exfat: fix setting uninitialized time to ctime/atime

An uninitialized time is set to ctime/atime in __exfat_write_inode().
It causes xfstests generic/003 and generic/192 to fail.

And since there will be a time gap between setting ctime/atime to
the inode and writing back the inode, so ctime/atime should not be
set again when writing back the inode.

Fixes: 4c72a36edd54 ("exfat: convert to new timestamp accessors")

Signed-off-by: Yuezhang Mo <[email protected]>
Reviewed-by: Andy Wu <[email protected]>
Reviewed-by: Aoyama Wataru <[email protected]>
Reviewed-by: Sungjong Seo <[email protected]>
Signed-off-by: Namjae Jeon <[email protected]>

inode.c

@@ -61,18 +61,18 @@ int __exfat_write_inode(struct inode *inode, int sync)
 			&ep->dentry.file.create_date,
 			&ep->dentry.file.create_time_cs);
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 7, 0)
+	ts = inode_get_mtime(inode);
 	exfat_set_entry_time(sbi, &ts,
 			     &ep->dentry.file.modify_tz,
 			     &ep->dentry.file.modify_time,
 			     &ep->dentry.file.modify_date,
 			     &ep->dentry.file.modify_time_cs);
-	inode_set_mtime_to_ts(inode, ts);
+	ts = inode_get_atime(inode);
 	exfat_set_entry_time(sbi, &ts,
 			     &ep->dentry.file.access_tz,
 			     &ep->dentry.file.access_time,
 			     &ep->dentry.file.access_date,
 			     NULL);
-	inode_set_atime_to_ts(inode, ts);
 #else
 	exfat_set_entry_time(sbi, &inode->i_mtime,
 			&ep->dentry.file.modify_tz,