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From: Junio C Hamano <gitster@pobox.com>
To: "Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
Cc: git@vger.kernel.org, Elijah Newren <newren@gmail.com>,
	Taylor Blau <me@ttaylorr.com>,
	Johannes Schindelin <johannes.schindelin@gmx.de>
Subject: Re: [PATCH v5 2/2] merge-ort: return early when failing to write a blob
Date: Wed, 28 Sep 2022 08:53:24 -0700	[thread overview]
Message-ID: <xmqqleq3zea3.fsf@gitster.g> (raw)
In-Reply-To: <bfc71a2d8adfbf9b899a47d469fe2343e4703ff7.1664350162.git.gitgitgadget@gmail.com> (Johannes Schindelin via GitGitGadget's message of "Wed, 28 Sep 2022 07:29:22 +0000")

"Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
writes:

> This is _not_ just a cosmetic change: Even though one might assume that
> the operation would have failed anyway at the point when the new tree
> object is written (and the corresponding tree object _will_ be new if it
> contains a blob that is new), but that is not so: As pointed out by
> Elijah Newren, when Git has previously been allowed to add loose objects
> via `sudo` calls, it is very possible that the blob object cannot be
> written (because the corresponding `.git/objects/??/` directory may be
> owned by `root`) but the tree object can be written (because the
> corresponding objects directory is owned by the current user). This
> would result in a corrupt repository because it is missing the blob
> object, and with this here patch we prevent that.
>
> Note: This patch adjusts two variable declarations from `unsigned` to
> `int` because their purpose is to hold the return value of
> `handle_content_merge()`, which is of type `int`. The existing users of
> those variables are only interested whether that variable is zero or
> non-zero, therefore this type change does not affect the existing code.
>
> Reviewed-by: Elijah Newren <newren@gmail.com>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> ---

Thanks.  The first paragraph in the quoted part above is new and not
exactly "reviewed" by Elijah yet, so let's ask ;-)  

To me the description of the issue looks reasonable to me.  Any
comments, Elijah?

The code is the same as the one in the previous round and Elijah
gave his Reviewed-by, and does look good to me, too.

>  merge-ort.c | 28 +++++++++++++++++++---------
>  1 file changed, 19 insertions(+), 9 deletions(-)

Thanks, all.  Queued.


  reply	other threads:[~2022-09-28 15:53 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-21 15:30 [PATCH] merge-tree: fix segmentation fault in read-only repositories Johannes Schindelin via GitGitGadget
2022-09-21 15:42 ` Taylor Blau
2022-09-21 20:12   ` Johannes Schindelin
2022-09-21 18:12 ` Junio C Hamano
2022-09-21 20:13   ` Johannes Schindelin
2022-09-21 22:08 ` [PATCH v2] " Johannes Schindelin via GitGitGadget
2022-09-21 22:24   ` Junio C Hamano
2022-09-22 19:52     ` Johannes Schindelin
2022-09-21 22:56   ` Elijah Newren
2022-09-21 23:11     ` Junio C Hamano
2022-09-22 17:24     ` Johannes Schindelin
2022-09-22 19:50     ` Johannes Schindelin
2022-09-23  1:47       ` Elijah Newren
2022-09-22 19:46   ` [PATCH v3] merge-ort: " Johannes Schindelin via GitGitGadget
2022-09-23  1:38     ` Elijah Newren
2022-09-23  9:55       ` Johannes Schindelin
2022-09-26 21:55     ` [PATCH v4 0/2] merge-tree: " Johannes Schindelin via GitGitGadget
2022-09-26 21:55       ` [PATCH v4 1/2] merge-ort: " Johannes Schindelin via GitGitGadget
2022-09-26 21:55       ` [PATCH v4 2/2] merge-ort: return early when failing to write a blob Johannes Schindelin via GitGitGadget
2022-09-26 22:07         ` Junio C Hamano
2022-09-27  8:05         ` Elijah Newren
2022-09-27 16:45           ` Junio C Hamano
2022-09-27  8:11       ` [PATCH v4 0/2] merge-tree: fix segmentation fault in read-only repositories Elijah Newren
2022-09-28  7:29       ` [PATCH v5 " Johannes Schindelin via GitGitGadget
2022-09-28  7:29         ` [PATCH v5 1/2] merge-ort: " Johannes Schindelin via GitGitGadget
2022-09-28  7:29         ` [PATCH v5 2/2] merge-ort: return early when failing to write a blob Johannes Schindelin via GitGitGadget
2022-09-28 15:53           ` Junio C Hamano [this message]
2022-09-29  1:36             ` Elijah Newren
2022-09-29  1:49               ` Junio C Hamano

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