From: Liao Yuanhong <liaoyuanhong@vivo.com>
Date: Mon, 11 Aug 2025 12:58:16 +0000 (+0800)
Subject: ext4: use kmalloc_array() for array space allocation
X-Git-Tag: v6.12.44~290
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e767e51caef389c60054b0cf43e968090d1c3ebc;p=thirdparty%2Fkernel%2Fstable.git

ext4: use kmalloc_array() for array space allocation

commit 76dba1fe277f6befd6ef650e1946f626c547387a upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/ext4/orphan.c b/fs/ext4/orphan.c
index e5b47dda33175..a23b0c01f8096 100644
--- a/fs/ext4/orphan.c
+++ b/fs/ext4/orphan.c
@@ -590,8 +590,9 @@ 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;