From 83ac04c1a925ab14a49d9b5a9cbc379340f2890b Mon Sep 17 00:00:00 2001
From: Hector Martin <marcan@marcan.st>
Date: Wed, 18 Sep 2024 00:00:22 +0900
Subject: [PATCH] fb: Fix FB junk leftover from stage1 in stage2

Signed-off-by: Hector Martin <marcan@marcan.st>
---
 src/fb.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/fb.c b/src/fb.c
index d7b4f476..1a0e4e77 100644
--- a/src/fb.c
+++ b/src/fb.c
@@ -400,8 +400,12 @@ void fb_init(bool clear)
                         &orig_logo);
     }
 
-    if (clear)
+    if (clear) {
         memset32(fb.ptr, 0, fb.size);
+    } else {
+        // Workaround for m1n1 stage 1 framebuffer UAF bug
+        memset32(fb.ptr, 0, min(256, fb.size));
+    }
 
     console.margin.rows = 2;
     console.margin.cols = 4;