Package: libapt-pkg-dev Version: 0.6.42.3exp1 Severity: normal Tags: patch The following code should not crash, but it does:
pkgCache::VerIterator ver;
if(ver.end())
...;
The problem is that end() doesn't check whether Owner is NULL before
dereferencing it. The following patch fixes this crash:
--- orig/apt-pkg/cacheiterators.h
+++ mod/apt-pkg/cacheiterators.h
@@ -163,7 +163,7 @@
// Iteration
void operator ++(int) {if (Desc != Owner->DescP) Desc = Owner->DescP +
Desc->NextDesc;};
inline void operator ++() {operator ++(0);};
- inline bool end() const {return Desc == Owner->DescP?true:false;};
+ inline bool end() const {return Owner == NULL || (Desc ==
Owner->DescP?true:false);};
inline void operator =(const DescIterator &B) {Desc = B.Desc; Owner =
B.Owner;};
// Comparison
Daniel
-- System Information:
Debian Release: testing/unstable
APT prefers unstable
APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.14-2-686
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Versions of packages libapt-pkg-dev depends on:
ii apt [libapt-pkg-libc6.3-6-3 0.6.42.3exp1 Advanced front-end for dpkg
ii apt-utils 0.6.42.3exp1 APT utility programs
libapt-pkg-dev recommends no packages.
-- no debconf information
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