. carlson
2019-01-10  6:45         ` Jeff King
2019-01-10 23:55           ` brian m. carlson
2019-01-11 14:51             ` Jeff King
2019-01-11 14:54               ` Jeff King
2019-01-14  1:30                 ` brian m. carlson
2019-01-14 15:40                   ` Jeff King
2019-01-10  4:25       ` [PATCH 4/5] tree-walk: store object_id in a separate member brian m. carlson
2019-01-10  6:49         ` Jeff King
2019-01-10 23:57           ` brian m. carlson
2019-01-10  4:25       ` [PATCH 5/5] cache: make oidcpy always copy GIT_MAX_RAWSZ bytes brian m. carlson
2019-01-10  6:50         ` Jeff King
2019-01-10  6:40       ` [PATCH 0/5] tree-walk object_id refactor Jeff King
2019-01-11  0:17         ` brian m. carlson
2019-01-11 14:17           ` Jeff King
2019-01-15  0:39     ` [PATCH v2 " brian m. carlson
2019-01-15  0:39       ` [PATCH v2 1/5] tree-walk: copy object ID before use brian m. carlson
2019-01-15  0:39       ` [PATCH v2 2/5] match-trees: compute buffer offset correctly when splicing brian m. carlson
2019-01-15  0:39       ` [PATCH v2 3/5] match-trees: use hashcpy to splice trees brian m. carlson
2019-01-15  0:39       ` [PATCH v2 4/5] tree-walk: store object_id in a separate member brian m. carlson
2019-01-15  0:39       ` [PATCH v2 5/5] cache: make oidcpy always copy GIT_MAX_RAWSZ bytes brian m. carlson
2019-01-15 17:51       ` [PATCH v2 0/5] tree-walk object_id refactor Junio C Hamano
2019-01-09 10:28 ` What's cooking in git.git (Jan 2019, #01; Mon, 7) Jeff King
2019-01-10 19:05   ` Junio C Hamano
2019-01-10 19:46   ` Junio C Hamano
2019-01-10 18:02 ` Stefan Beller

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