diff options
author | Darrick J. Wong <djwong@kernel.org> | 2022-03-10 13:14:39 -0800 |
---|---|---|
committer | Darrick J. Wong <djwong@kernel.org> | 2022-04-18 20:59:42 -0700 |
commit | c4b17d9e421047d1eebb7db78c913fad34b0f55c (patch) | |
tree | b057ff0408ebac7ac6c05e6cae272e87ac7ed731 /fs/ceph/Kconfig | |
parent | ad7bbbb030119f5b7866430e8f58e7ffb97185a3 (diff) |
btrfs: fix fallocate to use file_modified to update permissions consistentlyfalloc-permissions-fixes-5.18_2022-04-18
Since the initial introduction of (posix) fallocate back at the turn of
the century, it has been possible to use this syscall to change the
user-visible contents of files. This can happen by extending the file
size during a preallocation, or through any of the newer modes (punch,
zero range). Because the call can be used to change file contents, we
should treat it like we do any other modification to a file -- update
the mtime, and drop set[ug]id privileges/capabilities.
The VFS function file_modified() does all this for us if pass it a
locked inode, so let's make fallocate drop permissions correctly.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/ceph/Kconfig')
0 files changed, 0 insertions, 0 deletions