| commit | 1817176a86352f65210139d4c794ad2d19fc6b63 | |
| author | Dan Rosenberg <dan.j.rosenberg@gmail.com> | |
| Thu, 24 Jun 2010 02:07:47 +0000 (24 12:07 +1000) | ||
| committer | Dave Chinner <david@fromorbit.com> | |
| Thu, 24 Jun 2010 02:07:47 +0000 (24 12:07 +1000) | ||
| tree | 59ccbcb634d87882fc899b0d21438c4bb86f8632 | treesnapshot (tar.gz zip) |
| parent | 7e27d6e778cd87b6f2415515d7127eba53fe5d02 | commitdiff |
xfs: prevent swapext from operating on write-only files
This patch prevents user "foo" from using the SWAPEXT ioctl to swap
a write-only file owned by user "bar" into a file owned by "foo" and
subsequently reading it. It does so by checking that the file
descriptors passed to the ioctl are also opened for reading.
Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This patch prevents user "foo" from using the SWAPEXT ioctl to swap
a write-only file owned by user "bar" into a file owned by "foo" and
subsequently reading it. It does so by checking that the file
descriptors passed to the ioctl are also opened for reading.
Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
| fs/xfs/xfs_dfrag.c | diffblobblamehistory |