[REVIEW][PATCH 1/6] vfs: Don't allow changing the link count of an inode with an invalid uid or gid

Christian Brauner christian at brauner.io
Thu May 24 22:30:41 UTC 2018


On Thu, May 24, 2018 at 07:58:32AM -0500, Seth Forshee wrote:
> On Wed, May 23, 2018 at 06:25:33PM -0500, Eric W. Biederman wrote:
> > Changing the link count of an inode via unlink or link will cause a
> > write back of that inode.  If the uids or gids are invalid (aka not known
> > to the kernel) writing the inode back may change the uid or gid in the
> > filesystem.   To prevent possible filesystem and to avoid the need for
> > filesystem maintainers to worry about it don't allow operations on
> > inodes with an invalid uid or gid.
> > 
> > Signed-off-by: "Eric W. Biederman" <ebiederm at xmission.com>
> 
> Acked-by: Seth Forshee <seth.forshee at canonical.com>

Acked-by: Christian Brauner <christian at brauner.io>


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