buildroot/boot/grub2/0053-fs-zfs-Prevent-overflows-when-allocating-memory-for-.patch

From b39a42a7de6639c32829a5f4aff603190c69d689 Mon Sep 17 00:00:00 2001
From: Lidong Chen <lidong.chen@oracle.com>
Date: Wed, 22 Jan 2025 07:17:03 +0000
Subject: [PATCH] fs/zfs: Prevent overflows when allocating memory for arrays

Use grub_calloc() when allocating memory for arrays to ensure proper
overflow checks are in place.

Signed-off-by: Lidong Chen <lidong.chen@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Upstream: 7f38e32c7ebeaebb79e2c71e3c7d5ea367d3a39c
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
---
 grub-core/fs/zfs/zfs.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/grub-core/fs/zfs/zfs.c b/grub-core/fs/zfs/zfs.c
index 2f303d655..9ab7bf319 100644
--- a/grub-core/fs/zfs/zfs.c
+++ b/grub-core/fs/zfs/zfs.c
@@ -723,8 +723,8 @@ fill_vdev_info_real (struct grub_zfs_data *data,
 	{
 	  fill->n_children = nelm;
 
-	  fill->children = grub_zalloc (fill->n_children
-					* sizeof (fill->children[0]));
+	  fill->children = grub_calloc (fill->n_children,
+					sizeof (fill->children[0]));
 	}
 
       for (i = 0; i < nelm; i++)
@@ -3712,8 +3712,8 @@ zfs_mount (grub_device_t dev)
 #endif
 
   data->n_devices_allocated = 16;
-  data->devices_attached = grub_malloc (sizeof (data->devices_attached[0])
-					* data->n_devices_allocated);
+  data->devices_attached = grub_calloc (data->n_devices_allocated,
+					sizeof (data->devices_attached[0]));
   data->n_devices_attached = 0;
   err = scan_disk (dev, data, 1, &inserted);
   if (err)
-- 
2.50.1