K 10
svn:author
V 5
trasz
K 8
svn:date
V 27
2020-07-05T10:57:28.369243Z
K 7
svn:log
V 461
Fix Linux recvmsg(2) when msg_namelen returned is 0.  Previously
it would fail with EINVAL, breaking some of the Python regression
tests.

While here, cap the user-controlled message length.

Note that the code doesn't seem to be copying out the new length
in either (success or failure) case. This will be addressed separately.

Reviewed by:	kib
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D25392

END