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| author |   Chuck Lever <chuck.lever@oracle.com> | 2015-12-16 17:22:14 -0500 |
|---|---|---|
| committer |   Anna Schumaker <Anna.Schumaker@Netapp.com> | 2015-12-18 15:34:33 -0500 |
| commit | ffc4d9b1596c34caa98962722e930e97912c8a9f (patch) | |
| tree | d10df0074087ca02a690b263f7c0d3e25b536918 /net/sunrpc/xprtrdma | |
| parent | xprtrdma: Fix additional uses of spin_lock_irqsave(rb_lock) (diff) | |
| download | linux-dev-ffc4d9b1596c34caa98962722e930e97912c8a9f.tar.xz linux-dev-ffc4d9b1596c34caa98962722e930e97912c8a9f.zip | |
xprtrdma: xprt_rdma_free() must not release backchannel reqs
Preserve any rpcrdma_req that is attached to rpc_rqst's allocated
for the backchannel. Otherwise, after all the pre-allocated
backchannel req's are consumed, incoming backward calls start
writing on freed memory.
Somehow this hunk got lost.
Fixes: f531a5dbc451 ('xprtrdma: Pre-allocate backward rpc_rqst')
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Devesh Sharma <devesh.sharma@avagotech.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma')
| -rw-r--r-- | net/sunrpc/xprtrdma/transport.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index 8c545f7d7525..740bddcf3488 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -576,6 +576,9 @@ xprt_rdma_free(void *buffer) rb = container_of(buffer, struct rpcrdma_regbuf, rg_base[0]); req = rb->rg_owner; + if (req->rl_backchannel) + return; + r_xprt = container_of(req->rl_buffer, struct rpcrdma_xprt, rx_buf); dprintk("RPC: %s: called on 0x%p\n", __func__, req->rl_reply); |