Language Selection

English French German Italian Portuguese Spanish

Memory Corruption Bug Solved, 2.6.25 Expected Today

Filed under
Linux

"Finally found it ... the patch below solves the sparsemem crash and the test system boots up fine now," announced Ingo Molnar. He described the patch as fixing a "memory corruption and crash on 32-bit x86 systems. If a !PAE x86 kernel is booted on a 32-bit system with more than 4GB of RAM, then we call memory_present() with a start/end that goes outside the scope of MAX_PHYSMEM_BITS." He included a source snippet with the loop that could corrupt memory, "depending on what that memory is, we might crash, misbehave or just not notice the bug." Ingo went on to note that the bug was first introduced with sparsemem support in the 2.6.16 kernel:

"I believe this was the reason why my many bisection attempts were unsuccessful: the bug pattern was not stable and seemingly working kernels had the memory corruption too. It was pure luck that v2.6.24 'worked' and v2.6.25-rc9 broke visibly."

More Here




More in Tux Machines

Linux evolution

We’re picking our best Linux distributions for 2014. It’s always an odd task and this year we’ve decided to take the chance to delve into the genus behind the distros that we use every day. We’ve been inspired by the GNU/Linux Distribution Timeline at http://futurist.se/gldt which we’ve mentioned before, and decided that we’d explore why the major families in the GNU/Linux world sprang up and how they’ve evolved over the years. Read more

Open source more about process than licensing

It is a testament to the success of the Open Source Initiative's (OSI) branding campaign for open source software that "open source" and "licensing" are functionally synonymous. To the extent that people are familiar with open source software, it is the source code released under a license that lets anyone see the "crown jewels" of a software program as opposed to an opaque binary, or black box that hides its underpinnings. Read more

First open source enterprise resource planning app for Drupal unveiled

ERPAL for Service Providers is the world's first open source ERP built on Drupal, a popular content management system. Read more

Eight Key Open-Source Internet of Things Projects

Open source is key to the development of the Internet of things (IoT). Therefore, the Eclipse Foundation is taking a hard look at IoT for Java developers. In fact, the Eclipse IoT community is making it easier for Java developers to connect and manage devices in an IoT solution by delivering at JavaOne 2014 an open IoT stack for Java developers. Based on open source and open standards, the Eclipse Open IoT Stack for Java simplifies IoT development by enabling Java developers to reuse a core set of frameworks and services in their IoT solutions. In addition to the core Open IoT Stack, a set of industrial frameworks are available to accelerate the process of creating home automation and SCADA factory automation solutions. "Our goal with this is to ensure that Java developers have a free and open-source platform for building IoT solutions," said Mike Milinkovich, executive director of Eclipse. Read more