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https://bugs.freedesktop.org/show_bug.cgi?id=2119
Summary: via: insufficient security checks on DMA init IOCTL
Product: DRI
Version: DRI CVS
Platform: PC
OS/Version: Linux
Status: NEW
Severity: major
Priority: P1
Component: DRM modules
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
The DRM_IOCTL_VIA_DMA_INIT can be called as a normal user.
This is of course easy to change, but Mesa 3D uses it to check whether AGP DMA
has been initialized and if not, uses the PCI path.
Either a separate user-callable IOCTL that checks wether AGP DMA has been
initialized is needed or a check for caller privileges is needed for
VIA_INIT_DMA and VIA_CLEANUP_DMA functions, whereas VIA_DMA_INITIALIZED should
be allowed as normal user.
Suggestions are appreciated.
/Thomas
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