Description: drm/msm/dpu: check for valid hw_pp in dpu_encoder_helper_phys_cleanup
References:
Notes:
 carnil> Introduced in ae4d721ce100 ("drm/msm/dpu: add an API to reset the encoder
 carnil> related hw blocks"). Vulnerable versions: 5.19-rc1.
Bugs:
upstream: released (6.8-rc4) [7f3d03c48b1eb6bc45ab20ca98b8b11be25f9f52]
6.7-upstream-stable: released (6.7.5) [eb4f56f3ff5799ca754ae6d811803a63fe25a4a2]
6.6-upstream-stable: released (6.6.17) [79592a6e7bdc1d05460c95f891f5e5263a107af8]
6.1-upstream-stable: released (6.1.78) [fb8bfc6ea3cd8c5ac3d35711d064e2f6646aec17]
5.10-upstream-stable: N/A "Vulnerable code not present"
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (6.7.7-1)
6.1-bookworm-security: released (6.1.82-1)
5.10-bullseye-security: N/A "Vulnerable code not present"
4.19-buster-security: N/A "Vulnerable code not present"