This is a note to let you know that I've just added the patch titled
exfat: redefine DIR_DELETED as the bad cluster number
to the 6.1-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:
exfat-redefine-dir_deleted-as-the-bad-cluster-number.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bdaadfd343e3cba49ad0b009ff4b148dad0fa404 Mon Sep 17 00:00:00 2001
From: Sungjong Seo <sj1557.seo@xxxxxxxxxxx>
Date: Thu, 29 Dec 2022 20:52:38 +0900
Subject: exfat: redefine DIR_DELETED as the bad cluster number
From: Sungjong Seo <sj1557.seo@xxxxxxxxxxx>
commit bdaadfd343e3cba49ad0b009ff4b148dad0fa404 upstream.
When a file or a directory is deleted, the hint for the cluster of
its parent directory in its in-memory inode is set as DIR_DELETED.
Therefore, DIR_DELETED must be one of invalid cluster numbers. According
to the exFAT specification, a volume can have at most 2^32-11 clusters.
However, DIR_DELETED is wrongly defined as 0xFFFF0321, which could be
a valid cluster number. To fix it, let's redefine DIR_DELETED as
0xFFFFFFF7, the bad cluster number.
Fixes: 1acf1a564b60 ("exfat: add in-memory and on-disk structures and headers")
Cc: stable@xxxxxxxxxxxxxxx # v5.7+
Reported-by: Yuezhang Mo <Yuezhang.Mo@xxxxxxxx>
Signed-off-by: Sungjong Seo <sj1557.seo@xxxxxxxxxxx>
Signed-off-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/exfat/exfat_fs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/exfat/exfat_fs.h
+++ b/fs/exfat/exfat_fs.h
@@ -41,7 +41,7 @@ enum {
#define ES_2_ENTRIES 2
#define ES_ALL_ENTRIES 0
-#define DIR_DELETED 0xFFFF0321
+#define DIR_DELETED 0xFFFFFFF7
/* type values */
#define TYPE_UNUSED 0x0000
Patches currently in stable-queue which might be from sj1557.seo@xxxxxxxxxxx are
queue-6.1/exfat-fix-reporting-fs-error-when-reading-dir-beyond-eof.patch
queue-6.1/exfat-fix-unexpected-eof-while-reading-dir.patch
queue-6.1/exfat-redefine-dir_deleted-as-the-bad-cluster-number.patch
