git@vger.kernel.org list mirror (unofficial, one of many)
 help / color / mirror / code / Atom feed
From: "Nipunn Koorapati via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Eric Sunshine <sunshine@sunshineco.com>,
	Nipunn Koorapati <nipunn1313@gmail.com>,
	Nipunn Koorapati <nipunn@dropbox.com>
Subject: [PATCH v5 1/2] negative-refspec: fix segfault on : refspec
Date: Tue, 22 Dec 2020 03:58:16 +0000
Message-ID: <48c79dc3d84f55dec4cd2199cc4152e146bee0ba.1608609498.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.820.v5.git.1608609498.gitgitgadget@gmail.com>

From: Nipunn Koorapati <nipunn@dropbox.com>

The logic added to check for negative pathspec match by c0192df630
(refspec: add support for negative refspecs, 2020-09-30) looks at
refspec->src assuming it is never NULL, however when
remote.origin.push is set to ":", then refspec->src is NULL,
causing a segfault within strcmp.

Tell git to handle matching refspec by adding the needle to the
set of positively matched refspecs, since matching ":" refspecs
match anything as src.

Add test for matching refspec pushes fetch-negative-refspec
both individually and in combination with a negative refspec.

Signed-off-by: Nipunn Koorapati <nipunn@dropbox.com>
---
 remote.c                          | 10 ++++--
 t/t5582-fetch-negative-refspec.sh | 51 +++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+), 3 deletions(-)

diff --git a/remote.c b/remote.c
index 8be67f0892b..4f1a4099f1a 100644
--- a/remote.c
+++ b/remote.c
@@ -751,9 +751,13 @@ static int query_matches_negative_refspec(struct refspec *rs, struct refspec_ite
 
 			if (match_name_with_pattern(key, needle, value, &expn_name))
 				string_list_append_nodup(&reversed, expn_name);
-		} else {
-			if (!strcmp(needle, refspec->src))
-				string_list_append(&reversed, refspec->src);
+		} else if (refspec->matching) {
+			/* For the special matching refspec, any query should match */
+			string_list_append(&reversed, needle);
+		} else if (!refspec->src) {
+			BUG("refspec->src should not be null here");
+		} else if (!strcmp(needle, refspec->src)) {
+			string_list_append(&reversed, refspec->src);
 		}
 	}
 
diff --git a/t/t5582-fetch-negative-refspec.sh b/t/t5582-fetch-negative-refspec.sh
index 8c61e28fec8..2f3b064d0e7 100755
--- a/t/t5582-fetch-negative-refspec.sh
+++ b/t/t5582-fetch-negative-refspec.sh
@@ -186,4 +186,55 @@ test_expect_success "fetch --prune with negative refspec" '
 	)
 '
 
+test_expect_success "push with matching : and negative refspec" '
+	# Manually handle cleanup, since test_config is not
+	# prepared to take arbitrary options like --add
+	test_when_finished "test_unconfig -C two remote.one.push" &&
+
+	# For convenience, we use "master" to refer to the name of
+	# the branch created by default in the following.
+	#
+	# Repositories two and one have branches other than "master"
+	# but they have no overlap---"master" is the only one that
+	# is shared between them.  And the master branch at two is
+	# behind the master branch at one by one commit.
+	git -C two config --add remote.one.push : &&
+
+	# A matching push tries to update master, fails due to non-ff
+	test_must_fail git -C two push one &&
+
+	# "master" may actually not be "master"---find it out.
+	current=$(git symbolic-ref HEAD) &&
+
+	# If master is in negative refspec, then the command will not attempt
+	# to push and succeed.
+	git -C two config --add remote.one.push "^$current" &&
+
+	# With "master" excluded, this push is a no-op.  Nothing gets
+	# pushed and it succeeds.
+	git -C two push -v one
+'
+
+test_expect_success "push with matching +: and negative refspec" '
+	test_when_finished "test_unconfig -C two remote.one.push" &&
+
+	# The same set-up as above, whose side-effect was a no-op.
+	git -C two config --add remote.one.push +: &&
+
+	# The push refuses to update the "master" branch that is checked
+	# out in the "one" repository, even when it is forced with +:
+	test_must_fail git -C two push one &&
+
+	# "master" may actually not be "master"---find it out.
+	current=$(git symbolic-ref HEAD) &&
+
+	# If master is in negative refspec, then the command will not attempt
+	# to push and succeed
+	git -C two config --add remote.one.push "^$current" &&
+
+	# With "master" excluded, this push is a no-op.  Nothing gets
+	# pushed and it succeeds.
+	git -C two push -v one
+'
+
 test_done
-- 
gitgitgadget


