svn commit: r199359 - stable/7/sys/kern
Konstantin Belousov
kib at FreeBSD.org
Tue Nov 17 12:11:13 UTC 2009
Author: kib
Date: Tue Nov 17 12:11:12 2009
New Revision: 199359
URL: http://svn.freebsd.org/changeset/base/199359
Log:
MFC r199137:
Detect the slashdot lookup for RENAME or REMOVE in lookup(), and return
EINVAL.
Modified:
stable/7/sys/kern/vfs_lookup.c
Directory Properties:
stable/7/sys/ (props changed)
stable/7/sys/contrib/pf/ (props changed)
Modified: stable/7/sys/kern/vfs_lookup.c
==============================================================================
--- stable/7/sys/kern/vfs_lookup.c Tue Nov 17 12:09:21 2009 (r199358)
+++ stable/7/sys/kern/vfs_lookup.c Tue Nov 17 12:11:12 2009 (r199359)
@@ -464,6 +464,12 @@ dirloop:
else
cnp->cn_flags &= ~ISLASTCN;
+ if ((cnp->cn_flags & ISLASTCN) != 0 &&
+ cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.' &&
+ (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) {
+ error = EINVAL;
+ goto bad;
+ }
/*
* Check for degenerate name (e.g. / or "")
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