Merge branch 'jk/decoration-and-other-leak-fixes' into maint-2.42

Leakfix.

* jk/decoration-and-other-leak-fixes:
  daemon: free listen_addr before returning
  revision: clear decoration structs during release_revisions()
  decorate: add clear_decoration() function

10 files changed, 74 insertions, 16 deletions

diff --git a/daemon.c b/daemon.c
index f5e597114b..17d331b2f3 100644
--- a/daemon.c
+++ b/daemon.c
@@ -1243,19 +1243,20 @@ static int serve(struct string_list *listen_addr, int listen_port,
 int cmd_main(int argc, const char **argv)
 {
 	int listen_port = 0;
-	struct string_list listen_addr = STRING_LIST_INIT_NODUP;
+	struct string_list listen_addr = STRING_LIST_INIT_DUP;
 	int serve_mode = 0, inetd_mode = 0;
 	const char *pid_file = NULL, *user_name = NULL, *group_name = NULL;
 	int detach = 0;
 	struct credentials *cred = NULL;
 	int i;
+	int ret;
 
 	for (i = 1; i < argc; i++) {
 		const char *arg = argv[i];
 		const char *v;
 
 		if (skip_prefix(arg, "--listen=", &v)) {
-			string_list_append(&listen_addr, xstrdup_tolower(v));
+			string_list_append_nodup(&listen_addr, xstrdup_tolower(v));
 			continue;
 		}
 		if (skip_prefix(arg, "--port=", &v)) {
@@ -1437,22 +1438,26 @@ int cmd_main(int argc, const char **argv)
 			die_errno("failed to redirect stderr to /dev/null");
 	}
 
-	if (inetd_mode || serve_mode)
-		return execute();
+	if (inetd_mode || serve_mode) {
+		ret = execute();
+	} else {
+		if (detach) {
+			if (daemonize())
+				die("--detach not supported on this platform");
+		}
 
-	if (detach) {
-		if (daemonize())
-			die("--detach not supported on this platform");
-	}
+		if (pid_file)
+			write_file(pid_file, "%"PRIuMAX, (uintmax_t) getpid());
 
-	if (pid_file)
-		write_file(pid_file, "%"PRIuMAX, (uintmax_t) getpid());
+		/* prepare argv for serving-processes */
+		strvec_push(&cld_argv, argv[0]); /* git-daemon */
+		strvec_push(&cld_argv, "--serve");
+		for (i = 1; i < argc; ++i)
+			strvec_push(&cld_argv, argv[i]);
 
-	/* prepare argv for serving-processes */
-	strvec_push(&cld_argv, argv[0]); /* git-daemon */
-	strvec_push(&cld_argv, "--serve");
-	for (i = 1; i < argc; ++i)
-		strvec_push(&cld_argv, argv[i]);
+		ret = serve(&listen_addr, listen_port, cred);
+	}
 
-	return serve(&listen_addr, listen_port, cred);
+	string_list_clear(&listen_addr, 0);
+	return ret;
 }
diff --git a/decorate.c b/decorate.c
index a5c43c0c14..69aeb142b4 100644
--- a/decorate.c
+++ b/decorate.c
@@ -81,3 +81,18 @@ void *lookup_decoration(struct decoration *n, const struct object *obj)
 			j = 0;
 	}
 }
+
+void clear_decoration(struct decoration *n, void (*free_cb)(void *))
+{
+	if (free_cb) {
+		unsigned int i;
+		for (i = 0; i < n->size; i++) {
+			void *d = n->entries[i].decoration;
+			if (d)
+				free_cb(d);
+		}
+	}
+
+	FREE_AND_NULL(n->entries);
+	n->size = n->nr = 0;
+}
diff --git a/decorate.h b/decorate.h
index ee43dee1f0..cdeb17c9df 100644
--- a/decorate.h
+++ b/decorate.h
@@ -58,4 +58,14 @@ void *add_decoration(struct decoration *n, const struct object *obj, void *decor
  */
 void *lookup_decoration(struct decoration *n, const struct object *obj);
 