  reply	other threads:[~2020-12-22  4:00 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-19 17:23 [PATCH] " Nipunn Koorapati via GitGitGadget
2020-12-19 18:05 ` Junio C Hamano
2021-02-19  9:28   ` Jacob Keller
2020-12-19 21:58 ` [PATCH v2 0/2] " Nipunn Koorapati via GitGitGadget
2020-12-19 21:58   ` [PATCH v2 1/2] " Nipunn Koorapati via GitGitGadget
2020-12-20  2:57     ` Eric Sunshine
2020-12-19 21:58   ` [PATCH v2 2/2] negative-refspec: improve comment on query_matches_negative_refspec Nipunn Koorapati via GitGitGadget
2020-12-21  2:05   ` [PATCH v3 0/3] negative-refspec: fix segfault on : refspec Nipunn Koorapati via GitGitGadget
2020-12-21  2:05     ` [PATCH v3 1/3] test-lib-functions: handle --add in test_config Nipunn Koorapati via GitGitGadget
2020-12-21  7:07       ` Eric Sunshine
2020-12-21 19:00         ` Junio C Hamano
2020-12-21 20:08           ` Eric Sunshine
2020-12-22  0:00             ` Nipunn Koorapati
2020-12-22  0:13               ` Eric Sunshine
2020-12-22  2:25                 ` Nipunn Koorapati
2020-12-22  5:19                   ` Eric Sunshine
2020-12-21  2:05     ` [PATCH v3 2/3] negative-refspec: fix segfault on : refspec Nipunn Koorapati via GitGitGadget
2020-12-21  7:20       ` Eric Sunshine
2020-12-21  2:05     ` [PATCH v3 3/3] negative-refspec: improve comment on query_matches_negative_refspec Nipunn Koorapati via GitGitGadget
2020-12-22  1:11     ` [PATCH v4 0/2] negative-refspec: fix segfault on : refspec Nipunn Koorapati via GitGitGadget
2020-12-22  1:11       ` [PATCH v4 1/2] " Nipunn Koorapati via GitGitGadget
2020-12-22  2:08         ` Junio C Hamano
2020-12-22  2:28           ` Junio C Hamano
2020-12-22  1:11       ` [PATCH v4 2/2] negative-refspec: improve comment on query_matches_negative_refspec Nipunn Koorapati via GitGitGadget
2020-12-22  3:58       ` [PATCH v5 0/2] negative-refspec: fix segfault on : refspec Nipunn Koorapati via GitGitGadget
2020-12-22  3:58         ` Nipunn Koorapati via GitGitGadget [this message]
2021-02-19  9:32           ` [PATCH v5 1/2] " Jacob Keller
2020-12-22  3:58         ` [PATCH v5 2/2] negative-refspec: improve comment on query_matches_negative_refspec Nipunn Koorapati via GitGitGadget
2020-12-22  6:48         ` [PATCH v5 0/2] negative-refspec: fix segfault on : refspec Junio C Hamano
2020-12-23 23:56           ` Nipunn Koorapati
2020-12-24  0:00             ` Junio C Hamano
2021-01-11 20:22               ` Nipunn Koorapati
2021-01-12  2:01                 ` Junio C Hamano

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: http://vger.kernel.org/majordomo-info.html

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=48c79dc3d84f55dec4cd2199cc4152e146bee0ba.1608609498.git.gitgitgadget@gmail.com \
    --to=gitgitgadget@gmail.com \
    --cc=git@vger.kernel.org \
    --cc=nipunn1313@gmail.com \
    --cc=nipunn@dropbox.com \
    --cc=sunshine@sunshineco.com \
    --subject='Re: [PATCH v5 1/2] negative-refspec: fix segfault on : refspec' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

git@vger.kernel.org list mirror (unofficial, one of many)

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://public-inbox.org/git
	git clone --mirror http://ou63pmih66umazou.onion/git
	git clone --mirror http://czquwvybam4bgbro.onion/git
	git clone --mirror http://hjrcffqmbrq6wope.onion/git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V1 git git/ https://public-inbox.org/git \
		git@vger.kernel.org
	public-inbox-index git

Example config snippet for mirrors.
Newsgroups are available over NNTP:
	nntp://news.public-inbox.org/inbox.comp.version-control.git
	nntp://ou63pmih66umazou.onion/inbox.comp.version-control.git
	nntp://czquwvybam4bgbro.onion/inbox.comp.version-control.git
	nntp://hjrcffqmbrq6wope.onion/inbox.comp.version-control.git
	nntp://news.gmane.io/gmane.comp.version-control.git
 note: .onion URLs require Tor: https://www.torproject.org/

code repositories for project(s) associated with this inbox:

	https://80x24.org/mirrors/git.git

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git