(orc) branch branch-2.0 updated: Fix Integer Overflow in `Seekable(Array|File)InputStream::Skip`

[dongjoon]

This is an automated email from the ASF dual-hosted git repository.

dongjoon pushed a commit to branch branch-2.0
in repository https://gitbox.apache.org/repos/asf/orc.git


The following commit(s) were added to refs/heads/branch-2.0 by this push:
     new a85515e35 Fix Integer Overflow in 
`Seekable(Array|File)InputStream::Skip`
a85515e35 is described below

commit a85515e3596b9de2a28c4b5938d748b439e69407
Author: Dongjoon Hyun <dongj...@apache.org>
AuthorDate: Wed Feb 18 19:56:35 2026 -0800

    Fix Integer Overflow in `Seekable(Array|File)InputStream::Skip`
---
 c++/src/io/InputStream.cc | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/c++/src/io/InputStream.cc b/c++/src/io/InputStream.cc
index 850f799d9..53ac433de 100644
--- a/c++/src/io/InputStream.cc
+++ b/c++/src/io/InputStream.cc
@@ -102,7 +102,7 @@ namespace orc {
   bool SeekableArrayInputStream::Skip(int count) {
     if (count >= 0) {
       uint64_t unsignedCount = static_cast<uint64_t>(count);
-      if (unsignedCount + position <= length) {
+      if (unsignedCount <= length - position) {
         position += unsignedCount;
         return true;
       } else {
@@ -186,7 +186,11 @@ namespace orc {
       return false;
     }
     uint64_t count = static_cast<uint64_t>(signedCount);
-    position = std::min(position + count, length);
+    if (count > length - position) {
+      position = length;
+    } else {
+      position += count;
+    }
     pushBack = 0;
     return position < length;
   }