CVE-2025-21849

CVE-2025-21849: Linux kernel drm/i915/gt had potential deadlocks due to spin_lock/unlock() used in interrupt contexts. The fix saves irq state before acquiring locks. Version history shows v2 adds irq state save/restore around signal_irq_work locks; v3 uses spin_lock_irqsave() in guc_lrc_desc_unp...