Re: [PATCH v5 1/2] drm/amd: validate user pitch alignment

On 2019-01-07 5:00 a.m., Yu Zhao wrote: > On Thu, Jan 03, 2019 at 05:33:19PM +0100, Michel Dänzer wrote: >> On 2018-12-30 2:00 a.m., Yu Zhao wrote: >>> Userspace may request pitch alignment that is not supported by GPU. >>> Some requests 32, but GPU ignores it and uses default 64 when cpp is >>> 4.

Re: [PATCH v5 1/2] drm/amd: validate user pitch alignment

On Thu, Jan 03, 2019 at 05:33:19PM +0100, Michel Dänzer wrote: > On 2018-12-30 2:00 a.m., Yu Zhao wrote: > > Userspace may request pitch alignment that is not supported by GPU. > > Some requests 32, but GPU ignores it and uses default 64 when cpp is > > 4. If GEM object is allocated based on the sm

Re: [PATCH v5 1/2] drm/amd: validate user pitch alignment

On 2018-12-30 2:00 a.m., Yu Zhao wrote: > Userspace may request pitch alignment that is not supported by GPU. > Some requests 32, but GPU ignores it and uses default 64 when cpp is > 4. If GEM object is allocated based on the smaller alignment, GPU > DMA will go out of bound. > > Cc: sta...@vger.k

[PATCH v5 1/2] drm/amd: validate user pitch alignment

Userspace may request pitch alignment that is not supported by GPU. Some requests 32, but GPU ignores it and uses default 64 when cpp is 4. If GEM object is allocated based on the smaller alignment, GPU DMA will go out of bound. Cc: sta...@vger.kernel.org # v4.2+ Signed-off-by: Yu Zhao --- drive