Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-ie0-f180.google.com ([209.85.223.180]:57814 "EHLO mail-ie0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751316AbbAXFjh (ORCPT ); Sat, 24 Jan 2015 00:39:37 -0500 Received: by mail-ie0-f180.google.com with SMTP id rl12so1047744iec.11 for ; Fri, 23 Jan 2015 21:39:37 -0800 (PST) From: Trond Myklebust To: linux-nfs@vger.kernel.org Subject: [PATCH 4/5] NFSv4: Check for NULL argument in nfs_*_seqid() functions Date: Sat, 24 Jan 2015 00:39:27 -0500 Message-Id: <1422077968-116473-5-git-send-email-trond.myklebust@primarydata.com> In-Reply-To: <1422077968-116473-4-git-send-email-trond.myklebust@primarydata.com> References: <1422077968-116473-1-git-send-email-trond.myklebust@primarydata.com> <1422077968-116473-2-git-send-email-trond.myklebust@primarydata.com> <1422077968-116473-3-git-send-email-trond.myklebust@primarydata.com> <1422077968-116473-4-git-send-email-trond.myklebust@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Signed-off-by: Trond Myklebust --- fs/nfs/nfs4state.c | 21 ++++++++++++++------- fs/nfs/nfs4xdr.c | 5 ++++- 2 files changed, 18 insertions(+), 8 deletions(-) diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index b922e43d69b8..590f096fd011 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -1015,7 +1015,7 @@ void nfs_release_seqid(struct nfs_seqid *seqid) { struct nfs_seqid_counter *sequence; - if (list_empty(&seqid->list)) + if (seqid == NULL || list_empty(&seqid->list)) return; sequence = seqid->sequence; spin_lock(&sequence->lock); @@ -1071,13 +1071,15 @@ static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) { - struct nfs4_state_owner *sp = container_of(seqid->sequence, - struct nfs4_state_owner, so_seqid); - struct nfs_server *server = sp->so_server; + struct nfs4_state_owner *sp; + + if (seqid == NULL) + return; + sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); if (status == -NFS4ERR_BAD_SEQID) nfs4_drop_state_owner(sp); - if (!nfs4_has_session(server->nfs_client)) + if (!nfs4_has_session(sp->so_server->nfs_client)) nfs_increment_seqid(status, seqid); } @@ -1088,14 +1090,18 @@ void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) */ void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) { - nfs_increment_seqid(status, seqid); + if (seqid != NULL) + nfs_increment_seqid(status, seqid); } int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) { - struct nfs_seqid_counter *sequence = seqid->sequence; + struct nfs_seqid_counter *sequence; int status = 0; + if (seqid == NULL) + goto out; + sequence = seqid->sequence; spin_lock(&sequence->lock); seqid->task = task; if (list_empty(&seqid->list)) @@ -1106,6 +1112,7 @@ int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) status = -EAGAIN; unlock: spin_unlock(&sequence->lock); +out: return status; } diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 7e7be5ab70bb..d05fada4929c 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -946,7 +946,10 @@ static void encode_uint64(struct xdr_stream *xdr, u64 n) static void encode_nfs4_seqid(struct xdr_stream *xdr, const struct nfs_seqid *seqid) { - encode_uint32(xdr, seqid->sequence->counter); + if (seqid != NULL) + encode_uint32(xdr, seqid->sequence->counter); + else + encode_uint32(xdr, 0); } static void encode_compound_hdr(struct xdr_stream *xdr, -- 2.1.0