From 152f7db416c4bfcc8fc01e55cae60f63489580fa Mon Sep 17 00:00:00 2001 From: Olga Kornievskaia Date: Thu, 9 Dec 2021 14:53:29 -0500 Subject: 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 Signed-off-by: Anna Schumaker Signed-off-by: Sasha Levin --- fs/nfs/nfs4state.c | 3 +++ fs/nfs/nfs4xdr.c | 2 -- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index b3086e99420c..9c98547fcefc 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -2066,6 +2066,9 @@ static int nfs4_try_migration(struct nfs_server *server, struct rpc_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 8a61dc21d3d6..56e48642c43e 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -3747,8 +3747,6 @@ static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, st if (unlikely(!p)) goto out_overflow; 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; -- cgit v1.2.3