From: Dan Carpenter <dan.carpenter@linaro.org>
Date: Wed, 11 Oct 2023 11:00:22 +0300
Subject: [PATCH] SUNRPC: Add an IS_ERR() check back to where it was
Git-commit: 4f3ed837186fc0d2722ba8d2457a594322e9c2ef
Patch-mainline: v6.7
References: git-fixes

This IS_ERR() check was deleted during in a cleanup because, at the time,
the rpcb_call_async() function could not return an error pointer.  That
changed in commit 25cf32ad5dba ("SUNRPC: Handle allocation failure in
rpc_new_task()") and now it can return an error pointer.  Put the check
back.

A related revert was done in commit 13bd90141804 ("Revert "SUNRPC:
Remove unreachable error condition"").

Fixes: 037e910b52b0 ("SUNRPC: Remove unreachable error condition in rpcb_getport_async()")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Acked-by: NeilBrown <neilb@suse.com>

---
 net/sunrpc/rpcb_clnt.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -746,6 +746,10 @@ void rpcb_getport_async(struct rpc_task
 
 	child = rpcb_call_async(rpcb_clnt, map, proc);
 	rpc_release_client(rpcb_clnt);
+	if (IS_ERR(child)) {
+		/* rpcb_map_release() has freed the arguments */
+		return;
+	}
 
 	xprt->stat.bind_count++;
 	rpc_put_task(child);