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authorTrond Myklebust <trondmy@gmail.com>2019-10-17 09:02:21 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2019-10-30 12:04:35 -0400
commit669996add4c92476e0f8d6b4cd2bb308d1939fd7 (patch)
tree852233b875cc79b84abc36c64ee0c7e262831d28 /net/sunrpc
parent9edb455e6797bb50aa38ef71e62668966065ede8 (diff)
SUNRPC: Destroy the back channel when we destroy the host transport
When we're destroying the host transport mechanism, we should ensure that we do not leak memory by failing to release any back channel slots that might still exist. Reported-by: Neil Brown <neilb@suse.de> Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/backchannel_rqst.c2
-rw-r--r--net/sunrpc/xprt.c5
2 files changed, 6 insertions, 1 deletions
diff --git a/net/sunrpc/backchannel_rqst.c b/net/sunrpc/backchannel_rqst.c
index 7eb251372f94..195b40c5dae4 100644
--- a/net/sunrpc/backchannel_rqst.c
+++ b/net/sunrpc/backchannel_rqst.c
@@ -220,7 +220,7 @@ void xprt_destroy_bc(struct rpc_xprt *xprt, unsigned int max_reqs)
goto out;
spin_lock_bh(&xprt->bc_pa_lock);
- xprt->bc_alloc_max -= max_reqs;
+ xprt->bc_alloc_max -= min(max_reqs, xprt->bc_alloc_max);
list_for_each_entry_safe(req, tmp, &xprt->bc_pa_list, rq_bc_pa_list) {
dprintk("RPC: req=%p\n", req);
list_del(&req->rq_bc_pa_list);
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 8a45b3ccc313..41df4c507193 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -1943,6 +1943,11 @@ static void xprt_destroy_cb(struct work_struct *work)
rpc_destroy_wait_queue(&xprt->backlog);
kfree(xprt->servername);
/*
+ * Destroy any existing back channel
+ */
+ xprt_destroy_backchannel(xprt, UINT_MAX);
+
+ /*
* Tear down transport state and free the rpc_xprt
*/
xprt->ops->destroy(xprt);