From: Jay Freeman (saurik) <saurik@saurik.com>
Date: Mon, 30 Jan 2017 17:13:46 +0000 (-0800)
Subject: The length given to msync was calculated wrong :/.
X-Git-Tag: cydia_1.1.28%b8~5
X-Git-Url: https://git.saurik.com/apt.git/commitdiff_plain/89cb5d4dd729c4b8479eec94b9c4a58e11ab1794

The length given to msync was calculated wrong :/.
---

diff --git a/apt-pkg/contrib/mmap.cc b/apt-pkg/contrib/mmap.cc
index 4c58a096d..cb73fbc5d 100644
--- a/apt-pkg/contrib/mmap.cc
+++ b/apt-pkg/contrib/mmap.cc
@@ -202,7 +202,8 @@ bool MMap::Sync(unsigned long Start,unsigned long Stop)
       {
 #ifdef _POSIX_SYNCHRONIZED_IO
 	 unsigned long long const PSize = sysconf(_SC_PAGESIZE);
-	 if (msync((char *)Base+(Start/PSize)*PSize, Stop - Start, MS_SYNC) < 0)
+         Start = (Start/PSize)*PSize;
+	 if (msync((char *)Base+Start, Stop - Start, MS_SYNC) < 0)
 	    return _error->Errno("msync", _("Unable to synchronize mmap"));
 #endif
       }