From cf7b6f6cf0bad818da4ba87a80424b4134b0cde4 Mon Sep 17 00:00:00 2001
From: Rickard Green <rickard@erlang.org>
Date: Wed, 29 Sep 2021 14:03:47 +0200
Subject: Fix handling asynchronous port close

Sending a "Port ! {PortOwner, close}" signal from a process other than
the port owner could erroneously trigger a badsig exit signal being
sent to the port owner process even though the correct PortOwner had
been passed in the signal.
---
 erts/emulator/beam/io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c
index d7fa2f2696..5f81449eab 100644
--- a/erts/emulator/beam/io.c
+++ b/erts/emulator/beam/io.c
@@ -2271,7 +2271,7 @@ erts_port_exit(Process *c_p,
 	switch (try_imm_drv_call(&try_call_state)) {
 	case ERTS_TRY_IMM_DRV_CALL_OK: {
 	    res = call_deliver_port_exit(flags & ERTS_PORT_SIG_FLG_BANG_OP,
-					 c_p ? c_p->common.id : from,
+					 from,
 					 prt,
 					 try_call_state.state,
 					 reason,
-- 
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