Description: drm/virtio: Fix NULL vs IS_ERR checking in virtio_gpu_object_shmem_init
References:
Notes:
 bwh> Introduced in 5.5 by commit c66df701e783 "drm/virtio: switch
 bwh> from ttm to gem shmem helpers".
Bugs:
upstream: released (6.0-rc1) [c24968734abfed81c8f93dc5f44a7b7a9aecadfa, 64b88afbd92fbf434759d1896a7cf705e1c00e79]
6.1-upstream-stable: N/A "Fixed before branching point"
5.10-upstream-stable: released (5.10.171) [0a4181b23acf53e9c95b351df6a7891116b98f9b, 87c647def389354c95263d6635c62ca0de7d12ca]
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (6.0.3-1)
6.1-bookworm-security: N/A "Fixed before branch point"
5.10-bullseye-security: released (5.10.178-1)
4.19-buster-security: N/A "Vulnerable code not present"