From b56b53bd70b1f8fa2b5a95d4569bb72a2419b5cd Mon Sep 17 00:00:00 2001
From: Pádraig Brady <P@draigBrady.com>
Date: Mon, 28 Mar 2011 19:22:21 +0100
Subject: copy: protect against overlapping extents

* src/extent-scan.c (extent_scan_read): Add a more stringent check
for OFF_T overflow, to ensure subsequent code is immune.
Detect overlapping extents and adjust, so as files always copied.
Detection using a single scan with fallback to a standard copy
was thought too expensive in memory or time.
* NEWS: Mention the fix
---
 NEWS | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'NEWS')

diff --git a/NEWS b/NEWS
index 9af1cd9c1..0c1aa6b59 100644
--- a/NEWS
+++ b/NEWS
@@ -8,6 +8,10 @@ GNU coreutils NEWS                                    -*- outline -*-
   copying the symlink and then not preserving its timestamp.
   [bug introduced in coreutils-8.0]
 
+  cp now avoids FIEMAP issues with BTRFS before Linux 2.6.38,
+  which could result in corrupt copies of sparse files.
+  [bug introduced in coreutils-8.10]
+
   cut could segfault when invoked with a user-specified output
   delimiter and an unbounded range like "-f1234567890-".
   [bug introduced in coreutils-5.3.0]
-- 
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