CVE-2024-42085 Information

Description

In the Linux kernel the following vulnerability has been resolved:

usb: dwc3: core: remove lock of otg mode during gadget suspend/resume to avoid deadlock

When config CONFIG_USB_DWC3_DUAL_ROLE is selected and trigger system to enter suspend status with below command: echo mem > /sys/power/state There will be a deadlock issue occurring. Detailed invoking path as below: dwc3_suspend_common() spin_lock_irqsave(&dwc->lock flags); <– 1st dwc3_gadget_suspend(dwc); dwc3_gadget_soft_disconnect(dwc); spin_lock_irqsave(&dwc->lock flags); <– 2nd This issue is exposed by commit c7ebd8149ee5 (�sb: dwc3: gadget: Fix NULL pointer dereference in dwc3_gadget_suspend) that removes the code of checking whether dwc->gadget_driver is NULL or not. It causes the following code is executed and deadlock occurs when trying to get the spinlock. In fact the root cause is the commit 5265397f9442(�sb: dwc3: Remove DWC3 locking during gadget suspend/resume) that forgot to remove the lock of otg mode. So remove the redundant lock of otg mode during gadget suspend/resume.

Reference

https://git.kernel.org/stable/c/7026576e89094aa9a0062aa6d10cba18aa99944c https://git.kernel.org/stable/c/d77e2b5104c51d3668b9717c825a4a06998efe63 https://git.kernel.org/stable/c/17e2956633ca560b95f1cbbb297cfc2adf650649 https://git.kernel.org/stable/c/f1274cfab183e69a7c7bafffcb4f50703c876276 https://git.kernel.org/stable/c/7838de15bb700c2898a7d741db9b1f3cbc86c136