K 10
svn:author
V 4
tijl
K 8
svn:date
V 27
2018-11-19T15:31:54.579186Z
K 7
svn:log
V 470
Do proper copyin of control message data in the Linux sendmsg syscall.

Instead of calling m_append with a user address, allocate an mbuf cluster
and copy data into it using copyin.  For the SCM_CREDS case, instead of
zeroing a stack variable and appending that to the mbuf, zero part of the
mbuf cluster directly.  One mbuf cluster is also the size limit used by
the FreeBSD sendmsg syscall (uipc_syscalls.c:sockargs()).

PR:		217901
Reviewed by:	kib
MFC after:	3 days

END