ext4: use kmalloc_array() for array space allocation

Replace kmalloc(size * sizeof) with kmalloc_array() for safer memory
allocation and overflow prevention.

Cc: stable@kernel.org
Signed-off-by: Liao Yuanhong <liaoyuanhong@vivo.com>
Link: https://patch.msgid.link/20250811125816.570142-1-liaoyuanhong@vivo.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/fs/ext4/orphan.c b/fs/ext4/orphan.c
index 7c7f792ad6aba9194a08e67801e265bc443486bc..524d4658fa408d4259507c12c333a43d522c467d 100644 (file)
--- a/fs/ext4/orphan.c
+++ b/fs/ext4/orphan.c
@@ -589,8 +589,9 @@ int ext4_init_orphan_info(struct super_block *sb)
        }
        oi->of_blocks = inode->i_size >> sb->s_blocksize_bits;
        oi->of_csum_seed = EXT4_I(inode)->i_csum_seed;
-       oi->of_binfo = kmalloc(oi->of_blocks*sizeof(struct ext4_orphan_block),
-                              GFP_KERNEL);
+       oi->of_binfo = kmalloc_array(oi->of_blocks,
+                                    sizeof(struct ext4_orphan_block),
+                                    GFP_KERNEL);
        if (!oi->of_binfo) {
                ret = -ENOMEM;
                goto out_put;