CVS commit: src/sys/kern

["Andrew Doran" <ad%netbsd.org@localhost>]

Module Name:    src
Committed By:   ad
Date:           Mon Jun 15 18:44:10 UTC 2020

Modified Files:
        src/sys/kern: vfs_lookup.c

Log Message:
lookup_fastforward():

- If the root vnode of a mount is being reclaimed concurrent to a lookup,
  it's possbile to become confounded and bail out of the loop with both
  foundobj=NULL and searchdir=NULL (causing a NULL pointer deref).  If that
  happens everything should be rolled back to the start for retry.  Problem
  found and debugged by hannken@.

- If the terminal node was !VDIR then searchdir was needlessly referenced.
  No functional impact.


To generate a diff of this commit:
cvs rdiff -u -r1.223 -r1.224 src/sys/kern/vfs_lookup.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.