[PATCH] iommu: Fix NULL pointer deref when io_page_fault tracepoint fires

[Daniel Thompson]

On Fri, Jan 16, 2026 at 05:02:35PM +0100, Markus Elfring wrote:
> …
> > Fix this by adding logic to the tracepoint to safely propagate NULL.
>
> * How do you think about to add any tags (like “Fixes” and “Cc”) accordingly?

I could add a

Fixes: f8f934c180f6 ("iommu/arm-smmu: Add support for driver IOMMU fault handlers")

However, who do you think I neglected to Cc:?


> * Would a summary phrase like “Prevent null pointer dereference for a tracepoint”
>   be a bit nicer?

I don't understand what is wrong with the original phrasing. Can you
explain why this change matters to you?


Daniel.