drm/amdgpu: fix tear down order in amdgpu_vm_pt_free

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commit ceb9a321e7 upstream.

When freeing PD/PT with shadows it can happen that the shadow
destruction races with detaching the PD/PT from the VM causing a NULL
pointer dereference in the invalidation code.

Fix this by detaching the the PD/PT from the VM first and then
freeing the shadow instead.

Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: https://gitlab.freedesktop.org/drm/amd/-/issues/2867
Cc: <stable@vger.kernel.org>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Christian König 2023-12-08 13:43:09 +01:00 • committed by Greg Kroah-Hartman

parent d3cf024353

commit d50670681d

1 changed files with 2 additions and 1 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c

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