exfat: fix incorrect update of stream entry in __exfat_truncate()

At truncate, there is a problem of incorrect updating in the file entry
pointer instead of stream entry. This will cause the problem of
overwriting the time field of the file entry to new_size. Fix it to
update stream entry.

Fixes: 98d917047e8b ("exfat: add file operations")
Cc: stable@vger.kernel.org # v5.7
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>

diff --git a/fs/exfat/file.c b/fs/exfat/file.c
index 8e3f0eef45d77345e6f57ef58f3e86c51c69e905..fce03f31878735e1fa389231abc1052f24447146 100644 (file)
--- a/fs/exfat/file.c
+++ b/fs/exfat/file.c
@@ -171,11 +171,11 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
 
                /* File size should be zero if there is no cluster allocated */
                if (ei->start_clu == EXFAT_EOF_CLUSTER) {
-                       ep->dentry.stream.valid_size = 0;
-                       ep->dentry.stream.size = 0;
+                       ep2->dentry.stream.valid_size = 0;
+                       ep2->dentry.stream.size = 0;
                } else {
-                       ep->dentry.stream.valid_size = cpu_to_le64(new_size);
-                       ep->dentry.stream.size = ep->dentry.stream.valid_size;
+                       ep2->dentry.stream.valid_size = cpu_to_le64(new_size);
+                       ep2->dentry.stream.size = ep->dentry.stream.valid_size;
                }
 
                if (new_size == 0) {