On Mon, 01 Jun 2026, Jani Nikula <[email protected]> wrote: > On Fri, 29 May 2026, Thomas Zimmermann <[email protected]> wrote: >> Rajat Gupta (1): >> drm: prevent integer overflows in dumb buffer creation helpers > > Looks like this commit 5ab62dd3687b ("drm: prevent integer overflows in > dumb buffer creation helpers") regressed in our CI, awaiting > confirmation.
The IGT test kms_big_fb uses max width and height from GetResources, and i915 and xe use max_width 16384 and max_height 16384 in mode config. The regressing commit adds random hard limits not based on anything: + /* Reject unreasonable inputs early. Dumb buffers are for software + * rendering; nothing legitimate needs more than 8192x8192 at 32bpp. + * This prevents overflows in downstream alignment helpers. + */ + if (args->width >= 8192 || args->height >= 8192 || args->bpp > 32) + return -EINVAL; This is now in v7.1-rc6. Please revert ASAP. BR, Jani. > > No matter what, it's immediately suspect because AFAICT it was not > posted on the lists, and the commit doesn't have a Link: trailer > pointing at the patch. > > This is not how we're supposed to roll. What's going on? > > > BR, > Jani. -- Jani Nikula, Intel
