From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Date: Wed, 23 Nov 2022 16:48:46 +0800
Subject: [PATCH] fs/ntfs3: Add check for kmemdup
References: bsc#1012628
Patch-mainline: 6.3.2
Git-commit: e6c3cef24cb0d045f99d5cb039b344874e3cfd74

[ Upstream commit e6c3cef24cb0d045f99d5cb039b344874e3cfd74 ]

Since the kmemdup may return NULL pointer,
it should be better to add check for the return value
in order to avoid NULL pointer dereference.

Fixes: b46acd6a6a62 ("fs/ntfs3: Add NTFS journal")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/ntfs3/fslog.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/ntfs3/fslog.c b/fs/ntfs3/fslog.c
index c6eb371a..dc723f03 100644
--- a/fs/ntfs3/fslog.c
+++ b/fs/ntfs3/fslog.c
@@ -4256,6 +4256,10 @@ int log_replay(struct ntfs_inode *ni, bool *initialized)
 	rec_len -= t32;
 
 	attr_names = kmemdup(Add2Ptr(lrh, t32), rec_len, GFP_NOFS);
+	if (!attr_names) {
+		err = -ENOMEM;
+		goto out;
+	}
 
 	lcb_put(lcb);
 	lcb = NULL;
-- 
2.35.3