CVE-2024-46791

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open<br /> <br /> The mcp251x_hw_wake() function is called with the mpc_lock mutex held and<br /> disables the interrupt handler so that no interrupts can be processed while<br /> waking the device. If an interrupt has already occurred then waiting for<br /> the interrupt handler to complete will deadlock because it will be trying<br /> to acquire the same mutex.<br /> <br /> CPU0 CPU1<br /> ---- ----<br /> mcp251x_open()<br /> mutex_lock(&amp;priv-&gt;mcp_lock)<br /> request_threaded_irq()<br /> <br /> mcp251x_can_ist()<br /> mutex_lock(&amp;priv-&gt;mcp_lock)<br /> mcp251x_hw_wake()<br /> disable_irq()