On Wed, May 13, 2020 at 05:08:19PM +0000, Ashwin H wrote: > > Ok, but what does that mean for us? > > > > You need to say why you are sending a patch, otherwise we will guess wrong. > > In drivers/gpu/drm/i915/i915_gem_execbuffer.c, ioctl functions does user_access_begin() without doing access_ok(Checks if a user space pointer is valid) first. > A local attacker can craft a malicious ioctl function call to overwrite arbitrary kernel memory, resulting in a Denial of Service or privilege escalation (CVE-2018-20669) > > This patch makes sure that user_access_begin always does access_ok. > user_access_begin has been modified to do access_ok internally. I had this in the tree, but it broke the build on alpha, sh, and maybe a few others :( See: https://lore.kernel.org/r/20200527140225.GA214763@xxxxxxxxxxxx for the details. Can you dig out all of the needed follow-on patches as well, and send them all as a patch series for 4.19.y so that I can queue them all up at once? thanks, greg k-h _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
