K 10
svn:author
V 4
tijl
K 8
svn:date
V 27
2018-11-20T14:18:57.276862Z
K 7
svn:log
V 365
Fix another user address dereference in linux_sendmsg syscall.

This was hidden behind the LINUX_CMSG_NXTHDR macro which dereferences its
second argument.  Stop using the macro as well as LINUX_CMSG_FIRSTHDR.  Use
the size field of the kernel copy of the control message header to obtain
the next control message.

PR:		217901
MFC after:	2 days
X-MFC-With:	r340631

END