From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Date: Sat, 13 May 2023 12:51:00 +0000 (+0200)
Subject: drm/amdgpu: Validate VM ioctl flags.
X-Git-Tag: v5.4.251~303
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=794bfb6fd9929603fcb8b828741f72171f53b302;p=thirdparty%2Fkernel%2Fstable.git

drm/amdgpu: Validate VM ioctl flags.

commit a2b308044dcaca8d3e580959a4f867a1d5c37fac upstream.

None have been defined yet, so reject anybody setting any. Mesa sets
it to 0 anyway.

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index fb47ddc6f7f4e..dcf23b43f323c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -3076,6 +3076,10 @@ int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 	struct amdgpu_fpriv *fpriv = filp->driver_priv;
 	int r;
 
+	/* No valid flags defined yet */
+	if (args->in.flags)
+		return -EINVAL;
+
 	switch (args->in.op) {
 	case AMDGPU_VM_OP_RESERVE_VMID:
 		/* current, we only have requirement to reserve vmid from gfxhub */