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

USB: misc: uss720: unregister parport on probe failure

uss720_probe() registers a parport before reading the 1284 register used
to detect unsupported Belkin F5U002 adapters. If get_1284_register()
fails, the error path drops the driver private data and the USB device
reference, but leaves the parport device registered.

Leaving the port registered is more than a private allocation leak:
parport_register_port() has already reserved a parport number and
registered the parport bus device, while pp->private_data still points at
the private data that the common error path is about to release.

Undo the pre-announce registration in the get_1284_register() failure
branch before jumping to the common private-data cleanup path. Clear
priv->pp first, matching the disconnect path and avoiding a stale pointer
in the private data.

This issue was identified during our ongoing static-analysis research while
reviewing kernel code.

https://git.kernel.org/stable/c/0b3073f40cc9f95d5ff0037eb0a06f5c1725a7ea

https://git.kernel.org/stable/c/1712fd71a5aaf81e47c747f180535fa963ad7830

https://git.kernel.org/stable/c/48dd0b2ec9f2e97c486eb68cd0a64b25c1c3df3e

https://git.kernel.org/stable/c/5e62d7857fd51b908b8371062ee839739a086bbe

https://git.kernel.org/stable/c/6bbb98bec71b577fda4f4b48f7aea5874b04a576

https://git.kernel.org/stable/c/729b68a5bad71220ae0914c8bdab9488ad5be6c8

https://git.kernel.org/stable/c/93563243377f8e9b46cc94d9c4f06533dd31b141

https://git.kernel.org/stable/c/b4ecbdc4f8830f5586c4a5cfc384c00f20f8f8b3

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