On Thu, Apr 18, 2013 at 05:26:26PM +0100, Ben Hutchings wrote: > On Thu, 2013-04-18 at 12:31 +0200, Patrick McHardy wrote: > > On Wed, Apr 17, 2013 at 11:57:43PM +0100, Ben Hutchings wrote: > > > On Wed, 2013-04-17 at 18:47 +0200, Patrick McHardy wrote: > > > > Add support for mmap'ed sendmsg() to netlink. Since the kernel validates > > > > received messages before processing them, the code makes sure userspace > > > > can't modify the message contents after invoking sendmsg(). To do that > > > > only a single mapping of the TX ring is allowed to exist and the socket > > > > must not be shared. If either of these two conditions does not hold, it > > > > falls back to copying. > > > [...] > > > > > > Is this resistant against copy_to_process()? > > > > I don't know, there's no copy_to_process() function is the tree I'm using. > > Sorry, I mean process_vm_writev(). copy_to_process() was the name in an > earlier version of CMA. I'm not sure whether process_vm_writev() allows to write to a memory mapped area and, if so, whether it would invoke vm_ops->open() before doing so. I'm looking into that, thanks. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
