diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2017-10-16 15:01:06 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2017-11-17 13:47:53 -0500 |
| commit | 61433af56077f5fd8815281b44938d84feb04687 (patch) | |
| tree | 3fc82e93f1cf8e68d39b4b02e1c563b024357d32 /net | |
| parent | 2b4f8923ecaafc0c25ee56bc17ea9256d12b747c (diff) | |
| download | linux-61433af56077f5fd8815281b44938d84feb04687.tar.gz | |
xprtrdma: Throw away reply when version is unrecognized
A reply with an unrecognized value in the version field means the
transport header is potentially garbled and therefore all the fields
are untrustworthy.
Fixes: 59aa1f9a3cce3 ("xprtrdma: Properly handle RDMA_ERROR ... ")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/xprtrdma/rpc_rdma.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index f1889f4d4803..20c9e4cbaa73 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -1248,6 +1248,9 @@ rpcrdma_reply_handler(struct work_struct *work) p++; /* credits */ proc = *p++; + if (vers != rpcrdma_version) + goto out_badversion; + if (rpcrdma_is_bcall(r_xprt, rep, xid, proc)) return; @@ -1280,8 +1283,6 @@ rpcrdma_reply_handler(struct work_struct *work) } xprt->reestablish_timeout = 0; - if (vers != rpcrdma_version) - goto out_badversion; switch (proc) { case rdma_msg: @@ -1321,17 +1322,15 @@ out_badstatus: } return; -/* If the incoming reply terminated a pending RPC, the next - * RPC call will post a replacement receive buffer as it is - * being marshaled. - */ out_badversion: dprintk("RPC: %s: invalid version %d\n", __func__, be32_to_cpu(vers)); - status = -EIO; - r_xprt->rx_stats.bad_reply_count++; - goto out; + goto repost; +/* If the incoming reply terminated a pending RPC, the next + * RPC call will post a replacement receive buffer as it is + * being marshaled. + */ out_badheader: dprintk("RPC: %5u %s: invalid rpcrdma reply (type %u)\n", rqst->rq_task->tk_pid, __func__, be32_to_cpu(proc)); |