CVE-2025-21849

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm/i915/gt: Use spin_lock_irqsave() in interruptible context<br /> <br /> spin_lock/unlock() functions used in interrupt contexts could<br /> result in a deadlock, as seen in GitLab issue #13399,<br /> which occurs when interrupt comes in while holding a lock.<br /> <br /> Try to remedy the problem by saving irq state before spin lock<br /> acquisition.<br /> <br /> v2: add irqs&amp;#39; state save/restore calls to all locks/unlocks in<br /> signal_irq_work() execution (Maciej)<br /> <br /> v3: use with spin_lock_irqsave() in guc_lrc_desc_unpin() instead<br /> of other lock/unlock calls and add Fixes and Cc tags (Tvrtko);<br /> change title and commit message<br /> <br /> (cherry picked from commit c088387ddd6482b40f21ccf23db1125e8fa4af7e)