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* [PATCH v3] amdgpu: validate offset_in_bo of drm_amdgpu_gem_va
@ 2023-06-01 22:44 Chia-I Wu
  2023-06-02 11:43 ` Christian König
  0 siblings, 1 reply; 3+ messages in thread
From: Chia-I Wu @ 2023-06-01 22:44 UTC (permalink / raw)
  To: dri-devel
  Cc: Alex Deucher, Christian König, Pan, Xinhui, David Airlie,
	Daniel Vetter, Felix Kuehling, Philip Yang, Hawking Zhang,
	Mukul Joshi, Danijel Slivka, Lang Yu, Marek Olšák,
	Jammy Zhou, amd-gfx, linux-kernel

This is motivated by OOB access in amdgpu_vm_update_range when
offset_in_bo+map_size overflows.

v2: keep the validations in amdgpu_vm_bo_map
v3: add the validations to amdgpu_vm_bo_map/amdgpu_vm_bo_replace_map
    rather than to amdgpu_gem_va_ioctl

Fixes: 9f7eb5367d00 ("drm/amdgpu: actually use the VM map parameters")
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 22f9a65ca0fc7..76d57bc7ac620 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1434,14 +1434,14 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
 	uint64_t eaddr;
 
 	/* validate the parameters */
-	if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK ||
-	    size == 0 || size & ~PAGE_MASK)
+	if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK || size & ~PAGE_MASK)
+		return -EINVAL;
+	if (saddr + size <= saddr || offset + size <= offset)
 		return -EINVAL;
 
 	/* make sure object fit at this offset */
 	eaddr = saddr + size - 1;
-	if (saddr >= eaddr ||
-	    (bo && offset + size > amdgpu_bo_size(bo)) ||
+	if ((bo && offset + size > amdgpu_bo_size(bo)) ||
 	    (eaddr >= adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT))
 		return -EINVAL;
 
@@ -1500,14 +1500,14 @@ int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
 	int r;
 
 	/* validate the parameters */
-	if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK ||
-	    size == 0 || size & ~PAGE_MASK)
+	if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK || size & ~PAGE_MASK)
+		return -EINVAL;
+	if (saddr + size <= saddr || offset + size <= offset)
 		return -EINVAL;
 
 	/* make sure object fit at this offset */
 	eaddr = saddr + size - 1;
-	if (saddr >= eaddr ||
-	    (bo && offset + size > amdgpu_bo_size(bo)) ||
+	if ((bo && offset + size > amdgpu_bo_size(bo)) ||
 	    (eaddr >= adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT))
 		return -EINVAL;
 
-- 
2.41.0.rc0.172.g3f132b7071-goog


^ permalink raw reply related	[flat|nested] 3+ messages in thread
* Re: [PATCH v3] amdgpu: validate offset_in_bo of drm_amdgpu_gem_va
  2023-06-01 22:44 [PATCH v3] amdgpu: validate offset_in_bo of drm_amdgpu_gem_va Chia-I Wu
@ 2023-06-02 11:43 ` Christian König
  2023-06-02 18:22   ` Alex Deucher
  0 siblings, 1 reply; 3+ messages in thread
From: Christian König @ 2023-06-02 11:43 UTC (permalink / raw)
  To: Chia-I Wu, dri-devel
  Cc: Alex Deucher, Pan, Xinhui, David Airlie, Daniel Vetter,
	Felix Kuehling, Philip Yang, Hawking Zhang, Mukul Joshi,
	Danijel Slivka, Lang Yu, Marek Olšák, Jammy Zhou,
	amd-gfx, linux-kernel

Am 02.06.23 um 00:44 schrieb Chia-I Wu:
> This is motivated by OOB access in amdgpu_vm_update_range when
> offset_in_bo+map_size overflows.
>
> v2: keep the validations in amdgpu_vm_bo_map
> v3: add the validations to amdgpu_vm_bo_map/amdgpu_vm_bo_replace_map
>      rather than to amdgpu_gem_va_ioctl
>
> Fixes: 9f7eb5367d00 ("drm/amdgpu: actually use the VM map parameters")
> Signed-off-by: Chia-I Wu <olvaffe@gmail.com>

