Date: Tue, 17 Nov 2009 12:11:12 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org Subject: svn commit: r199359 - stable/7/sys/kern Message-ID: <200911171211.nAHCBCxB006216@svn.freebsd.org>
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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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