> -----Original Message----- > From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf > Of Michel Dänzer > Sent: Monday, August 28, 2017 5:24 AM > To: amd-gfx at lists.freedesktop.org > Subject: [PATCH xf86-video-ati 0/6] Harden against other DRM masters > > From: Michel Dänzer <michel.daenzer at amd.com> > > While our VT is inactive, so we aren't DRM master, other processes can > become DRM master. A DRM master can access any KMS framebuffer (FB) > by > guessing its handle (in practice, it should be easy to find all existing > FBs by brute-forcing through a relatively small number of handles). > > This series makes us destroy all FBs created by this driver before > leaving our VT, except for an all-black one created especially for this > purpose. This closes a long-standing potential information leak, which > was made worse by reference-counting the FBs we create. > > Patches 1-4 are preparatory. The meat is in patch 5. Patch 6 removes a > function which is no longer used with patch 5. Series is: Reviewed-by: Alex Deucher <alexander.deucher at amd.com> > > Michel Dänzer (6): > Create radeon_pixmap_clear helper > Create drmmode_set_mode helper > Create radeon_pixmap_get_fb_ptr helper > Create radeon_master_screen helper > Make all active CRTCs scan out an all-black framebuffer in LeaveVT > Remove drmmode_scanout_free > > src/drmmode_display.c | 112 +++++++++++++++++++++++------------------- > ------- > src/drmmode_display.h | 8 +++- > src/radeon.h | 67 ++++++++++++++++------------- > src/radeon_bo_helper.c | 21 ++++++++++ > src/radeon_bo_helper.h | 3 ++ > src/radeon_kms.c | 98 > ++++++++++++++++++++++++++++++++++++++++--- > 6 files changed, 214 insertions(+), 95 deletions(-) > > -- > 2.14.1 > > _______________________________________________ > amd-gfx mailing list > amd-gfx at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/amd-gfx
