| 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-2024-57844: drm/xe: Fix fault on fd close after unbind |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/xe: Fix fault on fd close after unbind |
| |
| If userspace holds an fd open, unbinds the device and then closes it, |
| the driver shouldn't try to access the hardware. Protect it by using |
| drm_dev_enter()/drm_dev_exit(). This fixes the following page fault: |
| |
| <6> [IGT] xe_wedged: exiting, ret=98 |
| <1> BUG: unable to handle page fault for address: ffffc901bc5e508c |
| <1> #PF: supervisor read access in kernel mode |
| <1> #PF: error_code(0x0000) - not-present page |
| ... |
| <4> xe_lrc_update_timestamp+0x1c/0xd0 [xe] |
| <4> xe_exec_queue_update_run_ticks+0x50/0xb0 [xe] |
| <4> xe_exec_queue_fini+0x16/0xb0 [xe] |
| <4> __guc_exec_queue_fini_async+0xc4/0x190 [xe] |
| <4> guc_exec_queue_fini_async+0xa0/0xe0 [xe] |
| <4> guc_exec_queue_fini+0x23/0x40 [xe] |
| <4> xe_exec_queue_destroy+0xb3/0xf0 [xe] |
| <4> xe_file_close+0xd4/0x1a0 [xe] |
| <4> drm_file_free+0x210/0x280 [drm] |
| <4> drm_close_helper.isra.0+0x6d/0x80 [drm] |
| <4> drm_release_noglobal+0x20/0x90 [drm] |
| |
| (cherry picked from commit 4ca1fd418338d4d135428a0eb1e16e3b3ce17ee8) |
| |
| The Linux kernel CVE team has assigned CVE-2024-57844 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.12 with commit 514447a1219021298329ce586536598c3b4b2dc0 and fixed in 6.12.9 with commit 924d43bd10a1f6723ac5181a6e6cc2196ba98cdd |
| Issue introduced in 6.12 with commit 514447a1219021298329ce586536598c3b4b2dc0 and fixed in 6.13 with commit fe39b222a4139354d32ff9d46b88757f63f71d63 |
| |
| 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-2024-57844 |
| 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/xe/xe_exec_queue.c |
| |
| |
| 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/924d43bd10a1f6723ac5181a6e6cc2196ba98cdd |
| https://git.kernel.org/stable/c/fe39b222a4139354d32ff9d46b88757f63f71d63 |
