On Mon, Jan 30, 2017 at 11:58:32AM +0100, Lucas Stach wrote: > Am Freitag, den 09.12.2016, 12:21 +0100 schrieb Christian Gmeiner: > > Reading some registers end in a system crash ala: > > > > Unhandled fault: external abort on non-linefetch (0x1028) at 0xfe641000 > > Internal error: : 1028 [#1] PREEMPT ARM > > > > Avoid those by register validation. > > Avoiding crashes is one thing, but I believe this needs to go further > and avoid reads from any register that isn't a performance counter. This > probably isn't a big hole, but we want to avoid leaking the GPU state to > userspace. We certainly don't want to let people use this to read stuff like the ID registers, bypassing the kernel. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
