In the Linux kernel, the following vulnerability has been resolved:

usb: dwc3: run gadget disconnect from sleepable suspend context

dwc3_gadget_suspend() takes dwc->lock with IRQs disabled and then calls
dwc3_disconnect_gadget().  For async callbacks that helper only uses
plain spin_unlock()/spin_lock(), so the gadget ->disconnect() callback
still runs with IRQs disabled and any sleepable callback trips Lockdep.

This issue was found by our static analysis tool and then manually
reviewed against the current tree.

The grounded PoC kept the dwc3_gadget_suspend() ->
dwc3_disconnect_gadget() -> gadget_driver->disconnect() chain, and
Lockdep reported:

  BUG: sleeping function called from invalid context
  gadget_disconnect+0x21/0x39 [vuln_msv]
  dwc3_gadget_suspend.constprop.0+0x2b/0x42 [vuln_msv]

Keep the disconnect callback selection in one common helper, but add a
sleepable suspend-side wrapper which snapshots the callback under
dwc->lock and then runs it after spin_unlock_irqrestore().  The regular
event path still uses the existing spin_unlock()/spin_lock() window.

https://git.kernel.org/stable/c/010382937fb69892b3469ac4d30af072262f59e8

https://git.kernel.org/stable/c/48958478cb8dbc429a5b19f36e866b63d6297d1d

https://git.kernel.org/stable/c/5e5798880eb1533a7de6fb68eb14b2d8202ebf76

https://git.kernel.org/stable/c/642e04f5c292d04070ae6e4374fbf14cc40a2465

https://git.kernel.org/stable/c/b399be2958456efe1b64b19c55a54a24e9035769

https://git.kernel.org/stable/c/c4e232bd07fe2b69a6e5c380db41dd36b95e0524

https://git.kernel.org/stable/c/e0e4f15d4225fb7156cc0e3c21eb8953114f9b89

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