LibVT: Prevent u16 underflow when resizing terminal to a height of 1

Resizing the Terminal window to its smallest size no longer crashes. Fixes #7296.
Author: https://github.com/gmta Commit: https://github.com/SerenityOS/serenity/commit/441555ea56 Pull-request: https://github.com/SerenityOS/serenity/pull/16191 Issue: https://github.com/SerenityOS/serenity/issues/7296
2022-11-25 22:51:42 +01:00 · 2022-11-25 22:51:42 +01:00 · 441555ea56 · 2024-07-18 02:47:59 +09:00
commit 441555ea56
parent 19e6befddc
1 changed files with 1 additions and 1 deletions
--- a/Userland/Libraries/LibVT/Terminal.cpp
+++ b/Userland/Libraries/LibVT/Terminal.cpp
@ -781,7 +781,7 @@ void Terminal::scroll_up(u16 region_top, u16 region_bottom, size_t count)
    }
    // Set dirty flag on swapped lines.
    // The other lines have implicitly been set dirty by being cleared.
-    for (u16 row = region_top; row <= region_bottom - count; ++row)
+    for (u16 row = region_top; row + count <= region_bottom; ++row)
        active_buffer()[row].set_dirty(true);
    m_client.terminal_history_changed(history_delta);
 }