CVE request: kernel: btrfs

[Dan Rosenberg <dan.j.rosenberg () gmail com>]

Fixes for two issues in btrfs were committed upstream:

1.  The BTRFS_IOC_CLONE and BTRFS_IOC_CLONE_RANGE ioctls allowed a
local user to overwrite append-only files.

2.  The BTRFS_IOC_CLONE_RANGE ioctl was subject to an integer overflow
in specifying offsets to copy from a file, which potentially allows a
local user to read sensitive filesystem data.

Reference:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2ebc3464781ad24474abcbd2274e6254689853b5

-Dan