| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2021-47410: drm/amdkfd: fix svm_migrate_fini warning |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amdkfd: fix svm_migrate_fini warning |
| |
| Device manager releases device-specific resources when a driver |
| disconnects from a device, devm_memunmap_pages and |
| devm_release_mem_region calls in svm_migrate_fini are redundant. |
| |
| It causes below warning trace after patch "drm/amdgpu: Split |
| amdgpu_device_fini into early and late", so remove function |
| svm_migrate_fini. |
| |
| BUG: https://gitlab.freedesktop.org/drm/amd/-/issues/1718 |
| |
| WARNING: CPU: 1 PID: 3646 at drivers/base/devres.c:795 |
| devm_release_action+0x51/0x60 |
| Call Trace: |
| ? memunmap_pages+0x360/0x360 |
| svm_migrate_fini+0x2d/0x60 [amdgpu] |
| kgd2kfd_device_exit+0x23/0xa0 [amdgpu] |
| amdgpu_amdkfd_device_fini_sw+0x1d/0x30 [amdgpu] |
| amdgpu_device_fini_sw+0x45/0x290 [amdgpu] |
| amdgpu_driver_release_kms+0x12/0x30 [amdgpu] |
| drm_dev_release+0x20/0x40 [drm] |
| release_nodes+0x196/0x1e0 |
| device_release_driver_internal+0x104/0x1d0 |
| driver_detach+0x47/0x90 |
| bus_remove_driver+0x7a/0xd0 |
| pci_unregister_driver+0x3d/0x90 |
| amdgpu_exit+0x11/0x20 [amdgpu] |
| |
| The Linux kernel CVE team has assigned CVE-2021-47410 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.14.11 with commit ac7d732b24f4061f8a732ada49b054ab38c63e15 |
| Fixed in 5.15 with commit 197ae17722e989942b36e33e044787877f158574 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2021-47410 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/gpu/drm/amd/amdkfd/kfd_device.c |
| drivers/gpu/drm/amd/amdkfd/kfd_migrate.c |
| drivers/gpu/drm/amd/amdkfd/kfd_migrate.h |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/ac7d732b24f4061f8a732ada49b054ab38c63e15 |
| https://git.kernel.org/stable/c/197ae17722e989942b36e33e044787877f158574 |
