netdev - Re: [PATCH] net: usb: pegasus: fix memory leak on usb_submit

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Message-ID: <38d73c63-7521-41ad-8d4d-03d5ba2288df@lunn.ch>
Date: Fri, 2 Jan 2026 23:02:53 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Petko Manolov <petko.manolov@...sulko.com>
Cc: Paolo Abeni <pabeni@...hat.com>, davem@...emloft.net,
	netdev@...r.kernel.org, kuba@...nel.org, stable@...r.kernel.org
Subject: Re: [PATCH] net: usb: pegasus: fix memory leak on usb_submit_urb()
 failure

> Sure, will do.  However, my v2 patch makes use of __free() cleanup
> functionality, which in turn only applies back to v6.6 stable kernels.

I would suggest not using the magical __free() cleanup.

https://www.kernel.org/doc/html/latest/process/maintainer-netdev.html#using-device-managed-and-cleanup-h-constructs

    Low level cleanup constructs (such as __free()) can be used when
    building APIs and helpers, especially scoped iterators. However,
    direct use of __free() within networking core and drivers is
    discouraged. Similar guidance applies to declaring variables
    mid-function.

    Andrew