From: Sungjong Seo sj1557.seo@samsung.com
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@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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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