Author: kib
Date: Mon Apr 1 09:59:38 2013
New Revision: 248969
URL: http://svnweb.freebsd.org/changeset/base/248969
Log:
Do not call the VOP_LOOKUP() for the doomed directory vnode. The
vnode could be reclaimed while lock upgrade was performed.
Sponsored by: The FreeBSD Foundation
Reported and tested by: pho
Diagnosed and reviewed by: rmacklem
MFC after: 1 week
Modified:
head/sys/kern/vfs_lookup.c
Modified: head/sys/kern/vfs_lookup.c
==============================================================================
--- head/sys/kern/vfs_lookup.c Mon Apr 1 09:57:46 2013 (r248968)
+++ head/sys/kern/vfs_lookup.c Mon Apr 1 09:59:38 2013 (r248969)
@@ -698,6 +698,10 @@ unionlookup:
VOP_ISLOCKED(dp) == LK_SHARED &&
(cnp->cn_flags & ISLASTCN) && (cnp->cn_flags & LOCKPARENT))
vn_lock(dp, LK_UPGRADE|LK_RETRY);
+ if ((dp->v_iflag & VI_DOOMED) != 0) {
+ error = ENOENT;
+ goto bad;
+ }
/*
* If we're looking up the last component and we need an exclusive
* lock, adjust our lkflags.
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