From: Jay Freeman (saurik) <saurik@saurik.com>
Date: Fri, 30 Dec 2016 21:48:31 +0000 (-0800)
Subject: You have to do the bounds check before the access.
X-Git-Tag: cydia_1.1.28%b4~2
X-Git-Url: https://git.saurik.com/apt.git/commitdiff_plain/7cafe70555740bd0acbf0b8d2193b95423e7436b

You have to do the bounds check before the access.
---

diff --git a/apt-pkg/tagfile.cc b/apt-pkg/tagfile.cc
index c5c668fd3..1aa67cc67 100644
--- a/apt-pkg/tagfile.cc
+++ b/apt-pkg/tagfile.cc
@@ -389,7 +389,7 @@ bool pkgTagSection::FindInternal(unsigned int Pos, const char *&Start,
    if (unlikely(Start > End))
       return _error->Error("Internal parsing error");
 
-   for (; isspace_ascii(End[-1]) != 0 && End > Start; --End);
+   for (; End > Start && isspace_ascii(End[-1]) != 0; --End);
 
    return true;
 }