CVE-2024-42085 (GCVE-0-2024-42085)
Vulnerability from cvelistv5
Published
2024-07-29 16:26
Modified
2026-05-23 15:51
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: f2bfd0a2a640ca2f308b6893a89cfb2ec31e8fde
Version: 2fa487a9466760a4fb6f147aed6219379dabfc2e
Version: 5265397f94424eaea596026fd34dc7acf474dcec
Version: 5265397f94424eaea596026fd34dc7acf474dcec
Version: 5265397f94424eaea596026fd34dc7acf474dcec
Version: 5265397f94424eaea596026fd34dc7acf474dcec
Version: 5.15.128   ≤
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc3: core: remove lock of otg mode during gadget suspend/resume to avoid deadlock\n\nWhen config CONFIG_USB_DWC3_DUAL_ROLE is selected, and trigger system\nto enter suspend status with below command:\necho mem \u003e /sys/power/state\nThere will be a deadlock issue occurring. Detailed invoking path as\nbelow:\ndwc3_suspend_common()\n    spin_lock_irqsave(\u0026dwc-\u003elock, flags);              \u003c-- 1st\n    dwc3_gadget_suspend(dwc);\n        dwc3_gadget_soft_disconnect(dwc);\n            spin_lock_irqsave(\u0026dwc-\u003elock, flags);      \u003c-- 2nd\nThis issue is exposed by commit c7ebd8149ee5 (\"usb: dwc3: gadget: Fix\nNULL pointer dereference in dwc3_gadget_suspend\") that removes the code\nof checking whether dwc-\u003egadget_driver is NULL or not. It causes the\nfollowing code is executed and deadlock occurs when trying to get the\nspinlock. In fact, the root cause is the commit 5265397f9442(\"usb: dwc3:\nRemove DWC3 locking during gadget suspend/resume\") that forgot to remove\nthe lock of otg mode. So, remove the redundant lock of otg mode during\ngadget suspend/resume."
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