[PATCH v7 02/19] bundle.c: don't leak the "args" in the "struct child_process"

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Fix a leak that's been here since 7366096de9d (bundle API: change
"flags" to be "extra_index_pack_args", 2021-09-05). If we can't verify
the bundle, we didn't call child_process_clear() to clear the "args".

But rather than adding an additional child_process_clear() call, let's
verify the bundle before we start preparing the process we're going to
spawn. If we fail to verify, we don't need to push anything to the
child_process "args".

Helped-by: Elijah Newren <newren@xxxxxxxxx>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
 bundle.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/bundle.c b/bundle.c
index 4ef7256aa11..9ebb10a8f72 100644
--- a/bundle.c
+++ b/bundle.c
@@ -627,6 +627,10 @@ int unbundle(struct repository *r, struct bundle_header *header,
 	     enum verify_bundle_flags flags)
 {
 	struct child_process ip = CHILD_PROCESS_INIT;
+
+	if (verify_bundle(r, header, flags))
+		return -1;
+
 	strvec_pushl(&ip.args, "index-pack", "--fix-thin", "--stdin", NULL);
 
 	/* If there is a filter, then we need to create the promisor pack. */
@@ -638,8 +642,6 @@ int unbundle(struct repository *r, struct bundle_header *header,
 		strvec_clear(extra_index_pack_args);
 	}
 
-	if (verify_bundle(r, header, flags))
-		return -1;
 	ip.in = bundle_fd;
 	ip.no_stdout = 1;
 	ip.git_cmd = 1;
-- 
2.39.1.1425.gac85d95d48c




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