Re: [PATCH] net: winbond-840: release IRQ on alloc_ringdesc() error path

[Andrew Lunn]

On Fri, Oct 09, 2026 at 12:21:09AM +0800, Haotian Zhang wrote:
> netdev_open() registers the shared IRQ with request_irq() and then calls
> alloc_ringdesc().  When alloc_ringdesc() fails, the error path jumps to
> out_err, which only calls netif_device_attach() and returns.  The IRQ
> handler stays registered forever: net/core/dev.c never calls ndo_stop
> when ndo_open fails, so netdev_close(), the only place that frees the
> IRQ, is never reached.  The leaked handler is also left enabled on an
> uninitialised device.
> 
> Add a separate out_err_free_irq label that releases the IRQ before
> returning the allocation error, mirroring the cleanup already used by
> the sibling de2104x driver.

Please set the subject line correctly:

https://www.kernel.org/doc/html/latest/process/maintainer-netdev.html

> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")

This obviously does not bother anybody, or it would of been fixed by
now. Please post this to net-next.

You might want to concentrate on drivers from the last decade?

    Andrew

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