From 5efa5d8898049c70e71b1205c868b0f6c7a90191 Mon Sep 17 00:00:00 2001
From: Luna <lunahatesgogle@gmail.com>
Date: Mon, 24 Apr 2023 20:31:39 -0300
Subject: [PATCH] x11: Assert that size >= buffer_size

---
 src/x11.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/x11.rs b/src/x11.rs
index 7ce4eda..8d47476 100644
--- a/src/x11.rs
+++ b/src/x11.rs
@@ -540,6 +540,8 @@ struct ShmSegment {
 impl ShmSegment {
     /// Create a new `ShmSegment` with the given size.
     fn new(size: usize, buffer_size: usize) -> io::Result<Self> {
+        assert!(size >= buffer_size);
+
         unsafe {
             // Create the shared memory segment.
             let id = shmget(IPC_PRIVATE, size, 0o600);
@@ -588,6 +590,7 @@ impl ShmSegment {
 
     /// Set the size of the buffer for this shared memory segment.
     fn set_buffer_size(&mut self, buffer_size: usize) {
+        assert!(self.size >= buffer_size);
         self.buffer_size = buffer_size
     }