From b8df0647fd40d6724a236d6ace5c63568fca3241 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Fri, 29 May 2020 00:04:46 +1000
Subject: [PATCH] mw_debug: Fix memory overflow with "sim" backend

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 scripts/mw_debug/mw_debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/mw_debug/mw_debug.c b/scripts/mw_debug/mw_debug.c
index fec9722..8999c8c 100644
--- a/scripts/mw_debug/mw_debug.c
+++ b/scripts/mw_debug/mw_debug.c
@@ -176,7 +176,7 @@ static int sim_command(uint8_t op, uint8_t addr, uint64_t *data)
 		printf("\n");
 	}
 	write(sim_fd, buf, p - buf);
-	r = read(sim_fd, buf, 127);
+	r = read(sim_fd, buf, sizeof(buf));
 	if (0 && r > 0) {
 		int i;