tree 82ff7d71973f259d8197bbc7c05461e978324c02
parent 5f3481e9a80c240f169b36ea886e2325b9aeb745
author Akira Fujita <a-fujita@rs.jp.nec.com> 1253125702 -0400
committer Theodore Ts'o <tytso@mit.edu> 1253125702 -0400

ext4: Fix wrong comparisons in mext_check_arguments()

The mext_check_arguments() function in move_extents.c has wrong
comparisons.  orig_start which is passed from user-space is block
unit, but i_size of inode is byte unit, therefore the checks do not
work fine.  This mis-check leads to the overflow of 'len' and then
hits BUG_ON() in ext4_move_extents().  The patch fixes this issue.

Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com>
Reviewed-by: Greg Freemyer <greg.freemyer@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>