[LU-5491] lnet_ioctl must verify userspace ioctl buffer

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Labels: lnet
• Severity: 3
• Assignee: WC Triage
• Reporter: Oleg Drokin

Description

I was just inspecting some lnet patch and noticed that lnet_ioctl->LNetCtl do quite a few unchecked userspace acess.
It looks like doing the check that the ioctl data is valid in lnet_ioctl is the most easy way to fix this.