Spinlock Vulnerability in Xilinx GPIO Driver for Linux Kernel

CVE-2025-21684

Summary

The Xilinx GPIO Driver for the Linux kernel has a vulnerability where irq_chip functions can be incorrectly called in a raw spinlock context. This required the internal locking mechanism to also utilize a raw spinlock. The issue has led to problematic wait contexts that can result in system instability or unwanted behavior during interrupt handling. The fix ensures that the driver correctly handles lock acquisition and context management, enhancing the reliability and security of the GPIO interface.

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