diff: fix leaking orderfile option
The `orderfile` diff option is being assigned via `OPT_FILENAME()`, which assigns an allocated string to the variable. We never free it though, causing a memory leak. Change the type of the string to `char *` and free it to plug the leak. This also requires us to use `xstrdup()` to assign the global config to it in case it is set. This leak is being hit in t7621, but plugging it alone does not make the test suite pass. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Patrick Steinhardt committed
Sep 26, 2024 at 13:46 UTC
76c7e708bbd6b19856d1ffa58f720e8da0c9eb0f
3 files changed
+7
-5
combine-diff.c
+1
-2
index 829a44e416..f6b624dc28 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -1393,9 +1393,8 @@ static struct combine_diff_path *find_paths_generic(const struct object_id *oid,
{
struct combine_diff_path *paths = NULL;
int i, num_parent = parents->nr;
-
int output_format = opt->output_format;
- const char *orderfile = opt->orderfile;
+ char *orderfile = opt->orderfile;
opt->output_format = DIFF_FORMAT_NO_OUTPUT;
/* tell diff_tree to emit paths in sorted (=tree) order */
diff.c
+5
-2
index 472479eb10..6555b8a32c 100644
--- a/diff.c
+++ b/diff.c
@@ -441,8 +441,10 @@ int git_diff_ui_config(const char *var, const char *value,
}
if (!strcmp(var, "diff.wordregex"))
return git_config_string(&diff_word_regex_cfg, var, value);
- if (!strcmp(var, "diff.orderfile"))
+ if (!strcmp(var, "diff.orderfile")) {
+ FREE_AND_NULL(diff_order_file_cfg);
return git_config_pathname(&diff_order_file_cfg, var, value);
+ }
if (!strcmp(var, "diff.ignoresubmodules")) {
if (!value)
@@ -4775,7 +4777,7 @@ void repo_diff_setup(struct repository *r, struct diff_options *options)
if (diff_indent_heuristic)
DIFF_XDL_SET(options, INDENT_HEURISTIC);
- options->orderfile = diff_order_file_cfg;
+ options->orderfile = xstrdup_or_null(diff_order_file_cfg);
if (!options->flags.ignore_submodule_set)
options->flags.ignore_untracked_in_submodules = 1;
@@ -6727,6 +6729,7 @@ void diff_free(struct diff_options *options)
FREE_AND_NULL(options->objfind);
}
+ FREE_AND_NULL(options->orderfile);
for (size_t i = 0; i < options->anchors_nr; i++)
free(options->anchors[i]);
FREE_AND_NULL(options->anchors);
diff.h
+1
-1
index 9901c8ca8c..b95d3c1e83 100644
--- a/diff.h
+++ b/diff.h
@@ -235,7 +235,7 @@ enum diff_submodule_format {
* diffcore library with.
*/
struct diff_options {
- const char *orderfile;
+ char *orderfile;
/*
* "--rotate-to=<file>" would start showing at <file> and when