[PATCH v3 0/2] drm/nouveau/dmem: Fix Vulnerability and Device Channels configuration

[Yonatan Maman]

From: Yonatan Maman <Ymaman at Nvidia.com>

This patch series addresses two critical issues in the Nouveau driver
related to device channels, error handling, and sensitive data leaks.

- Vulnerability in migrate_to_ram: The migrate_to_ram function might
  return a dirty HIGH_USER page when a copy push command (FW channel)
  fails, potentially exposing sensitive data and posing a security
  risk. To mitigate this, the patch ensures the allocation of a non-dirty
  (zero) page for the destination, preventing the return of a dirty page
  and enhancing driver security in case of failure.

- Privileged Error in Copy Engine Channel: An error was observed when
  the nouveau_dmem_copy_one function is executed, leading to a Host Copy
  Engine Privileged error on channel 1. The patch resolves this by
  adjusting the Copy Engine channel configuration to permit privileged
  push commands, resolving the error.

Changes since V2:
- Fixed version according to Danilo Krummrich's comments.


Yonatan Maman (2):
  nouveau/dmem: Fix privileged error in copy engine channel
  nouveau/dmem: Fix vulnerability in migrate_to_ram upon copy error

 drivers/gpu/drm/nouveau/nouveau_dmem.c | 2 +-
 drivers/gpu/drm/nouveau/nouveau_drm.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

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2.34.1