kernel/module: Fix memleak in module_add_modinfo_attrs()

[ Upstream commit f6d061d617124abbd55396a3bc37b9bf7d33233c ]

In module_add_modinfo_attrs() if sysfs_create_file() fails
on the first iteration of the loop (so i = 0), we forget to
free the modinfo_attrs.

Fixes: bc6f2a757d52 ("kernel/module: Fix mem leak in module_add_modinfo_attrs")
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

kernel/module.c

@@ -1730,6 +1730,8 @@ static int module_add_modinfo_attrs(struct module *mod)
 error_out:
 	if (i > 0)
 		module_remove_modinfo_attrs(mod, --i);
+	else
+		kfree(mod->modinfo_attrs);
 	return error;
 }