avoid uninitialised var use in nfs_serv.c error paths

some functions have a nfsmout label with code that assumes NDINIT has
been called

nfsrv_rename has two NDINIT calls, the nfsmout code assumes both are
setup but is only jumped to when none/one is setup

found with llvm scan-build
checked by deraadt@ beck@, ok miod@

diff --git a/sys/nfs/nfs_serv.c b/sys/nfs/nfs_serv.c
index b03d4a5..74e7fed 100644 (file)
--- a/sys/nfs/nfs_serv.c
+++ b/sys/nfs/nfs_serv.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: nfs_serv.c,v 1.126 2024/05/01 13:15:59 jsg Exp $      */
+/*     $OpenBSD: nfs_serv.c,v 1.127 2024/08/17 07:02:13 jsg Exp $      */
 /*     $NetBSD: nfs_serv.c,v 1.34 1997/05/12 23:37:12 fvdl Exp $       */
 
 /*
@@ -1038,12 +1038,12 @@ nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
        if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
                return 0;
        else if (error != 0)
-               goto nfsmout;
+               return error;
        fhp = &nfh.fh_generic;
        if (nfsm_srvmtofh2(&info, fhp) != 0)
-               goto nfsmout;
+               return error;
        if (nfsm_srvnamesiz(&info, &len) != 0)
-               goto nfsmout;
+               return error;
        if (error) {
                if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
                        return 0;
@@ -1325,12 +1325,12 @@ nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
        if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
                return 0;
        else if (error != 0)
-               goto nfsmout;
+               return error;
        fhp = &nfh.fh_generic;
        if (nfsm_srvmtofh2(&info, fhp) != 0)
-               goto nfsmout;
+               return error;
        if (nfsm_srvnamesiz(&info, &len) != 0)
-               goto nfsmout;
+               return error;
        if (error) {
                if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
                        return 0;
@@ -1598,12 +1598,12 @@ nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
        if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
                return 0;
        else if (error != 0)
-               goto nfsmout;
+               return error;
        ffhp = &fnfh.fh_generic;
        if (nfsm_srvmtofh2(&info, ffhp) != 0)
-               goto nfsmout;
+               return error;
        if (nfsm_srvnamesiz(&info, &len) != 0)
-               goto nfsmout;
+               return error;
        if (error) {
                if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
                        return 0;
@@ -1757,12 +1757,6 @@ out1:
 nfsmout:
        if (fdirp)
                vrele(fdirp);
-       if (tdirp)
-               vrele(tdirp);
-       if (tond.ni_cnd.cn_nameiop) {
-               vrele(tond.ni_startdir);
-               pool_put(&namei_pool, tond.ni_cnd.cn_pnbuf);
-       }
        if (fromnd.ni_cnd.cn_nameiop) {
                if (fromnd.ni_startdir)
                        vrele(fromnd.ni_startdir);
@@ -1928,12 +1922,12 @@ nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
        if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
                return 0;
        else if (error != 0)
-               goto nfsmout;
+               return error;
        fhp = &nfh.fh_generic;
        if (nfsm_srvmtofh2(&info, fhp) != 0)
-               goto nfsmout;
+               return error;
        if (nfsm_srvnamesiz(&info, &len) != 0)
-               goto nfsmout;
+               return error;
        if (error) {
                if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
                        return 0;
@@ -2088,12 +2082,12 @@ nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
        if (nfsm_srvmtofh1(&info, nfsd, slp, mrq) != 0)
                return 0;
        else if (error != 0)
-               goto nfsmout;
+               return error;
        fhp = &nfh.fh_generic;
        if (nfsm_srvmtofh2(&info, fhp) != 0)
-               goto nfsmout;
+               return error;
        if (nfsm_srvnamesiz(&info, &len) != 0)
-               goto nfsmout;
+               return error;
        if (error) {
                if (nfsm_reply(&info, nfsd, slp, mrq, error, 0) != 0)
                        return 0;