tree a60c763ab0cfc3a247f10ed36194d238b1e205bd
parent 34cf865d54813aab3497838132fb1bbd293f4054
author Theodore Ts'o <tytso@mit.edu> 1387549775 -0500
committer Theodore Ts'o <tytso@mit.edu> 1387549775 -0500

ext4: add explicit casts when masking cluster sizes

The missing casts can cause the high 64-bits of the physical blocks to
be lost.  Set up new macros which allows us to make sure the right
thing happen, even if at some point we end up supporting larger
logical block numbers.

Thanks to the Emese Revfy and the PaX security team for reporting this
issue.

Reported-by: PaX Team <pageexec@freemail.hu>
Reported-by: Emese Revfy <re.emese@gmail.com>                                 
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org