lkml.org 
[lkml]   [2010]   [Jul]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Fwd: Possible bug in net/ipv4/route.c?
From
Date
Le lundi 05 juillet 2010 à 21:22 +0800, Herbert Xu a écrit :
> On Mon, Jul 05, 2010 at 02:59:14PM +0200, Eric Dumazet wrote:
> >
> > Why do we clear full 48 bytes skb->cb[] in skb_alloc(), if no protocol
> > stack should rely it being zero ?
>
> Unless a protocol is allocating the skb itself, then the fact
> that skb_alloc clears skb->cb is no guarantee that the skb->cb
> will be zero.

I see. We could :

Avoid this memset(skb->cb, 0, sizeof(skb->cb)) in fastpath.

or in debug mode, poison it to trigger errors more often.

Thanks


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2010-07-05 15:37    [W:0.077 / U:0.296 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site