From: Christian König <christian.koenig@amd.com>
Date: Mon, 18 May 2015 12:37:27 +0000 (+0200)
Subject: drm/amdgpu: validate amdgpu_vm_bo_map parameters
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0be52de91c5e275dff61f0ed2314d84c9d68b385;p=linux-beck.git

drm/amdgpu: validate amdgpu_vm_bo_map parameters

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 1cc01fb409dc..b25e533fd6e8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -936,6 +936,13 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
 	uint64_t eaddr;
 	int r;
 
+	/* validate the parameters */
+	if (saddr & AMDGPU_GPU_PAGE_MASK || offset & AMDGPU_GPU_PAGE_MASK ||
+	    size == 0 || size & AMDGPU_GPU_PAGE_MASK) {
+		amdgpu_bo_unreserve(bo_va->bo);
+		return -EINVAL;
+	}
+
 	/* make sure object fit at this offset */
 	eaddr = saddr + size;
 	if ((saddr >= eaddr) || (offset + size > amdgpu_bo_size(bo_va->bo))) {