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From: Junio C Hamano <gitster@pobox.com>
To: Jeff King <peff@peff.net>
Cc: git@vger.kernel.org
Subject: Re: [PATCH 6/6] config: reject parsing of files over INT_MAX
Date: Fri, 10 Apr 2020 15:04:31 -0700	[thread overview]
Message-ID: <xmqqzhbjgfps.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <20200410195007.GF1363756@coredump.intra.peff.net> (Jeff King's message of "Fri, 10 Apr 2020 15:50:07 -0400")

Jeff King <peff@peff.net> writes:

> So given the fact that these are insane cases which we have no need to
> support, the weird behavior from feeding the results to printf even if
> the code is careful, and the possibility of uncareful code introducing
> its own integer truncation issues, let's just declare INT_MAX as a limit
> for parsing config files.

Makes sense.

> +	if (c != EOF && ++cf->total_len > INT_MAX) {

Would this work correctly if size_t is uint?  Sure, as int-max would
fit within it.  And of course if size_t is wider than uint, there is
no problem in this comparison.

Thanks.

  reply	other threads:[~2020-04-10 22:04 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-10 19:42 [PATCH 0/6] better handling of gigantic config files Jeff King
2020-04-10 19:43 ` [PATCH 1/6] remote: drop auto-strlen behavior of make_branch() and make_rewrite() Jeff King
2020-04-10 21:44   ` Junio C Hamano
2020-04-10 19:44 ` [PATCH 2/6] parse_config_key(): return subsection len as size_t Jeff King
2020-04-10 19:44 ` [PATCH 3/6] config: drop useless length variable in write_pair() Jeff King
2020-04-10 21:51   ` Junio C Hamano
2020-04-10 19:46 ` [PATCH 4/6] git_config_parse_key(): return baselen as size_t Jeff King
2020-04-10 19:47 ` [PATCH 5/6] config: use size_t to store parsed variable baselen Jeff King
2020-04-10 19:50 ` [PATCH 6/6] config: reject parsing of files over INT_MAX Jeff King
2020-04-10 22:04   ` Junio C Hamano [this message]
2020-04-10 22:15     ` Jeff King
2020-04-13  0:47       ` Taylor Blau
2020-04-13 22:14         ` Junio C Hamano
2020-04-13  0:49 ` [PATCH 0/6] better handling of gigantic config files Taylor Blau
2020-04-13 17:20   ` Jeff King
2020-04-13 17:23     ` Taylor Blau

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