From: Luben Tuikov <luben.tuikov@amd.com>
Date: Wed, 4 Jan 2023 22:09:02 +0000 (-0500)
Subject: drm/amdgpu: Fix potential NULL dereference
X-Git-Tag: v6.6.7~3748^2~2^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0be7ed8e7eb15282b5d0f6fdfea884db594ea9bf;p=platform%2Fkernel%2Flinux-starfive.git

drm/amdgpu: Fix potential NULL dereference

Fix potential NULL dereference, in the case when "man", the resource manager
might be NULL, when/if we print debug information.

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: AMD Graphics <amd-gfx@lists.freedesktop.org>
Cc: Dan Carpenter <error27@gmail.com>
Cc: kernel test robot <lkp@intel.com>
Fixes: 7554886daa31ea ("drm/amdgpu: Fix size validation for non-exclusive domains (v4)")
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 4e684c2..25a68d8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -470,8 +470,9 @@ static bool amdgpu_bo_validate_size(struct amdgpu_device *adev,
 	return true;
 
 fail:
-	DRM_DEBUG("BO size %lu > total memory in domain: %llu\n", size,
-		  man->size);
+	if (man)
+		DRM_DEBUG("BO size %lu > total memory in domain: %llu\n", size,
+			  man->size);
 	return false;
 }