https://bugs.freedesktop.org/show_bug.cgi?id=89957

Bug ID: 89957 Summary: vm protection faults in piglit lest: texsubimage cube_map_array pbo Product: Mesa Version: git Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/radeonsi Assignee: dri-devel@lists.freedesktop.org Reporter: tstellar@gmail.com QA Contact: dri-devel@lists.freedesktop.org

To reproduce: /home/tstellar/piglit/bin/texsubimage cube_map_array pbo -auto -fbo

I've spent some time debugging this and it appears the result from the v_cubeid_f32 instruction is causing the shader to access memory outside the bounds of the texture.

If I replace v_cubeid_f32 $dst, $src0, $src1, $src2 instructions with v_mov_f32 $dst, 0.0 or v_mov_f32 $dst, 1.0 I no longer see vm protection faults.

However, if I replace the v_cubeid_f32 instructions with v_mov_f32 $dst, 2.0 then the vm protection faults return. So, it seems the bad case is whenever the face id is computed as >= 2.0f.