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Date: Sat, 23 Jun 2007 23:12:07 -0700 (PDT) From: David Miller <davem@...emloft.net> To: okir@....de Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] net: Make skb_seq_read unmap the last fragment From: Olaf Kirch <okir@....de> Date: Tue, 19 Jun 2007 09:56:24 +0200 > From: Olaf Kirch <olaf.kirch@...cle.com> > > Make skb_seq_read unmap the last fragment > > Having walked through the entire skbuff, skb_seq_read would leave the > last fragment mapped. As a consequence, the unwary caller would leak > kmaps, and proceed with preempt_count off by one. The only (kind of > non-intuitive) workaround is to use skb_seq_read_abort. > > This patch makes sure skb_seq_read always unmaps frag_data after having > cycled through the skb's paged part. > > Signed-off-by: olaf.kirch@...cle.com Thanks for finding and fixing this bug. Patch applied, thanks again Olaf. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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