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From: Jeff King <peff@peff.net>
To: git@vger.kernel.org
Cc: Junio C Hamano <gitster@pobox.com>,
	Eric Sunshine <sunshine@sunshineco.com>
Subject: [PATCH v2 2/7] submodule--helper: use strbuf_release() to free strbufs
Date: Mon, 17 Aug 2020 17:33:04 -0400	[thread overview]
Message-ID: <20200817213304.GB1854722@coredump.intra.peff.net> (raw)
In-Reply-To: <20200817213228.GA1854603@coredump.intra.peff.net>

The prepare_to_clone_next_submodule() function has a few local-variable
strbufs. We use strbuf_reset() throughout the function to reuse the
buffers over and over. But at the end of the function we also use
strbuf_reset() as they go out of scope, which means we end up leaking
their heap buffers. This should be strbuf_release() instead.

These were introduced by 48308681b0 (git submodule update: have a
dedicated helper for cloning, 2016-02-29), but it doesn't seem to have
the same mistake elsewhere. Likewise, I looked for other instances of
the pattern in the submodule--helper file but couldn't find any.

Signed-off-by: Jeff King <peff@peff.net>
---
 builtin/submodule--helper.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index df135abbf1..1762458345 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -1747,8 +1747,8 @@ static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
 					      "--no-single-branch");
 
 cleanup:
-	strbuf_reset(&displaypath_sb);
-	strbuf_reset(&sb);
+	strbuf_release(&displaypath_sb);
+	strbuf_release(&sb);
 	if (need_free_url)
 		free((void*)url);
 
-- 
2.28.0.605.g35fde94f44


  parent reply	other threads:[~2020-08-17 21:33 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-14 16:13 [PATCH 0/6] more small leak fixes Jeff King
2020-08-14 16:14 ` [PATCH 1/6] submodule--helper: use strbuf_release() to free strbufs Jeff King
2020-08-14 16:14 ` [PATCH 2/6] checkout: fix leak of non-existent branch names Jeff King
2020-08-14 16:17 ` [PATCH 3/6] config: fix leaks from git_config_get_string_const() Jeff King
2020-08-14 16:19 ` [PATCH 4/6] config: drop git_config_get_string_const() Jeff King
2020-08-14 20:21   ` Junio C Hamano
2020-08-15  6:34     ` Jeff King
2020-08-17 17:36       ` Junio C Hamano
2020-08-14 16:19 ` [PATCH 5/6] config: fix leak in git_config_get_expiry_in_days() Jeff King
2020-08-14 16:20 ` [PATCH 6/6] submodule--helper: fix leak of core.worktree value Jeff King
2020-08-14 16:25 ` [PATCH 0/6] more small leak fixes Jeff King
2020-08-14 16:27   ` Jeff King
2020-08-17 21:32 ` [PATCH v2 0/7] " Jeff King
2020-08-17 21:33   ` [PATCH v2 1/7] clear_pattern_list(): clear embedded hashmaps Jeff King
2020-08-17 21:33   ` Jeff King [this message]
2020-08-17 21:33   ` [PATCH v2 3/7] checkout: fix leak of non-existent branch names Jeff King
2020-08-17 21:33   ` [PATCH v2 4/7] config: fix leaks from git_config_get_string_const() Jeff King
2020-08-17 21:33   ` [PATCH v2 5/7] config: drop git_config_get_string_const() Jeff King
2020-08-17 21:33   ` [PATCH v2 6/7] config: fix leak in git_config_get_expiry_in_days() Jeff King
2020-08-17 21:33   ` [PATCH v2 7/7] submodule--helper: fix leak of core.worktree value Jeff King

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