Date: Fri, 27 May 2016 23:15:58 +0000 (UTC) From: Rick Macklem <rmacklem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r300887 - stable/9/sys/fs/nfsserver Message-ID: <201605272315.u4RNFwFB003061@repo.freebsd.org>
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Author: rmacklem Date: Fri May 27 23:15:58 2016 New Revision: 300887 URL: https://svnweb.freebsd.org/changeset/base/300887 Log: MFC: r299514 Fix use-after-free in NFS4 lock test service. Trivial use-after-free where stp was freed too soon in the non-error path. To fix, simply move its release to the end of the routine. Modified: stable/9/sys/fs/nfsserver/nfs_nfsdserv.c Directory Properties: stable/9/sys/ (props changed) stable/9/sys/fs/ (props changed) Modified: stable/9/sys/fs/nfsserver/nfs_nfsdserv.c ============================================================================== --- stable/9/sys/fs/nfsserver/nfs_nfsdserv.c Fri May 27 23:03:44 2016 (r300886) +++ stable/9/sys/fs/nfsserver/nfs_nfsdserv.c Fri May 27 23:15:58 2016 (r300887) @@ -2395,8 +2395,6 @@ nfsrvd_lockt(struct nfsrv_descript *nd, if (!nd->nd_repstat) nd->nd_repstat = nfsrv_lockctrl(vp, &stp, &lop, &cf, clientid, &stateid, exp, nd, p); - if (stp) - FREE((caddr_t)stp, M_NFSDSTATE); if (nd->nd_repstat) { if (nd->nd_repstat == NFSERR_DENIED) { NFSM_BUILD(tl, u_int32_t *, 7 * NFSX_UNSIGNED); @@ -2418,6 +2416,8 @@ nfsrvd_lockt(struct nfsrv_descript *nd, } } vput(vp); + if (stp) + FREE((caddr_t)stp, M_NFSDSTATE); NFSEXITCODE2(0, nd); return (0); nfsmout:
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