diff options
| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-01-23 19:04:44 -0500 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-01-23 23:06:45 -0500 |
| commit | a67964197c946adbb14d91c3d878af22de47091c (patch) | |
| tree | 8996c288bf2614957663ed1fa83d782ef5fe8ea7 /fs/nfs | |
| parent | badc76dd0dc6d55a86c79e952f19d3af24708058 (diff) | |
| download | lwn-a67964197c946adbb14d91c3d878af22de47091c.tar.gz lwn-a67964197c946adbb14d91c3d878af22de47091c.zip | |
NFSv4: Check for NULL argument in nfs_*_seqid() functions
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/nfs4state.c | 21 | ||||
| -rw-r--r-- | 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, |