Konstantin Belousov dc1d2cc648 Fix a bug in r357199.
Around a generic call to null_nodeget(), there is nothing that would
prevent the unmount of the nullfs mp until we process to the
insmntque1() point.  Calculate the VV_ROOT flag after insmntque1() to
not access mp->mnt_data before we have an exclusively locked vnode
from this mount point on the mp vnode list.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2020-01-30 19:34:37 +00:00
..
2019-12-16 00:06:22 +00:00
2020-01-13 21:49:27 +00:00
2020-01-30 19:34:37 +00:00