Date: Mon, 1 Apr 2013 09:59:38 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r248969 - head/sys/kern Message-ID: <201304010959.r319xc5L015746@svn.freebsd.org>
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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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