Subject: Re: [net-next 4/4] e1000e: allocate ring descriptors with dma_zalloc_coherent

From: Eric Dumazet <[email-masked]>
Date: Mon, 05 Mar 2018 10:23:43 -0800

On Mon, 2018-03-05 at 10:16 -0800, Jeff Kirsher wrote:
> From: Pierre-Yves Kerbrat <[email-masked]>
> 
> Descriptor rings were not initialized at zero when allocated
> When area contained garbage data, it caused skb_over_panic in
> e1000_clean_rx_irq (if data had E1000_RXD_STAT_DD bit set)
> 
> This patch makes use of dma_zalloc_coherent to make sure the
> ring is memset at 0 to prevent the area from containing garbage.
> 

This looks like a net candidate, fixing a bug, with 0 chance adding a
regression IMO.