NFSv4 remove zero number of fs_locations entries error check

[ Upstream commit 90e12a3191040bd3854d3e236c35921e4e92a044 ]

Remove the check for the zero length fs_locations reply in the
xdr decoding, and instead check for that in the migration code.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 4bf10792cb5b1049790ec0d0584f263fb3bac96c..cbeec29e9f21a69cc53a0833799954cd1a45fb11 100644 (file)
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -2104,6 +2104,9 @@ static int nfs4_try_migration(struct nfs_server *server, const struct cred *cred
        }
 
        result = -NFS4ERR_NXIO;
+       if (!locations->nlocations)
+               goto out;
+
        if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) {
                dprintk("<-- %s: No fs_locations data, migration skipped\n",
                        __func__);

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 9f8bd45379e7250e293a870f74bd6002ca20577c..e2f0e3446e22a99ad6d06ec9af112fe696840595 100644 (file)
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -3680,8 +3680,6 @@ static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, st
        if (unlikely(!p))
                goto out_eio;
        n = be32_to_cpup(p);
-       if (n <= 0)
-               goto out_eio;
        for (res->nlocations = 0; res->nlocations < n; res->nlocations++) {
                u32 m;
                struct nfs4_fs_location *loc;