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submodule--helper: fix obscure leak in module_add()

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Fix an obscure leak in module_add(), if the "git add" command we were
piping to failed we'd fail to strbuf_release(&sb). This fixes a leak
introduced in a6226fd772 (submodule--helper: convert the bulk of
cmd_add() to C, 2021-08-10).

In fixing it move to a "goto cleanup" pattern, and since we need to
introduce a "ret" variable to do that let's also get rid of the
intermediate "exit_code" variable. The initialization to "-1" in
a6226fd772 has always been redundant, we'd only use the "exit_code"
value after assigning the return value of pipe_command() to it.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Reviewed-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2022-09-01 01:14:19 +02:00 committed by Junio C Hamano
parent 4c81ee9669
commit 4e83605d38
1 changed files with 11 additions and 11 deletions
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22
builtin/submodule--helper.c
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@ -3293,6 +3293,8 @@ static int module_add(int argc, const char **argv, const char *prefix)
N_("git submodule add [<options>] [--] <repository> [<path>]"),
NULL
};
struct strbuf sb = STRBUF_INIT;
int ret = 1;
argc = parse_options(argc, argv, prefix, options, usage, 0);
@ -3342,21 +3344,17 @@ static int module_add(int argc, const char **argv, const char *prefix)
die_on_repo_without_commits(add_data.sm_path);
if (!force) {
int exit_code = -1;
struct strbuf sb = STRBUF_INIT;
struct child_process cp = CHILD_PROCESS_INIT;
cp.git_cmd = 1;
cp.no_stdout = 1;
strvec_pushl(&cp.args, "add", "--dry-run", "--ignore-missing",
"--no-warn-embedded-repo", add_data.sm_path, NULL);
if ((exit_code = pipe_command(&cp, NULL, 0, NULL, 0, &sb, 0))) {
if ((ret = pipe_command(&cp, NULL, 0, NULL, 0, &sb, 0))) {
strbuf_complete_line(&sb);
fputs(sb.buf, stderr);
free(add_data.sm_path);
return exit_code;
goto cleanup;
}
strbuf_release(&sb);
}
if(!add_data.sm_name)
@ -3371,15 +3369,17 @@ static int module_add(int argc, const char **argv, const char *prefix)
add_data.progress = !!progress;
add_data.dissociate = !!dissociate;
if (add_submodule(&add_data)) {
free(add_data.sm_path);
return 1;
}
if (add_submodule(&add_data))
goto cleanup;
configure_added_submodule(&add_data);
ret = 0;
cleanup:
free(add_data.sm_path);
free(to_free);
strbuf_release(&sb);
return 0;
return ret;
}
#define SUPPORT_SUPER_PREFIX (1<<0)