NFS4: Cleanup FATTR4_WORD0_FS_LOCATIONS after decoding success

Commit 1ca843a2d2 "nfs: Fix GETATTR bitmap verification" has check
the bitmap after decoding success, but decode_attr_fs_locations forgets
cleanup the FATTR4_WORD0_FS_LOCATIONS bits.

decode_getfattr_attrs always return -EIO when meeting FS_LOCATIONS now.

ls: cannot access /mnt/referal: Input/output error
ls: cannot access /mnt/replicas: Input/output error
total 32
drwxr-xr-x. 7 root root 8192 Nov 16 20:36 pnfs
??????????? ? ?    ?       ?            ? referal
??????????? ? ?    ?       ?            ? replicas

v2: clear the bit earlier

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index dfed4f5c8fcc..4e4441216804 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -3615,6 +3615,7 @@ static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, st
         status = 0;
         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
                 goto out;
+        bitmap[0] &= ~FATTR4_WORD0_FS_LOCATIONS;
         status = -EIO;
         /* Ignore borken servers that return unrequested attrs */
         if (unlikely(res == NULL))