Re: [PATCH 1/3] NFSv4: Fix two infinite loops in the mount code

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Hi. Trond.

Is it better if exception.retry set to zero instead goto ?

Thanks.

2012/3/28 Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>:
> We can currently loop forever in nfs4_lookup_root() and in
> nfs41_proc_secinfo_no_name(), if the first iteration returns a
> NFS4ERR_DELAY or something else that causes exception.retry to get
> set.
>
> Reported-by: Dros Adamson <Weston.Adamson@xxxxxxxxxx>
> Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> ---
>  fs/nfs/nfs4proc.c |    6 ++++--
>  1 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
> index 45df7d4..ee9ca19 100644
> --- a/fs/nfs/nfs4proc.c
> +++ b/fs/nfs/nfs4proc.c
> @@ -2290,11 +2290,12 @@ static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
>                switch (err) {
>                case 0:
>                case -NFS4ERR_WRONGSEC:
> -                       break;
> +                       goto out;
>                default:
>                        err = nfs4_handle_exception(server, err, &exception);
>                }
>        } while (exception.retry);
> +out:
>        return err;
>  }
>
> @@ -6229,11 +6230,12 @@ nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
>                case 0:
>                case -NFS4ERR_WRONGSEC:
>                case -NFS4ERR_NOTSUPP:
> -                       break;
> +                       goto out;
>                default:
>                        err = nfs4_handle_exception(server, err, &exception);
>                }
>        } while (exception.retry);
> +out:
>        return err;
>  }
>
> --
> 1.7.7.6
>
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