+/*
+ * Clear all decoration entries, releasing any memory used by the structure.
+ * If free_cb is not NULL, it is called for every decoration value currently
+ * stored.
+ *
+ * After clearing, the decoration struct can be used again. The "name" field is
+ * retained.
+ */
+void clear_decoration(struct decoration *n, void (*free_cb)(void *));
+
 #endif
diff --git a/line-log.c b/line-log.c
index 790ab73212..24a1ecb677 100644
--- a/line-log.c
+++ b/line-log.c
@@ -1327,3 +1327,13 @@ int line_log_filter(struct rev_info *rev)
 
 	return 0;
 }
+
+static void free_void_line_log_data(void *data)
+{
+	free_line_log_data(data);
+}
+
+void line_log_free(struct rev_info *rev)
+{
+	clear_decoration(&rev->line_log_data, free_void_line_log_data);
+}
diff --git a/line-log.h b/line-log.h
index adff361b1b..4291da8d79 100644
--- a/line-log.h
+++ b/line-log.h
@@ -60,4 +60,6 @@ int line_log_process_ranges_arbitrary_commit(struct rev_info *rev,
 
 int line_log_print(struct rev_info *rev, struct commit *commit);
 
+void line_log_free(struct rev_info *rev);
+
 #endif /* LINE_LOG_H */
diff --git a/revision.c b/revision.c
index 2f4c53ea20..0ae1c76db3 100644
--- a/revision.c
+++ b/revision.c
@@ -3076,6 +3076,11 @@ static void release_revisions_mailmap(struct string_list *mailmap)
 
 static void release_revisions_topo_walk_info(struct topo_walk_info *info);
 
+static void free_void_commit_list(void *list)
+{
+	free_commit_list(list);
+}
+
 void release_revisions(struct rev_info *revs)
 {
 	free_commit_list(revs->commits);
@@ -3093,6 +3098,10 @@ void release_revisions(struct rev_info *revs)
 	diff_free(&revs->pruning);
 	reflog_walk_info_release(revs->reflog_info);
 	release_revisions_topo_walk_info(revs->topo_walk_info);
+	clear_decoration(&revs->children, free_void_commit_list);
+	clear_decoration(&revs->merge_simplification, free);
+	clear_decoration(&revs->treesame, free);
+	line_log_free(revs);
 }
 
 static void add_child(struct rev_info *revs, struct commit *parent, struct commit *child)
diff --git a/t/helper/test-example-decorate.c b/t/helper/test-example-decorate.c
index 2ed910adaa..8f59f6be4c 100644
--- a/t/helper/test-example-decorate.c
+++ b/t/helper/test-example-decorate.c
@@ -72,5 +72,7 @@ int cmd__example_decorate(int argc UNUSED, const char **argv UNUSED)
 	if (objects_noticed != 2)
 		BUG("should have 2 objects");
 
+	clear_decoration(&n, NULL);
+
 	return 0;
 }
diff --git a/t/t4217-log-limit.sh b/t/t4217-log-limit.sh
index 6e01e2629c..613f0710e9 100755
--- a/t/t4217-log-limit.sh
+++ b/t/t4217-log-limit.sh
@@ -2,6 +2,7 @@
 
 test_description='git log with filter options limiting the output'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup test' '
diff --git a/t/t5811-proto-disable-git.sh b/t/t5811-proto-disable-git.sh
index 8ac6b2a1d0..ed773e7432 100755
--- a/t/t5811-proto-disable-git.sh
+++ b/t/t5811-proto-disable-git.sh
@@ -1,6 +1,8 @@
 #!/bin/sh
 
 test_description='test disabling of git-over-tcp in clone/fetch'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 . "$TEST_DIRECTORY/lib-proto-disable.sh"
 . "$TEST_DIRECTORY/lib-git-daemon.sh"
diff --git a/t/t9004-example.sh b/t/t9004-example.sh
index 7e8894a4a7..590aab0304 100755
--- a/t/t9004-example.sh
+++ b/t/t9004-example.sh
@@ -1,6 +1,8 @@
 #!/bin/sh
 
 test_description='check that example code compiles and runs'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'decorate' '