Reviewed-by: Christian König <christian.koenig@amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 16 ++++++++--------
>   1 file changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index 22f9a65ca0fc7..76d57bc7ac620 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -1434,14 +1434,14 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
>   	uint64_t eaddr;
>   
>   	/* validate the parameters */
> -	if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK ||
> -	    size == 0 || size & ~PAGE_MASK)
> +	if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK || size & ~PAGE_MASK)
> +		return -EINVAL;
> +	if (saddr + size <= saddr || offset + size <= offset)
>   		return -EINVAL;
>   
>   	/* make sure object fit at this offset */
>   	eaddr = saddr + size - 1;
> -	if (saddr >= eaddr ||
> -	    (bo && offset + size > amdgpu_bo_size(bo)) ||
> +	if ((bo && offset + size > amdgpu_bo_size(bo)) ||
>   	    (eaddr >= adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT))
>   		return -EINVAL;
>   
> @@ -1500,14 +1500,14 @@ int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
>   	int r;
>   
>   	/* validate the parameters */
> -	if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK ||
> -	    size == 0 || size & ~PAGE_MASK)
> +	if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK || size & ~PAGE_MASK)
> +		return -EINVAL;
> +	if (saddr + size <= saddr || offset + size <= offset)
>   		return -EINVAL;
>   
>   	/* make sure object fit at this offset */
>   	eaddr = saddr + size - 1;
> -	if (saddr >= eaddr ||
> -	    (bo && offset + size > amdgpu_bo_size(bo)) ||
> +	if ((bo && offset + size > amdgpu_bo_size(bo)) ||
>   	    (eaddr >= adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT))
>   		return -EINVAL;
>   


^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [PATCH v3] amdgpu: validate offset_in_bo of drm_amdgpu_gem_va
  2023-06-02 11:43 ` Christian König
@ 2023-06-02 18:22   ` Alex Deucher
  0 siblings, 0 replies; 3+ messages in thread
From: Alex Deucher @ 2023-06-02 18:22 UTC (permalink / raw)
  To: Christian König
  Cc: Chia-I Wu, dri-devel, Philip Yang, Jammy Zhou, Mukul Joshi,
	Lang Yu, Felix Kuehling, Pan, Xinhui, linux-kernel, amd-gfx,
	Marek Olšák, Daniel Vetter, Alex Deucher, David Airlie,
	Danijel Slivka, Hawking Zhang

Applied.  Thanks!


Alex

On Fri, Jun 2, 2023 at 7:43 AM Christian König <christian.koenig@amd.com> wrote:
>
> Am 02.06.23 um 00:44 schrieb Chia-I Wu:
> > This is motivated by OOB access in amdgpu_vm_update_range when
> > offset_in_bo+map_size overflows.
> >
> > v2: keep the validations in amdgpu_vm_bo_map
> > v3: add the validations to amdgpu_vm_bo_map/amdgpu_vm_bo_replace_map
> >      rather than to amdgpu_gem_va_ioctl
> >
> > Fixes: 9f7eb5367d00 ("drm/amdgpu: actually use the VM map parameters")
> > Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
>
> Reviewed-by: Christian König <christian.koenig@amd.com>
>
> > ---
> >   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 16 ++++++++--------
> >   1 file changed, 8 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> > index 22f9a65ca0fc7..76d57bc7ac620 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> > @@ -1434,14 +1434,14 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
> >       uint64_t eaddr;
> >
> >       /* validate the parameters */
> > -     if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK ||
> > -         size == 0 || size & ~PAGE_MASK)
> > +     if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK || size & ~PAGE_MASK)
> > +             return -EINVAL;
> > +     if (saddr + size <= saddr || offset + size <= offset)
> >               return -EINVAL;
> >
> >       /* make sure object fit at this offset */
> >       eaddr = saddr + size - 1;
> > -     if (saddr >= eaddr ||
> > -         (bo && offset + size > amdgpu_bo_size(bo)) ||
> > +     if ((bo && offset + size > amdgpu_bo_size(bo)) ||
> >           (eaddr >= adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT))
> >               return -EINVAL;
> >
> > @@ -1500,14 +1500,14 @@ int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
> >       int r;
> >
> >       /* validate the parameters */
> > -     if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK ||
> > -         size == 0 || size & ~PAGE_MASK)
> > +     if (saddr & ~PAGE_MASK || offset & ~PAGE_MASK || size & ~PAGE_MASK)
> > +             return -EINVAL;
> > +     if (saddr + size <= saddr || offset + size <= offset)
> >               return -EINVAL;
> >
> >       /* make sure object fit at this offset */
> >       eaddr = saddr + size - 1;
> > -     if (saddr >= eaddr ||
> > -         (bo && offset + size > amdgpu_bo_size(bo)) ||
> > +     if ((bo && offset + size > amdgpu_bo_size(bo)) ||
> >           (eaddr >= adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT))
> >               return -EINVAL;
> >
>

^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-06-02 18:23 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2023-06-01 22:44 [PATCH v3] amdgpu: validate offset_in_bo of drm_amdgpu_gem_va Chia-I Wu
2023-06-02 11:43 ` Christian König
2023-06-02 18:22   ` Alex Deucher

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