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| author | Sungjong Seo <sj1557.seo@samsung.com> | 2022-12-29 20:52:38 +0900 |
|---|---|---|
| committer | Namjae Jeon <linkinjeon@kernel.org> | 2023-02-27 21:14:45 +0900 |
| commit | bdaadfd343e3cba49ad0b009ff4b148dad0fa404 (patch) | |
| tree | d61b1fbe8bac61e2630ddd2590c5fc80420fca96 /fs/exfat | |
| parent | 706fdcac002316893434d753be8cfb549fe1d40d (diff) | |
| download | linux-stable-bdaadfd343e3cba49ad0b009ff4b148dad0fa404.tar.gz | |
exfat: redefine DIR_DELETED as the bad cluster number
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@vger.kernel.org # v5.7+
Reported-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Signed-off-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Diffstat (limited to 'fs/exfat')
| -rw-r--r-- | fs/exfat/exfat_fs.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h index bc6d21d7c5ad..25a5df0fdfe0 100644 --- a/fs/exfat/exfat_fs.h +++ b/fs/exfat/exfat_fs.h @@ -50,7 +50,7 @@ enum { #define ES_IDX_LAST_FILENAME(name_len) \ (ES_IDX_FIRST_FILENAME + EXFAT_FILENAME_ENTRY_NUM(name_len) - 1) -#define DIR_DELETED 0xFFFF0321 +#define DIR_DELETED 0xFFFFFFF7 /* type values */ #define TYPE_UNUSED 0x0000 |