[PATCH] knfsd: make sure svc_process call the correct pg_authenticate for multi-service port

If an RPC socket is serving multiple programs, then the pg_authenticate of
the first program in the list is called, instead of pg_authenticate for the
program to be run.

This does not cause a problem with any programs in the current kernel, but
could confuse future code.

Also set pg_authenticate for nfsd_acl_program incase it ever gets used.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 8 insertions, 5 deletions

diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 0568ff8565b1..89ed04696865 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -427,6 +427,7 @@ static struct svc_program	nfsd_acl_program = {
         .pg_name                = "nfsd",
         .pg_class               = "nfsd",
         .pg_stats               = &nfsd_acl_svcstats,
+        .pg_authenticate        = &svc_set_client,
 };
 
 static struct svc_stat  nfsd_acl_svcstats = {
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index e9bd91265f70..5a220b2bb376 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -313,6 +313,11 @@ svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
         rqstp->rq_proc = proc = ntohl(svc_getu32(argv));        /* procedure number */
 
         progp = serv->sv_program;
+
+        for (progp = serv->sv_program; progp; progp = progp->pg_next)
+                if (prog == progp->pg_prog)
+                        break;
+
         /*
          * Decode auth data, and add verifier to reply buffer.
          * We do this before anything else in order to get a decent
@@ -320,7 +325,7 @@ svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
          */
         auth_res = svc_authenticate(rqstp, &auth_stat);
         /* Also give the program a chance to reject this call: */
-        if (auth_res == SVC_OK) {
+        if (auth_res == SVC_OK && progp) {
                 auth_stat = rpc_autherr_badcred;
                 auth_res = progp->pg_authenticate(rqstp);
         }
@@ -340,10 +345,7 @@ svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
         case SVC_COMPLETE:
                 goto sendit;
         }
-                
-        for (progp = serv->sv_program; progp; progp = progp->pg_next)
-                if (prog == progp->pg_prog)
-                        break;
+
         if (progp == NULL)
                 goto err_bad_prog;