svn commit: r196297 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Pawel Jakub Dawidek]

Author: pjd
Date: Mon Aug 17 09:13:22 2009
New Revision: 196297
URL: http://svn.freebsd.org/changeset/base/196297

Log:
  Fix panic in zfs recv code. The last vnode (mountpoint's vnode) can have
  0 usecount.
  
  Reported by:	Thomas Backman <serenity at exscape.org>
  Approved by:	re (kib)

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c	Mon Aug 17 09:03:47 2009	(r196296)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c	Mon Aug 17 09:13:22 2009	(r196297)
@@ -917,7 +917,7 @@ zfsvfs_teardown(zfsvfs_t *zfsvfs, boolea
 	for (zp = list_head(&zfsvfs->z_all_znodes); zp != NULL;
 	    zp = list_next(&zfsvfs->z_all_znodes, zp))
 		if (zp->z_dbuf) {
-			ASSERT(ZTOV(zp)->v_count > 0);
+			ASSERT(ZTOV(zp)->v_count >= 0);
 			zfs_znode_dmu_fini(zp);
 		}
 	mutex_exit(&zfsvfs->z_znodes_lock);