K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2020-04-28T15:02:44.149256Z
K 7
svn:log
V 462
Make sendfile(SF_SYNC)'s CV wait interruptible.

Otherwise, since the CV is not signalled until data is drained from the
socket, it is trivial to create an unkillable process using
sendfile(SF_SYNC) and a process-private PF_LOCAL socket pair.  In
particular, the cv_wait() in sendfile() does not get interrupted until
data is drained from the receiving socket buffer.

Reported by:	pho
Discussed with:	kib
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation

END