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| author | Christian König <christian.koenig@amd.com> | 2023-12-08 13:43:09 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-12-13 16:08:01 -0500 |
| commit | 683b8c7e7a94fb7445b8d300c7404322ad040bab (patch) | |
| tree | aaf99619fe1a98bb58079ca669162d6ab7f6a904 /drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c | |
| parent | 73e5ea616a9f8c261d07e63b421947949ad6cbce (diff) | |
| download | linux-683b8c7e7a94fb7445b8d300c7404322ad040bab.tar.gz linux-683b8c7e7a94fb7445b8d300c7404322ad040bab.tar.bz2 linux-683b8c7e7a94fb7445b8d300c7404322ad040bab.zip | |
drm/amdgpu: fix tear down order in amdgpu_vm_pt_free
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>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c index a2287bb25223..a160265ddc07 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c @@ -642,13 +642,14 @@ static void amdgpu_vm_pt_free(struct amdgpu_vm_bo_base *entry) if (!entry->bo) return; + + entry->bo->vm_bo = NULL; shadow = amdgpu_bo_shadowed(entry->bo); if (shadow) { ttm_bo_set_bulk_move(&shadow->tbo, NULL); amdgpu_bo_unref(&shadow); } ttm_bo_set_bulk_move(&entry->bo->tbo, NULL); - entry->bo->vm_bo = NULL; spin_lock(&entry->vm->status_lock); list_del(&entry->vm_status); |