summaryrefslogtreecommitdiffstats
path: root/fs/jbd2
diff options
context:
space:
mode:
authorAkira Fujita <a-fujita@rs.jp.nec.com>2009-12-07 05:38:31 +0100
committerTheodore Ts'o <tytso@mit.edu>2009-12-07 05:38:31 +0100
commit4a58579b9e4e2a35d57e6c9c8483e52f6f1b7fd6 (patch)
treef3a7f898a081d0917f7fe7f051aba687308cbf0a /fs/jbd2
parentext4: Wait for proper transaction commit on fsync (diff)
downloadlinux-4a58579b9e4e2a35d57e6c9c8483e52f6f1b7fd6.tar.xz
linux-4a58579b9e4e2a35d57e6c9c8483e52f6f1b7fd6.zip
ext4: Fix insufficient checks in EXT4_IOC_MOVE_EXT
This patch fixes three problems in the handling of the EXT4_IOC_MOVE_EXT ioctl: 1. In current EXT4_IOC_MOVE_EXT, there are read access mode checks for original and donor files, but they allow the illegal write access to donor file, since donor file is overwritten by original file data. To fix this problem, change access mode checks of original (r->r/w) and donor (r->w) files. 2. Disallow the use of donor files that have a setuid or setgid bits. 3. Call mnt_want_write() and mnt_drop_write() before and after ext4_move_extents() calling to get write access to a mount. Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2')
0 files changed, 0 insertions, 0 deletions