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diff: fix leaking orderfile option

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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>
This commit is contained in:
Patrick Steinhardt 2024-09-26 13:46:29 +02:00 committed by Junio C Hamano
parent 49af1b7722
commit 76c7e708bb
3 changed files with 7 additions and 5 deletions
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3
combine-diff.c
View file

@ -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 */

7
diff.c
View file

@ -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);

2
diff.h
View file

@ -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