CVE-2026-23357 Linux内核mcp251x驱动死锁漏洞

/* * Conceptual Proof of Concept for CVE-2026-23357 * Triggering the deadlock requires specific hardware timing. * This is a simplified representation of the logic flow. */ #include <linux/module.h> #include <linux/netdevice.h> // Hypothetical trigger function void trigger_deadlock_scenario(struct net_device *net) { // 1. Attempt to open the device (mcp251x_open) // Internally, this acquires mpc_lock. // 2. Simulate an error condition during open // This leads to the error path where free_irq is called // while holding mpc_lock. // 3. Simultaneously, an interrupt occurs (hardware dependent) // The IRQ handler tries to acquire mpc_lock. // Result: Deadlock. } /* * Fix Check: Verify that free_irq is called after mutex_unlock. */