netdev - Re: [RESEND][PATCH] Fix MACsec kernel panics, oopses and bugs

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Date:   Thu, 23 May 2019 09:11:06 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     ast@...dv.de
Cc:     netdev@...r.kernel.org
Subject: Re: [RESEND][PATCH] Fix MACsec kernel panics, oopses and bugs

From: Andreas Steinmetz <ast@...dv.de>
Date: Thu, 23 May 2019 09:46:15 +0200

> MACsec causes oopses followed by a kernel panic when attached directly or indirectly to a bridge. It causes erroneous
> checksum messages when attached to vxlan. When I did investigate I did find skb leaks, apparent skb mis-handling and
> superfluous code. The attached patch fixes all MACsec misbehaviour I could find. As I am no kernel developer somebody
> with sufficient kernel network knowledge should verify and correct the patch where necessary.
> 
> Signed-off-by: Andreas Steinmetz <ast@...dv.de>

Subject lines should be of the form:

[PATCH $DST_TREE] $subsystem_prefix: Description.

Where $DST_TREE here would be "net" and $subsystem_prefix would be "macsec".

> +	/* FIXME: any better way to prevent calls to netdev_rx_csum_fault? */
> +	skb->csum_complete_sw = 1;

Create a helper for this in linux/skbuff.h with very clear and clean comments
explaining what is going on.