Re: [PATCH net] net: emac: mal: replace devm_request_irq with request_irq to fix probe error race

[Andrew Lunn]

On Thu, Jul 02, 2026 at 04:50:45PM -0700, Rosen Penev wrote:
> devm_request_irq() is a managed resource: the IRQ is not freed until
> devres_release_all() runs after the probe function returns.  In the
> probe error path, free_netdev(mal->dummy_dev) and dcr_unmap() execute
> while the IRQ is still live.  If the shared IRQ fires during cleanup,
> the handler accesses unmapped DCR registers (crash) or the already-
> freed dummy_dev (use-after-free).
> 
> Switch to plain request_irq() with per-IRQ error labels that tear down
> only the IRQs that were successfully registered, and add the matching
> free_irq() calls in mal_remove().
> 
> Fixes: 14f59154ff0b ("net: ibm: emac: mal: use devm for request_irq")
> Assisted-by: opencode:big-pickle
> Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>

You seemed to of sent the same patch within 24 hours. Please don't do
that.

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

Send a self NACK to the broken version, wait 24 hours, and send v2.

    Andrew

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