linux-kernel - [PATCH drm-misc-next 2/5] drm/imagination: vm: check for drm_gpuvm_range

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Message-ID: <20231124233650.152653-3-dakr@redhat.com>
Date:   Sat, 25 Nov 2023 00:36:37 +0100
From:   Danilo Krummrich <dakr@...hat.com>
To:     mripard@...nel.org, airlied@...il.com, daniel@...ll.ch,
        frank.binns@...tec.com, donald.robson@...tec.com,
        matt.coster@...tec.com, sarah.walker@...tec.com
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Danilo Krummrich <dakr@...hat.com>
Subject: [PATCH drm-misc-next 2/5] drm/imagination: vm: check for drm_gpuvm_range_valid()

Extend pvr_device_addr_and_size_are_valid() by the corresponding GPUVM
sanity checks. This includes a, previously missing, overflow check for
the base address and size of the requested mapping.

Fixes: ff5f643de0bf ("drm/imagination: Add GEM and VM related code")
Signed-off-by: Danilo Krummrich <dakr@...hat.com>
---
 drivers/gpu/drm/imagination/pvr_vm.c | 9 ++++++---
 drivers/gpu/drm/imagination/pvr_vm.h | 3 ++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/imagination/pvr_vm.c b/drivers/gpu/drm/imagination/pvr_vm.c
index 09d481c575b0..1e89092c3dcc 100644
--- a/drivers/gpu/drm/imagination/pvr_vm.c
+++ b/drivers/gpu/drm/imagination/pvr_vm.c
@@ -239,7 +239,7 @@ pvr_vm_bind_op_map_init(struct pvr_vm_bind_op *bind_op,
 		return -EINVAL;
 	}
 
-	if (!pvr_device_addr_and_size_are_valid(device_addr, size) ||
+	if (!pvr_device_addr_and_size_are_valid(vm_ctx, device_addr, size) ||
 	    offset & ~PAGE_MASK || size & ~PAGE_MASK ||
 	    offset >= pvr_obj_size || offset_plus_size > pvr_obj_size)
 		return -EINVAL;
@@ -295,7 +295,7 @@ pvr_vm_bind_op_unmap_init(struct pvr_vm_bind_op *bind_op,
 {
 	int err;
 
-	if (!pvr_device_addr_and_size_are_valid(device_addr, size))
+	if (!pvr_device_addr_and_size_are_valid(vm_ctx, device_addr, size))
 		return -EINVAL;
 
 	bind_op->type = PVR_VM_BIND_TYPE_UNMAP;
@@ -505,6 +505,7 @@ pvr_device_addr_is_valid(u64 device_addr)
 /**
  * pvr_device_addr_and_size_are_valid() - Tests whether a device-virtual
  * address and associated size are both valid.
+ * @vm_ctx: Target VM context.
  * @device_addr: Virtual device address to test.
  * @size: Size of the range based at @device_addr to test.
  *
@@ -523,9 +524,11 @@ pvr_device_addr_is_valid(u64 device_addr)
  *  * %false otherwise.
  */
 bool
-pvr_device_addr_and_size_are_valid(u64 device_addr, u64 size)
+pvr_device_addr_and_size_are_valid(struct pvr_vm_context *vm_ctx,
+				   u64 device_addr, u64 size)
 {
 	return pvr_device_addr_is_valid(device_addr) &&
+	       drm_gpuvm_range_valid(&vm_ctx->gpuvm_mgr, device_addr, size) &&
 	       size != 0 && (size & ~PVR_DEVICE_PAGE_MASK) == 0 &&
 	       (device_addr + size <= PVR_PAGE_TABLE_ADDR_SPACE_SIZE);
 }
diff --git a/drivers/gpu/drm/imagination/pvr_vm.h b/drivers/gpu/drm/imagination/pvr_vm.h
index cf8b97553dc8..f2a6463f2b05 100644
--- a/drivers/gpu/drm/imagination/pvr_vm.h
+++ b/drivers/gpu/drm/imagination/pvr_vm.h
@@ -29,7 +29,8 @@ struct drm_exec;
 /* Functions defined in pvr_vm.c */
 
 bool pvr_device_addr_is_valid(u64 device_addr);
-bool pvr_device_addr_and_size_are_valid(u64 device_addr, u64 size);
+bool pvr_device_addr_and_size_are_valid(struct pvr_vm_context *vm_ctx,
+					u64 device_addr, u64 size);
 
 struct pvr_vm_context *pvr_vm_create_context(struct pvr_device *pvr_dev,
 					     bool is_userspace_context);
-- 
2.42.0