Patch "fs/ntfs3: Add check for kmemdup" has been added to the 6.3-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    fs/ntfs3: Add check for kmemdup

to the 6.3-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     fs-ntfs3-add-check-for-kmemdup.patch
and it can be found in the queue-6.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 397d219d275e7b302a50dcf06faa672c19c25ed4
Author: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
Date:   Wed Nov 23 16:48:46 2022 +0800

    fs/ntfs3: Add check for kmemdup
    
    [ 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@xxxxxxxxxxx>
    Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/ntfs3/fslog.c b/fs/ntfs3/fslog.c
index c6eb371a36951..dc723f03d6bb2 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;