[28/29] builtin/blame: fix leaking prefixed paths

Commit Message

Patrick Steinhardt June 3, 2024, 9:48 a.m. UTC

In `cmd_blame()` we compute prefixed paths by calling `add_prefix()`,
which itself calls `prefix_path()`. While `prefix_path()` returns an
allocated string, `add_prefix()` pretends to return a constant string.
Consequently, this path never gets freed.

Fix the return type to be `char *` and free the path to plug the memory
leak.

Signed-off-by: Patrick Steinhardt <[e-mail]>
---
 builtin/blame.c               | 5 +++--
 t/t6130-pathspec-noglob.sh    | 2 ++
 t/t7010-setup.sh              | 1 +
 t/t8003-blame-corner-cases.sh | 1 +
 t/t8008-blame-formats.sh      | 2 ++
 5 files changed, 9 insertions(+), 2 deletions(-)

Patch

diff --git a/builtin/blame.c b/builtin/blame.c
index e09ff0155a..17694410ed 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -687,7 +687,7 @@  static unsigned parse_score(const char *arg)
 	return score;
 }
 
-static const char *add_prefix(const char *prefix, const char *path)
+static char *add_prefix(const char *prefix, const char *path)
 {
 	return prefix_path(prefix, prefix ? strlen(prefix) : 0, path);
 }
@@ -865,7 +865,7 @@  static void build_ignorelist(struct blame_scoreboard *sb,
 int cmd_blame(int argc, const char **argv, const char *prefix)
 {
 	struct rev_info revs;
-	const char *path;
+	char *path = NULL;
 	struct blame_scoreboard sb;
 	struct blame_origin *o;
 	struct blame_entry *ent = NULL;
@@ -1226,6 +1226,7 @@  int cmd_blame(int argc, const char **argv, const char *prefix)
 	}
 
 cleanup:
+	free(path);
 	cleanup_scoreboard(&sb);
 	release_revisions(&revs);
 	return 0;
diff --git a/t/t6130-pathspec-noglob.sh b/t/t6130-pathspec-noglob.sh
index ba7902c9cd..82de25d549 100755
--- a/t/t6130-pathspec-noglob.sh
+++ b/t/t6130-pathspec-noglob.sh
@@ -1,6 +1,8 @@ 
 #!/bin/sh
 
 test_description='test globbing (and noglob) of pathspec limiting'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'create commits with glob characters' '
diff --git a/t/t7010-setup.sh b/t/t7010-setup.sh
index 520f96d09f..d9add2162e 100755
--- a/t/t7010-setup.sh
+++ b/t/t7010-setup.sh
@@ -2,6 +2,7 @@ 
 
 test_description='setup taking and sanitizing funny paths'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success setup '
diff --git a/t/t8003-blame-corner-cases.sh b/t/t8003-blame-corner-cases.sh
index 731265541a..6288352f57 100755
--- a/t/t8003-blame-corner-cases.sh
+++ b/t/t8003-blame-corner-cases.sh
@@ -4,6 +4,7 @@  test_description='git blame corner cases'
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 pick_fc='s/^[0-9a-f^]* *\([^ ]*\) *(\([^ ]*\) .*/\1-\2/'
diff --git a/t/t8008-blame-formats.sh b/t/t8008-blame-formats.sh
index ae4b579d24..fb5d225a67 100755
--- a/t/t8008-blame-formats.sh
+++ b/t/t8008-blame-formats.sh
@@ -1,6 +1,8 @@ 
 #!/bin/sh
 
 test_description='blame output in various formats on a simple case'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup' '