[PATCH 5.10 077/199] nfsd: Dont set eof on a truncated READ_PLUS

[Greg Kroah-Hartman]

From: Trond Myklebust <trond.mykleb...@hammerspace.com>

[ Upstream commit b68f0cbd3f95f2df81e525c310a41fc73c2ed0d3 ]

If the READ_PLUS operation was truncated due to an error, then ensure we
clear the 'eof' flag.

Fixes: 9f0b5792f07d ("NFSD: Encode a full READ_PLUS reply")
Signed-off-by: Trond Myklebust <trond.mykleb...@hammerspace.com>
Signed-off-by: Chuck Lever <chuck.le...@oracle.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 fs/nfsd/nfs4xdr.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 26f6e277101de..5f5169b9c2e90 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -4736,14 +4736,15 @@ out:
        if (nfserr && segments == 0)
                xdr_truncate_encode(xdr, starting_len);
        else {
-               tmp = htonl(eof);
-               write_bytes_to_xdr_buf(xdr->buf, starting_len,     &tmp, 4);
-               tmp = htonl(segments);
-               write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
                if (nfserr) {
                        xdr_truncate_encode(xdr, last_segment);
                        nfserr = nfs_ok;
+                       eof = 0;
                }
+               tmp = htonl(eof);
+               write_bytes_to_xdr_buf(xdr->buf, starting_len,     &tmp, 4);
+               tmp = htonl(segments);
+               write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
        }
 
        return nfserr;
-- 
2.27.0