Commit 62f29bab authored by serue@us.ibm.com's avatar serue@us.ibm.com Committed by Dave Airlie

agp: remove uid comparison as security check

In the face of containers and user namespaces, a uid==0 check for
security is not safe.  Switch to a capability check.

I'm not sure I picked the right capability, but this being AGP
CAP_SYS_RAWIO seemed to make sense.
Signed-off-by: default avatarSerge Hallyn <serue@us.ibm.com>
Signed-off-by: default avatarDave Airlie <airlied@linux.ie>
parent 1fa4db7d
......@@ -689,7 +689,7 @@ static int agp_open(struct inode *inode, struct file *file)
set_bit(AGP_FF_ALLOW_CLIENT, &priv->access_flags);
priv->my_pid = current->pid;
if ((current->uid == 0) || (current->suid == 0)) {
if (capable(CAP_SYS_RAWIO)) {
/* Root priv, can be controller */
set_bit(AGP_FF_ALLOW_CONTROLLER, &priv->access_flags);
}
......
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