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[PATCH] submodule--helper: replace malloc with xmalloc

From
Siddharth Shrimali <r.siddharth.shrimali@gmail.com>
Date
Mar 10, 2026, 12:10 UTC
Message-ID
<20260310121013.39291-1-r.siddharth.shrimali@gmail.com>

The submodule_summary_callback() function currently uses a raw malloc() which could lead to NULL pointer dereference.

Standardize this by replacing malloc() with xmalloc() for error handling. Also, remove the unnecessary type cast and use sizeof(*temp) instead of struct name in xmalloc to improve maintainability of the code.

Signed-off-by: Siddharth Shrimali <r.siddharth.shrimali@gmail.com>
---
 builtin/submodule--helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 143f7cb3cc..f3e132888f 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -1160,7 +1160,7 @@ 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));
+		temp = xmalloc(sizeof(*temp));
 		temp->mod_src = p->one->mode;
 		temp->mod_dst = p->two->mode;
 		temp->oid_src = p->one->oid;
-- 
2.51.2
Next: Patrick Steinhardt
Message 1 of 5 in “submodule--helper: replace malloc with xmalloc”
  1. submodule--helper: replace malloc with xmallocSiddharth Shrimali, Mar 10, 2026
  2. Patrick SteinhardtMar 10, 2026
  3. Junio C HamanoMar 10, 2026
  4. submodule--helper: replace malloc with xmallocSiddharth Shrimali, Mar 10, 2026
  5. Junio C HamanoMar 10, 2026

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