ulpatch: Fix segvfault

    $ ulpatch -p $(pidof hello) --patch patch-add-vars.ulp.no-build-id --lv=dbg -v
    11:20:59 [DEBUG][ehdr.c ehdr_magic_ok:20] Wrong ELF magic
    11:20:59 [ERROR][patch.c setup_load_info:370] Not found Build ID or .note.gnu.build-id section.
    Add gcc argument '-Wl,--build-id=sha1'
    or Add linker(ld) argument '--build-id=sha1'
    11:20:59 [DEBUG][ulpatch.c check_patch_file:147] Load patch-add-vars.ulp.no-build-id failed
    munmap_chunk(): invalid pointer
    Aborted (core dumped)

Signed-off-by: Rong Tao <[email protected]>

src/patch/patch.c

@@ -73,6 +73,7 @@ void release_load_info(struct load_info *info)
 		free(info->str_build_id);
 		info->str_build_id = NULL;
 	}
+
 	if (info->ulp_name) {
 		free(info->ulp_name);
 		info->ulp_name = NULL;
@@ -890,6 +891,7 @@ int init_patch(struct task_struct *task, const char *obj_file)
 
 	struct load_info info = {
 		.target_task = task,
+		.str_build_id = NULL,
 	};
 
 	if (!(task->fto_flag & FTO_PROC)) {

src/ulpatch.c

@@ -127,7 +127,7 @@ static int parse_config(int argc, char *argv[])
 int check_patch_file(const char *file)
 {
 	int err = 0;
-	struct load_info info;
+	struct load_info info = {0};
 
 	if (!file)
 		return -EEXIST;