[PATCH] builtin: submodule--helper: Add allocation check of module_cb structure objects may be helpful in case of allocation failure

[Li kunyu <kunyu@xxxxxxxxxxxx>]

The purpose of using temp is unknown, but adding an allocation failure
report should be helpful.

Signed-off-by: Li kunyu <kunyu@xxxxxxxxxxxx>
---
 builtin/submodule--helper.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index b63f420ece..2e379623ea 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -1077,6 +1077,9 @@ static void submodule_summary_callback(struct diff_queue_struct *q,
 		if (!S_ISGITLINK(p->one->mode) && !S_ISGITLINK(p->two->mode))
 			continue;
 		temp = (struct module_cb*)malloc(sizeof(struct module_cb));
+		if (!temp)
+			 BUG("The module_cb structure object fails to be allocated and the program may terminate abnormally");
+
 		temp->mod_src = p->one->mode;
 		temp->mod_dst = p->two->mode;
 		temp->oid_src = p->one->oid;
-- 
2.18.2