linux-ext4 - [PATCH] ext4: Use kmemdup() to replace kmalloc + memcpy

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Date:   Wed, 25 May 2022 11:01:20 +0800
From:   Shuqi Zhang <zhangshuqi3@...wei.com>
To:     <linux-ext4@...r.kernel.org>
CC:     <adilger.kernel@...ger.ca>, <tytso@....edu>,
        <zhangshuqi3@...wei.com>
Subject: [PATCH] ext4: Use kmemdup() to replace kmalloc + memcpy

Replace kmalloc + memcpy with kmemdup()

Signed-off-by: Shuqi Zhang <zhangshuqi3@...wei.com>
---
 fs/ext4/xattr.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 042325349098..564e28a1aa94 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1895,11 +1895,10 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
 
 			unlock_buffer(bs->bh);
 			ea_bdebug(bs->bh, "cloning");
-			s->base = kmalloc(bs->bh->b_size, GFP_NOFS);
+			s->base = kmemdup(BHDR(bs->bh), bs->bh->b_size, GFP_NOFS);
 			error = -ENOMEM;
 			if (s->base == NULL)
 				goto cleanup;
-			memcpy(s->base, BHDR(bs->bh), bs->bh->b_size);
 			s->first = ENTRY(header(s->base)+1);
 			header(s->base)->h_refcount = cpu_to_le32(1);
 			s->here = ENTRY(s->base + offset);
-- 
2.31.1