lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Fri, 30 Nov 2007 11:14:43 -0800
From:	Roland Dreier <>
To:	Andrew Gallatin <>
Cc:	Herbert Xu <>,,,
Subject: Re: [PATCH]: fix lro_gen_skb() alignment

 > >> -       skb = netdev_alloc_skb(lro_mgr->dev, hlen);
 > >> +       skb = netdev_alloc_skb(lro_mgr->dev, hlen + NET_IP_ALIGN);
 > > NET_IP_ALIGN should only be used if you're DMAing into the skb head.
 > > Otherwise you should say 2.  It would be nice to have another macro
 > > for that I suppose.
 > It is certainly simple enough to say 2.  Thank you for pointing
 > this out.  I have attached a patch to do that..
 > Signed off by: Andrew Gallatin <>

Isn't the value of 2 ethernet-specific (to round the 14-byte header up
to 16)?  Given that the rest of the lro code is fairly careful to
calculate mac_hdr_len etc it seems as if it would be cleaner to make
this independent of the specific L2 being used.

(And I plan on using the LRO module for IP-over-InfiniBand so this is
not completely theoretical)

 - R.
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists