Messages in this thread Patch in this message | | | From | Sungjong Seo <> | Subject | [PATCH] exfat: redefine DIR_DELETED as the bad cluster number | Date | Thu, 29 Dec 2022 20:52:38 +0900 |
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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")
Reported-by: Yuezhang Mo <Yuezhang.Mo@sony.com> Signed-off-by: Sungjong Seo <sj1557.seo@samsung.com> --- fs/exfat/exfat_fs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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 -- 2.25.1
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