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From: Damien Robert <damien.olivier.robert@gmail.com>
To: Jeff King <peff@peff.net>,
	git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
	Derrick Stolee <dstolee@microsoft.com>,
	William Baker <William.Baker@microsoft.com>
Subject: Re: [PATCH v2 1/1] midx.c: fix an integer overflow
Date: Thu, 12 Mar 2020 19:24:46 +0100
Message-ID: <20200312182446.6zqjtudkptsvr6uh@feanor> (raw)
In-Reply-To: <20200312173520.2401776-1-damien.olivier.robert+git@gmail.com>

From Damien Robert, Thu 12 Mar 2020 at 18:35:20 (+0100) :
> When verifying a midx index with 0 objects, the
>     m->num_objects - 1
> overflows to 4294967295.
> 
> Fix this both by checking that the midx contains at least one oid,
> and also that we don't write any midx when there is no packfiles.

I forgot to add: previously I was wondering about a warning when in 'write'
when we only index one pack file, but this could make sense in the case of
a 'midx repack'. So I only warn if there is no objects.

  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-28 16:24 [PATCH " Damien Robert
2020-02-28 18:55 ` Jeff King
2020-02-28 20:39   ` Junio C Hamano
2020-02-29 17:15     ` Damien Robert
2020-02-29 15:38   ` Damien Robert
2020-03-12 17:35 ` [PATCH v2 " Damien Robert
2020-03-12 18:24   ` Damien Robert [this message]
2020-03-12 18:28   ` Derrick Stolee
2020-03-12 21:41     ` Damien Robert
2020-03-23 22:25   ` [PATCH v3 " Damien Robert
2020-03-24  6:01     ` Jeff King
2020-03-24 18:48       ` Junio C Hamano
2020-03-26 21:35   ` [PATCH v4 " Damien Robert
2020-03-26 23:27     ` Junio C Hamano
2020-03-28 22:23       ` Damien Robert
2020-03-28 23:51         ` Junio C Hamano
2020-03-28 22:18   ` [PATCH 1/1] midx.c: fix an integer underflow Damien Robert

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