| 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-2024-46867: drm/xe/client: fix deadlock in show_meminfo() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/xe/client: fix deadlock in show_meminfo() |
| |
| There is a real deadlock as well as sleeping in atomic() bug in here, if |
| the bo put happens to be the last ref, since bo destruction wants to |
| grab the same spinlock and sleeping locks. Fix that by dropping the ref |
| using xe_bo_put_deferred(), and moving the final commit outside of the |
| lock. Dropping the lock around the put is tricky since the bo can go |
| out of scope and delete itself from the list, making it difficult to |
| navigate to the next list entry. |
| |
| (cherry picked from commit 0083b8e6f11d7662283a267d4ce7c966812ffd8a) |
| |
| The Linux kernel CVE team has assigned CVE-2024-46867 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.8 with commit 0845233388f8a26d00acf9bf230cfd4f36aa4c30 and fixed in 6.10.11 with commit 9d3de463e23bfb1ff1567a32b099b1b3e5286a48 |
| Issue introduced in 6.8 with commit 0845233388f8a26d00acf9bf230cfd4f36aa4c30 and fixed in 6.11 with commit 9bd7ff293fc84792514aeafa06c5a17f05cb5f4b |
| |
| 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-2024-46867 |
| 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_drm_client.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/9d3de463e23bfb1ff1567a32b099b1b3e5286a48 |
| https://git.kernel.org/stable/c/9bd7ff293fc84792514aeafa06c5a17f05cb5f4b |
