| 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-2025-21849: drm/i915/gt: Use spin_lock_irqsave() in interruptible context |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/i915/gt: Use spin_lock_irqsave() in interruptible context |
| |
| spin_lock/unlock() functions used in interrupt contexts could |
| result in a deadlock, as seen in GitLab issue #13399, |
| which occurs when interrupt comes in while holding a lock. |
| |
| Try to remedy the problem by saving irq state before spin lock |
| acquisition. |
| |
| v2: add irqs' state save/restore calls to all locks/unlocks in |
| signal_irq_work() execution (Maciej) |
| |
| v3: use with spin_lock_irqsave() in guc_lrc_desc_unpin() instead |
| of other lock/unlock calls and add Fixes and Cc tags (Tvrtko); |
| change title and commit message |
| |
| (cherry picked from commit c088387ddd6482b40f21ccf23db1125e8fa4af7e) |
| |
| The Linux kernel CVE team has assigned CVE-2025-21849 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.9 with commit 2f2cc53b5fe7022f3ae602eb24573d52f8740959 and fixed in 6.12.17 with commit 2bf1f4c129db7a10920655b000f0292f1ee509c2 |
| Issue introduced in 6.9 with commit 2f2cc53b5fe7022f3ae602eb24573d52f8740959 and fixed in 6.13.5 with commit 47ae46ac5407646420e06b78e0dad331e56a4bb4 |
| Issue introduced in 6.9 with commit 2f2cc53b5fe7022f3ae602eb24573d52f8740959 and fixed in 6.14 with commit e49477f7f78598295551d486ecc7f020d796432e |
| |
| 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-2025-21849 |
| 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/i915/gt/uc/intel_guc_submission.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/2bf1f4c129db7a10920655b000f0292f1ee509c2 |
| https://git.kernel.org/stable/c/47ae46ac5407646420e06b78e0dad331e56a4bb4 |
| https://git.kernel.org/stable/c/e49477f7f78598295551d486ecc7f020d796432e |
