| Priority | medium |
|---|---|
| Bug ID | 71282 |
| Assignee | dri-devel@lists.freedesktop.org |
| Summary | Cannot authenticate second libva client |
| Severity | normal |
| Classification | Unclassified |
| OS | Linux (All) |
| Reporter | rekjanov@epiphan.com |
| Hardware | x86-64 (AMD64) |
| Status | NEW |
| Version | unspecified |
| Component | General |
| Product | DRI |
Created attachment 88733 [details]
Test program
Environment:
* ubuntu 12.04.3 LTS with 3.8 kernel
* No X11, pure DRM
* libva 0.34
* libdrm 2.4.43
* regular user account, no CAP_SYS_ADMIN, but in 'video' group
* A simple program, which calls vaInitialize and then sleeps for several
seconds.
* Intel video hardware (Ivy Bridge)
Problem:
If another test program instance is started while the first is sleeping, it
fails in va_getDriverName.
Debugging and source review shows that the first instance is authenticated
automatically, because it gets the master. Second instance tries to
authenticate using authmagic, but fails because auth magic ioctl is marked as
DRM_AUTH - so you need to be already authenticated in order to authenticate!
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