From: Jeff King <peff@peff.net>
To: "René Scharfe" <l.s.r@web.de>
Cc: Git List <git@vger.kernel.org>, Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH] fmt-merge-msg: avoid leaking strbuf in shortlog()
Date: Fri, 8 Dec 2017 16:11:38 -0500 [thread overview]
Message-ID: <20171208211137.GA7355@sigill.intra.peff.net> (raw)
In-Reply-To: <e1daa2b6-004b-ad66-b84d-84fa70a44baf@web.de>
On Fri, Dec 08, 2017 at 06:29:31PM +0100, René Scharfe wrote:
> Am 07.12.2017 um 22:27 schrieb Jeff King:
> > Grepping for "list_append.*detach" shows a few other possible cases in
> > transport-helper.c, which I think are leaks.
>
> -- >8 --
> Subject: [PATCH] transport-helper: plug strbuf and string_list leaks
>
> Transfer ownership of detached strbufs to string_lists of the
> duplicating variety by calling string_list_append_nodup() instead of
> string_list_append() to avoid duplicating and then leaking the buffer.
Thanks, this part looks obviously correct.
> While at it make sure to release the string_list when done;
> push_refs_with_export() already does that.
This one takes a bit more digging. I've been bitten before in Git's code
by freeing what appeared to be a leak only to find out that we had
passed the pointers off to some other data structure which expected them
to persist.
Here we feed them to set_helper_option(), which passes them to
quote_c_style(), which makes a copy into a strbuf. So I think all is
well.
-Peff
next prev parent reply other threads:[~2017-12-08 21:11 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-07 20:22 [PATCH] fmt-merge-msg: avoid leaking strbuf in shortlog() René Scharfe
2017-12-07 21:27 ` Jeff King
2017-12-08 17:29 ` René Scharfe
2017-12-08 18:44 ` Junio C Hamano
2017-12-08 20:10 ` René Scharfe
2017-12-08 21:11 ` Jeff King [this message]
2017-12-07 21:47 ` Junio C Hamano
2017-12-08 10:14 ` Jeff King
2017-12-08 17:29 ` René Scharfe
2017-12-08 18:37 ` Junio C Hamano
2017-12-08 21:28 ` Jeff King
2017-12-18 19:18 ` René Scharfe
2017-12-19 11:38 ` Jeff King
2017-12-19 18:26 ` René Scharfe
2017-12-20 13:05 ` Jeff King
2017-12-08 21:17 ` Jeff King
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