From 81c88b18de1f11f70c97f28ced8d642c00bb3955 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Thu, 20 Dec 2018 10:35:11 -0500 Subject: [PATCH] sunrpc: handle ENOMEM in rpcb_getport_async If we ignore the error we'll hit a null dereference a little later. Reported-by: syzbot+4b98281f2401ab849f4b@syzkaller.appspotmail.com Signed-off-by: J. Bruce Fields Signed-off-by: Anna Schumaker --- net/sunrpc/rpcb_clnt.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c index c7872bc13860..08b5fa4a2852 100644 --- a/net/sunrpc/rpcb_clnt.c +++ b/net/sunrpc/rpcb_clnt.c @@ -771,6 +771,12 @@ void rpcb_getport_async(struct rpc_task *task) case RPCBVERS_3: map->r_netid = xprt->address_strings[RPC_DISPLAY_NETID]; map->r_addr = rpc_sockaddr2uaddr(sap, GFP_ATOMIC); + if (!map->r_addr) { + status = -ENOMEM; + dprintk("RPC: %5u %s: no memory available\n", + task->tk_pid, __func__); + goto bailout_free_args; + } map->r_owner = ""; break; case RPCBVERS_2: @@ -793,6 +799,8 @@ void rpcb_getport_async(struct rpc_task *task) rpc_put_task(child); return; +bailout_free_args: + kfree(map); bailout_release_client: rpc_release_client(rpcb_clnt); bailout_nofree: -- 2.30.2