CVE-2024-42085: usb: dwc3: core: remove lock of otg mode during gadget suspend/resume to avoid deadlock
First published: Mon Jul 29 2024(Updated: )
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 ("usb: 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("usb: 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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=5.15.128<5.15.162 | |
| Linux Linux kernel | >=6.1<6.1.97 | |
| Linux Linux kernel | >=6.2<6.6.37 | |
| Linux Linux kernel | >=6.7<6.9.8 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.9-1 6.11.10-1 |
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Reference Links
- https://git.kernel.org/stable/c/17e2956633ca560b95f1cbbb297cfc2adf650649
- https://git.kernel.org/stable/c/7026576e89094aa9a0062aa6d10cba18aa99944c
- https://git.kernel.org/stable/c/7838de15bb700c2898a7d741db9b1f3cbc86c136
- https://git.kernel.org/stable/c/d77e2b5104c51d3668b9717c825a4a06998efe63
- https://git.kernel.org/stable/c/f1274cfab183e69a7c7bafffcb4f50703c876276
- https://git.kernel.org/linus/7838de15bb700c2898a7d741db9b1f3cbc86c136
- https://security-tracker.debian.org/tracker/CVE-2024-42085
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-42085
- https://nvd.nist.gov/vuln/detail/CVE-2024-42085
- https://launchpad.net/bugs/cve/CVE-2024-42085
- https://ubuntu.com/security/CVE-2024-42085
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