Re: [REGRESSION] Commit 447cbe95ebb9 causes IOMMU DMA faults on macvlan/vlan with bnxt_en

Le lun. 5 oct. 2026 à 11:44, Fabian Grünbichler
[off-list ref] a écrit :

On October 5, 2026 3:59 am, Eric Dumazet wrote:

quoted

On 10/5/26 00:29, Michael Chan wrote:

quoted

I think skb->len is not updated with the padded length here.  So the
HW will drop the packet seeing that the length is too short.  There is
another skb_put_padto() that might work better?

+1 Exactly, thanks!

FWIW, we suspect we have quite a few users running into this since
importing upstream changes from 7.2.2-7.2.5.

Will report back once we've provided those users with a kernel with the
below diff.

Patch has been sent for review:

https://lore.kernel.org/netdev/20261005023812.130639-1-edumazet@kernel.org/ (local)