To prevent unexpectet values in the unused fields of the search key fail early. Otherwise future extensions would break the behavior of the search if current implementations in userspace set them to values other than zero.
Signed-off-by: Gerhard Heift <[email protected]> --- fs/btrfs/ioctl.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index be4c780..919d928 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1947,6 +1947,9 @@ static noinline int search_ioctl(struct inode *inode, if (buf_size < sizeof(struct btrfs_ioctl_search_header)) return -EOVERFLOW; + if (sk->unused || sk->unused1 | sk->unused2 | sk->unused3 | sk->unused4) + return -EINVAL; + path = btrfs_alloc_path(); if (!path) return -ENOMEM; -- 1.8.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
