Stephen Smalley <sds@xxxxxxxxxxxxx> wrote:
> Neither fsopen() nor fscontext_fs_write() appear to perform any kind of
> up-front permission checking (DAC or MAC), although some security hooks may
> be ultimately called to allocate structures, parse security options, etc.
> Is there a reason not apply a may_mount() or similar check up front?
may_mount() is called by fsmount() at the moment. It may make sense to move
this earlier to fsopen(). Note that there's also going to be something that
looks like:
fd = fspick("/mnt");
fsmount(fd, "/a", MNT_NOEXEC); // ie. bind mount
or:
fd = fspick("/mnt");
write(fd, "o intr");
write(fd, "x reconfigure"); // ie. something like remount
close(fd);
I guess we'd want to call may_mount() in fspick() too. But there's also the
possibility of using this to create a query interfact too:
fd = fspick("/mnt");
write(fd, "q intr");
read(fd, value_buffer);
David
