Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau/uvmm: fix NULL deref unwinding an OP_MAP_SPARSE op Each bind_job_op is zeroed by kzalloc_obj() in bind_job_op_from_uop(), and the OP_MAP_SPARSE case in nouveau_uvmm_bind_job_submit() only creates a region, so op->ops stays NULL for a successfully processed sparse map. If a later op in the same job fails, the reverse unwind loop revisits that op and calls drm_gpuva_ops_free(&uvmm->base, op->ops) unconditionally. drm_gpuva_ops_free() dereferences its argument right away (list_for_each_entry_safe on &ops->list), so a NULL op->ops oopses. The path is reachable by any render-node fd holder, since NOUVEAU_VM_BIND is DRM_RENDER_ALLOW. Guard the free with IS_ERR_OR_NULL(), as nouveau_uvmm_bind_job_cleanup() already does for the identical free.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b88baab828713ce0b49b185444b2ee83bed373a8 before d8ec34618e71018fd7a3f73c57c6b92d71a6c7c3; affected b88baab828713ce0b49b185444b2ee83bed373a8 before 3bf493cf7ed0c2b3df728977a257e0d99b4db1c6; affected b88baab828713ce0b49b185444b2ee83bed373a8 before b7dc03e09313d22a6d230b759de3b05d504c008f; affected b88baab828713ce0b49b185444b2ee83bed373a8 before 3857238de6bce6c1573e8cb86c37b067e5208f05; affected b88baab828713ce0b49b185444b2ee83bed373a8 before 412a6ceb56d501ef2f8202e26ab4b5d4dfbca566 |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 6.6.160 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d8ec34618e71018fd7a3f73c57c6b92d71a6c7c3
- https://git.kernel.org/stable/c/3bf493cf7ed0c2b3df728977a257e0d99b4db1c6
- https://git.kernel.org/stable/c/b7dc03e09313d22a6d230b759de3b05d504c008f
- https://git.kernel.org/stable/c/3857238de6bce6c1573e8cb86c37b067e5208f05
- https://git.kernel.org/stable/c/412a6ceb56d501ef2f8202e26ab4b5d4dfbca566