hppfs: hppfs_read_file() may return -ERROR

hppfs_read_file() may return (ssize_t) -ENOMEM, or -EFAULT.  When stored
in size_t 'count', these errors will not be noticed, a large value will be
added to *ppos.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index b278f7f52024ba556d32604ac61cab01e114f39b..a5089a6dd67a741b79279ffb435d94e2162f510e 100644 (file)
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -280,7 +280,12 @@ static ssize_t hppfs_read(struct file *file, char __user *buf, size_t count,
                               "errno = %d\n", err);
                        return err;
                }
-               count = hppfs_read_file(hppfs->host_fd, buf, count);
+               err = hppfs_read_file(hppfs->host_fd, buf, count);
+               if (err < 0) {
+                       printk(KERN_ERR "hppfs_read: read failed: %d\n", err);
+                       return err;
+               }
+               count = err;
                if (count > 0)
                        *ppos += count;
        }