Re: Bug: mount doing bad security check: only root can use -types, (effective EUID is 5013)

[L A Walsh <lkml@tlinx.org>]

Karel Zak wrote:
> ruid = getuid();
>     euid = geteuid();
>
>     cxt->restricted = (uid_t) 0 == ruid && ruid == euid ? 0 : 1;
>
> in your case geteuid() returns 5013.
>   
----
    But my EUID isn't 5013 ("LOGINUID" is). That's the complaint/bug. 
I looked at 'id': it doesn't show euid:

Ishtar:/tmp> sudo bash -c 'id; echo "UID=$UID, EUID=$EUID"; /bin/mount 
devpts /tmp/mnt -t devpts'
uid=0(root) gid=0(root) groups=...
UID=0, EUID=0
mount: only root can use "--types" option (effective UID is 5013)

I also mentioned I'm using
'sudo', which also sets both the UID & EUID to the new USER (unless
you go out of your way to configure it not to do so -- in which case
many things don't function normally -- including bash which would
operate in restricted mode (like rbash).