fs/ntfs3: Break dir enumeration if directory contents error

commit 302e9dca8428979c9c99f2dbb44dc1783f5011c3 upstream.

If we somehow attempt to read beyond the directory size, an error
is supposed to be returned.

However, in some cases, read requests do not stop and instead enter
into a loop.

To avoid this, we set the position in the directory to the end.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/ntfs3/dir.c b/fs/ntfs3/dir.c
index 5cf3d9decf646b1935517e8b564d807626e60e0f..45e556fd7c54fa61f2ea930895b6b3b96445a1f9 100644 (file)
--- a/fs/ntfs3/dir.c
+++ b/fs/ntfs3/dir.c
@@ -475,6 +475,7 @@ static int ntfs_readdir(struct file *file, struct dir_context *ctx)
                vbo = (u64)bit << index_bits;
                if (vbo >= i_size) {
                        ntfs_inode_err(dir, "Looks like your dir is corrupt");
+                       ctx->pos = eod;
                        err = -EINVAL;
                        goto out;
                }