From 2139e0a2014600cba95389d69aa36cf709727eac Mon Sep 17 00:00:00 2001
From: Brian Gianforcaro <b.gianfo@gmail.com>
Date: Sun, 21 Feb 2021 06:23:37 -0800
Subject: [PATCH] Kernel: Handle overflow in FileDescription::seek(, SEEK_CUR)

---
 Kernel/FileSystem/FileDescription.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Kernel/FileSystem/FileDescription.cpp b/Kernel/FileSystem/FileDescription.cpp
index 718add2434..a11d7d3bc6 100644
--- a/Kernel/FileSystem/FileDescription.cpp
+++ b/Kernel/FileSystem/FileDescription.cpp
@@ -138,6 +138,8 @@ off_t FileDescription::seek(off_t offset, int whence)
         new_offset = offset;
         break;
     case SEEK_CUR:
+        if (Checked<off_t>::addition_would_overflow(m_current_offset, offset))
+            return -EOVERFLOW;
         new_offset = m_current_offset + offset;
         break;
     case SEEK_END: