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 003aa9e47085e0943536d97ac9029ae5ebd43301..5a8a4cda7e9873e22392e5bc72d54bfcfe9b036a 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2363,6 +2363,10 @@ int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
        long timeout = msecs_to_jiffies(2000);
        int r;
 
+       /* No valid flags defined yet */
+       if (args->in.flags)
+               return -EINVAL;
+
        switch (args->in.op) {
        case AMDGPU_VM_OP_RESERVE_VMID:
                /* We only have requirement to reserve vmid from gfxhub */