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| author | Chuck Lever <chuck.lever@oracle.com> | 2016-06-29 13:53:52 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2016-07-11 15:50:43 -0400 |
| commit | a54d4059e5f356c522aabfd38563ab6e64773263 (patch) | |
| tree | 9a6393703f0b164aea80960d0096cbedf40a255c /net | |
| parent | 7a89f9c626e337ba6528d8a2829b228c933877fb (diff) | |
| download | linux-a54d4059e5f356c522aabfd38563ab6e64773263.tar.gz linux-a54d4059e5f356c522aabfd38563ab6e64773263.tar.bz2 linux-a54d4059e5f356c522aabfd38563ab6e64773263.zip | |
xprtrdma: Chunk list encoders must not return zero
Clean up, based on code audit: Remove the possibility that the
chunk list XDR encoders can return zero, which would be interpreted
as a NULL.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/xprtrdma/fmr_ops.c | 2 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/frwr_ops.c | 2 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/rpc_rdma.c | 6 |
3 files changed, 7 insertions, 3 deletions
diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c index aae4c372a40f..bc5f4a1e3122 100644 --- a/net/sunrpc/xprtrdma/fmr_ops.c +++ b/net/sunrpc/xprtrdma/fmr_ops.c @@ -246,6 +246,8 @@ fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, } mw->mw_nents = i; mw->mw_dir = rpcrdma_data_dir(writing); + if (i == 0) + goto out_dmamap_err; if (!ib_dma_map_sg(r_xprt->rx_ia.ri_device, mw->mw_sg, mw->mw_nents, mw->mw_dir)) diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index d7613db9185d..f3a06faf0a18 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -411,6 +411,8 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, } mw->mw_nents = i; mw->mw_dir = rpcrdma_data_dir(writing); + if (i == 0) + goto out_dmamap_err; dma_nents = ib_dma_map_sg(ia->ri_device, mw->mw_sg, mw->mw_nents, mw->mw_dir); diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index 77e002f4d005..8fde0ab3b695 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -329,7 +329,7 @@ rpcrdma_encode_read_list(struct rpcrdma_xprt *r_xprt, do { n = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs, false); - if (n <= 0) + if (n < 0) return ERR_PTR(n); *iptr++ = xdr_one; /* item present */ @@ -397,7 +397,7 @@ rpcrdma_encode_write_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req, nchunks = 0; do { n = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs, true); - if (n <= 0) + if (n < 0) return ERR_PTR(n); iptr = xdr_encode_rdma_segment(iptr, seg); @@ -462,7 +462,7 @@ rpcrdma_encode_reply_chunk(struct rpcrdma_xprt *r_xprt, nchunks = 0; do { n = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs, true); - if (n <= 0) + if (n < 0) return ERR_PTR(n); iptr = xdr_encode_rdma_segment(iptr, seg); |