From 619b95c7f1cd944a9bc8eb407f4510039639a74b Mon Sep 17 00:00:00 2001
From: Matheus <matheusuky@gmail.com>
Date: Sat, 24 Sep 2022 15:14:20 -0300
Subject: [PATCH] framebuffer: handle an edge case

---
 src/video/framebuffer.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/video/framebuffer.c b/src/video/framebuffer.c
index 2ba8b753..25d59f27 100644
--- a/src/video/framebuffer.c
+++ b/src/video/framebuffer.c
@@ -18,6 +18,10 @@ static int devchecks(int fb, size_t* count, size_t offset){
 
 	size_t end = fbs[fb]->pitch * fbs[fb]->height;
 
+	if(offset >= end){
+		*count = 0;
+	}
+
 	if(*count + offset > end)
 		*count = end - offset;
 
@@ -32,9 +36,9 @@ int read(int* error, int minor, void* buff, size_t count, size_t offset){
 
 	if(*error)
 		return -1;
-	
+
 	memcpy(buff, fbs[minor]->address + offset, count);
-	
+
 	return count;
 	
 }
@@ -45,7 +49,7 @@ int write(int* error, int minor, void* buff, size_t count, size_t offset){
 
 	if(*error)
 		return -1;
-	
+
 	memcpy(fbs[minor]->address + offset, buff, count);
 
 	return count;