From a4dff1bc492ee4a2184d384ae8b5bcab5859e150 Mon Sep 17 00:00:00 2001 From: Stanislav Kinsbursky Date: Fri, 20 Apr 2012 18:11:02 +0400 Subject: [PATCH] SUNRPC: skip dead but not buried clients on PipeFS events These clients can't be safely dereferenced if their counter in 0. Signed-off-by: Stanislav Kinsbursky Signed-off-by: Trond Myklebust --- net/sunrpc/clnt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 67972462a543..d10ebc4310f7 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -218,7 +218,8 @@ static struct rpc_clnt *rpc_get_client_for_event(struct net *net, int event) if (((event == RPC_PIPEFS_MOUNT) && clnt->cl_dentry) || ((event == RPC_PIPEFS_UMOUNT) && !clnt->cl_dentry)) continue; - atomic_inc(&clnt->cl_count); + if (atomic_inc_not_zero(&clnt->cl_count) == 0) + continue; spin_unlock(&sn->rpc_client_lock); return clnt; } -- 2.20.1