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

2019-01-07 Thread Michel Dänzer
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 >>>

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

2019-01-07 Thread Yu Zhao
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

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

2019-01-03 Thread Michel Dänzer
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: