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| author | Sunil Khatri <sunil.khatri@amd.com> | 2026-02-20 13:47:58 +0530 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-02-25 16:29:26 -0500 |
| commit | be267e15f99bc97cbe202cd556717797cdcf79a5 (patch) | |
| tree | 712535c17ff78f7a05d552bad24a1cf158eb6235 /drivers/gpu | |
| parent | 2de9353e193fd62dfa65c45890dd2f9c53f12527 (diff) | |
| download | linux-be267e15f99bc97cbe202cd556717797cdcf79a5.tar.gz linux-be267e15f99bc97cbe202cd556717797cdcf79a5.zip | |
drm/amdgpu: add upper bound check on user inputs in signal ioctl
Huge input values in amdgpu_userq_signal_ioctl can lead to a OOM and
could be exploited.
So check these input value against AMDGPU_USERQ_MAX_HANDLES
which is big enough value for genuine use cases and could
potentially avoid OOM.
Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c index b215015a165c..10669a249b9f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c @@ -35,6 +35,8 @@ static const struct dma_fence_ops amdgpu_userq_fence_ops; static struct kmem_cache *amdgpu_userq_fence_slab; +#define AMDGPU_USERQ_MAX_HANDLES (1U << 16) + int amdgpu_userq_fence_slab_init(void) { amdgpu_userq_fence_slab = kmem_cache_create("amdgpu_userq_fence", @@ -477,6 +479,11 @@ int amdgpu_userq_signal_ioctl(struct drm_device *dev, void *data, if (!amdgpu_userq_enabled(dev)) return -ENOTSUPP; + if (args->num_syncobj_handles > AMDGPU_USERQ_MAX_HANDLES || + args->num_bo_write_handles > AMDGPU_USERQ_MAX_HANDLES || + args->num_bo_read_handles > AMDGPU_USERQ_MAX_HANDLES) + return -EINVAL; + num_syncobj_handles = args->num_syncobj_handles; syncobj_handles = memdup_array_user(u64_to_user_ptr(args->syncobj_handles), num_syncobj_handles, sizeof(u32)); |