From: Ben Hutchings <b...@decadent.org.uk> Date: Sun, 13 Apr 2014 23:57:40 +0100
> From: "Michael S. Tsirkin" <m...@redhat.com> > > commit 1fd819ecb90cc9b822cd84d3056ddba315d3340f upstream. > > skb_segment copies frags around, so we need > to copy them carefully to avoid accessing > user memory after reporting completion to userspace > through a callback. > > skb_segment doesn't normally happen on datapath: > TSO needs to be disabled - so disabling zero copy > in this case does not look like a big deal. > > Signed-off-by: Michael S. Tsirkin <m...@redhat.com> > Acked-by: Herbert Xu <herb...@gondor.apana.org.au> > Signed-off-by: David S. Miller <da...@davemloft.net> > [bwh: Backported to 3.2. As skb_segment() only supports page-frags *or* a > frag list, there is no need for the additional frag_skb pointer or the > preparatory renaming.] > Signed-off-by: Ben Hutchings <b...@decadent.org.uk> > --- > For branches older than 3.6, commit a353e0ce0fd4 ('skbuff: add an api to > orphan frags') is needed before this. This is untested and I would > appreciate a review. I didn't do this backport because it seemed risky unless Michael or someone else tested it thoroughly. -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html