Re: [PATCH] nvme-pci: fix parameter order in nvme_free_sgls() call

[Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

On Wed, Jan 28, 2026 at 07:59:05AM -0700, Keith Busch wrote:
> On Tue, Jan 27, 2026 at 08:59:06PM +0100, Roger Pau Monne wrote:
> > The call to nvme_free_sgls() in nvme_unmap_data() has the sg_list and sge
> > parameters swapped.  This wasn't noticed by the compiler because both share
> > the same type.  On a Xen PV hardware domain, and possibly any other
> > architectures that takes that path, this leads to corruption of the NVMe
> > contents.

On Wed, Jan 28, 2026 at 09:49:58AM +0100, Christoph Hellwig wrote:
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>
> 
> but maybe we can reword the subject to sound less harmless, e.g.:
> 
> nvme-pci: DMA unmap the correct regions in nvme_free_sgls

On Wed, Jan 28, 2026 at 07:59:05AM -0700, Keith Busch wrote:
> Thanks, applied to nvme-6.19 with updated subject.

Hi,

I think this wants to be included in v6.18 too, as it also has the
faulty commit. And indeed, I do hit this issue when running 6.18.38.

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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