[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Xen-devel] Moving frags and SKBTX_DEV_ZEROCOPY skbs



Hi,

Recently I've investigated issues around SKBTX_DEV_ZEROCOPY skbs where the frags list were modified. I came across this function skb_shift(), which moves frags between skbs. And there are a lot more of such kind, skb_split or skb_try_coalesce, for example. It could be a dangerous thing if a frag is referenced from an skb which doesn't have the original destructor_arg, and to avoid that skb_orphan_frags should be called. Although probably these functions are not normally touched in usual usecases, I think it would be useful to review core skb functions proactively and add an skb_orphan_frags everywhere where the frags could be referenced from other places.
Any opinion about this?

Regards,

Zoltan

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel


 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.