I've already submitted a report for this through this form: AMD Issue Reporting Form
I wasn't given a tracking ID though, so I'd like to continue discussion here.
Is anyone else seeing this error in the VBox.log file when 3D acceleration is enabled for the guest VM? Any workarounds?
00:00:01.386399 supR3HardenedErrorV: supR3HardenedScreenImage/NtCreateSection: rc=VERR_BAD_EXE_FORMAT fImage=1 fProtect=0x7 fAccess=0x2 \Device\HarddiskVolume2\Windows\System32\drivers\atikmdag.sys:
00:00:01.386637 supR3HardenedErrorV: supR3HardenedScreenImage/NtCreateSection: cached rc=VERR_BAD_EXE_FORMAT fImage=1 fProtect=0x2 fAccess=0x7 cHits=1 \Device\HarddiskVolume2\Windows\System32\drivers\atikmdag.sys
I've done a clean install of the 16.1 Crimson Hot-Fix drivers, but the issue is still there. The VirtualBox staff has directed that the issue is in the host driver, pointing to AMD (hence the bug report).
Host: Win7 x64, SP1
Guest: any linux VM (in my case, Arch & Debian) with Guest Additions
VirtualBox 5.0.12 r104815
Graphics: Radeon HD 7950 (Gigabyte GV-R795WF3-3GD)