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| author | Dan Rosenberg <dan.j.rosenberg@gmail.com> | 2010-06-24 12:07:47 +1000 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2010-06-24 12:07:47 +1000 |
| commit | 1817176a86352f65210139d4c794ad2d19fc6b63 (patch) | |
| tree | 59ccbcb634d87882fc899b0d21438c4bb86f8632 /fs/xfs/xfs_dir2_data.c | |
| parent | 7e27d6e778cd87b6f2415515d7127eba53fe5d02 (diff) | |
| download | lwn-1817176a86352f65210139d4c794ad2d19fc6b63.tar.gz lwn-1817176a86352f65210139d4c794ad2d19fc6b63.zip | |
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>
Diffstat (limited to 'fs/xfs/xfs_dir2_data.c')
0 files changed, 0 insertions, 0 deletions