From: "J. Bruce Fields" <bfields@redhat.com>
Date: Wed, 13 Jun 2018 15:21:35 -0400
Subject: [PATCH] nfsd: fix corrupted reply to badly ordered compound
Git-commit: 5b7b15aee641904ae269be9846610a3950cbd64c
Patch-mainline: v4.19
References: git-fixes

We're encoding a single op in the reply but leaving the number of ops
zero, so the reply makes no sense.

Somewhat academic as this isn't a case any real client will hit, though
in theory perhaps that could change in a future protocol extension.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Acked-by: NeilBrown <neilb@suse.com>

---
 fs/nfsd/nfs4proc.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1719,6 +1719,7 @@ nfsd4_proc_compound(struct svc_rqst *rqs
 	if (status) {
 		op = &args->ops[0];
 		op->status = status;
+		resp->opcnt = 1;
 		goto encode_op;
 	}