diff --git a/builtin/commit.c b/builtin/commit.c
index c7eda9bbb7..cd6cebcf8c 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1100,7 +1100,6 @@ static const char *find_author_by_nickname(const char *name)
 	struct rev_info revs;
 	struct commit *commit;
 	struct strbuf buf = STRBUF_INIT;
-	struct string_list mailmap = STRING_LIST_INIT_NODUP;
 	const char *av[20];
 	int ac = 0;
 
@@ -1111,7 +1110,8 @@ static const char *find_author_by_nickname(const char *name)
 	av[++ac] = buf.buf;
 	av[++ac] = NULL;
 	setup_revisions(ac, av, &revs, NULL);
-	revs.mailmap = &mailmap;
+	revs.mailmap = xmalloc(sizeof(struct string_list));
+	string_list_init_nodup(revs.mailmap);
 	read_mailmap(revs.mailmap);
 
 	if (prepare_revision_walk(&revs))
@@ -1122,7 +1122,6 @@ static const char *find_author_by_nickname(const char *name)
 		ctx.date_mode.type = DATE_NORMAL;
 		strbuf_release(&buf);
 		format_commit_message(commit, "%aN <%aE>", &buf, &ctx);
-		clear_mailmap(&mailmap);
 		release_revisions(&revs);
 		return strbuf_detach(&buf, NULL);
 	}
diff --git a/revision.c b/revision.c
index 553f7de825..622f0faecc 100644
--- a/revision.c
+++ b/revision.c
@@ -2926,10 +2926,19 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct s
 	return left;
 }
 
+static void release_revisions_mailmap(struct string_list *mailmap)
+{
+	if (!mailmap)
+		return;
+	clear_mailmap(mailmap);
+	free(mailmap);
+}
+
 void release_revisions(struct rev_info *revs)
 {
 	free_commit_list(revs->commits);
 	object_array_clear(&revs->pending);
+	release_revisions_mailmap(revs->mailmap);
 }
 
 static void add_child(struct rev_info *revs, struct commit *parent, struct commit *child)
diff --git a/t/t0056-git-C.sh b/t/t0056-git-C.sh
index 2630e756da..752aa8c945 100755
--- a/t/t0056-git-C.sh
+++ b/t/t0056-git-C.sh
@@ -2,6 +2,7 @@
 
 test_description='"-C <path>" option and its effects on other path-related options'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success '"git -C <path>" runs git from the directory <path>' '
diff --git a/t/t3302-notes-index-expensive.sh b/t/t3302-notes-index-expensive.sh
index bb5fea02a0..d0c4d38b4d 100755
--- a/t/t3302-notes-index-expensive.sh
+++ b/t/t3302-notes-index-expensive.sh
@@ -8,6 +8,7 @@ test_description='Test commit notes index (expensive!)'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 create_repo () {
diff --git a/t/t4055-diff-context.sh b/t/t4055-diff-context.sh
index 741e0803c1..73048d0a52 100755
--- a/t/t4055-diff-context.sh
+++ b/t/t4055-diff-context.sh
@@ -5,6 +5,7 @@
 
 test_description='diff.context configuration'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup' '
diff --git a/t/t4066-diff-emit-delay.sh b/t/t4066-diff-emit-delay.sh
index a1de63b77f..0ecb391541 100755
--- a/t/t4066-diff-emit-delay.sh
+++ b/t/t4066-diff-emit-delay.sh
@@ -4,6 +4,7 @@ test_description='test combined/stat/moved interaction'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 # This test covers a weird 3-way interaction between "--cc -p", which will run
diff --git a/t/t7008-filter-branch-null-sha1.sh b/t/t7008-filter-branch-null-sha1.sh
index 9ba9f24ad2..93fbc92b8d 100755
--- a/t/t7008-filter-branch-null-sha1.sh
+++ b/t/t7008-filter-branch-null-sha1.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
 
 test_description='filter-branch removal of trees with null sha1'
+
 . ./test-lib.sh
 
 test_expect_success 'setup: base commits' '