drm: nv04: Fix out of bounds access

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: drm: nv04: Fix out of bounds access When Output Resource (dcb->or) value is assigned in fabricate_dcb_output(), there may be out of bounds access to dac_users array in case dcb->or is zero because ffs(dcb->or) is used as index there. The 'or' argument of fabricate_dcb_output() must be interpreted as a number of bit to set, not value. Utilize macros from 'enum nouveau_or' in calls instead of hardcoding. Found by Linux Verification Center (linuxtesting.org) with SVACE.

References

• https://git.kernel.org/stable/c/c2b97f26f081ceec3298151481687071075a25cb
• https://git.kernel.org/stable/c/5050ae879a828d752b439e3827aac126709da6d1
• https://git.kernel.org/stable/c/097c7918fcfa1dee233acfd1f3029f00c3bc8062
• https://git.kernel.org/stable/c/df0991da7db846f7fa4ec6740350f743d3b69b04
• https://git.kernel.org/stable/c/5fd4b090304e450aa0e7cc9cc2b4873285c6face
• https://git.kernel.org/stable/c/6690cc2732e2a8d0eaca44dcbac032a4b0148042
• https://git.kernel.org/stable/c/26212da39ee14a52c76a202c6ae5153a84f579a5
• https://git.kernel.org/stable/c/cf92bb778eda7830e79452c6917efa8474a30c1e