Linux 6.6: a step forward in protecting against ROP attacks and improving file system interoperability

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How will new kernel features change how you work with Linux?

Linus Torvalds announced the release of a new version of the Linux kernel 6.6, which is expected to be a long-term support release in 2023, despite the recent reduction of the support period from 6 to 2 years.

During the last week of development of Linux 6.6-rc7, there were some concerns that the size of the changes was significantly larger than usual for the rc7 kernel in the 6.x series. However, according to Torvalds, there were no serious problems that could interfere with the release.

Among the most important updates in version 6.6:
  • Implement a KSMBD server in the SMB core, and improve file sharing and interprocess communication to speed up I / O operations.
  • Adding support for Intel's Shadow Stack technology, designed to protect against Return-Oriented Programming (ROP) attacks, which also protects AMD processors.
  • Enable the Earliest Feasible Virtual Deadline First (EEVDF) scheduler, which provides significant performance gains for AMD Bergamo and Intel multi-core processors.
  • Support for Dynamic Boost Control technology from AMD, which allows you to configure Ryzen processors for optimal performance, useful for some Lenovo laptops with Linux.
  • Extending KVM hypervisor support for guests on the RISC-V architecture.
  • Implementation of a driver for HP laptops that allows you to change the BIOS settings directly from Linux.
  • Introduction of additional temperature and voltage sensors for desktop motherboards.
  • Removing references to the US NSA in the context of the Security-Enhanced Linux module, now referred to simply as "SELinux". The NSA has developed a Security-Enhanced Linux module that was previously referred to as"NSA SELinux".

The merge window for the next version of the kernel (Linux 6.7) will open tomorrow, October 31. 2023 turned out to be quite a quiet year for kernel development: 5 releases have already been released in 2023 without any special incidents.

Version 6.7 may be a bit more difficult, as Torvalds has warned that he will be traveling, which usually reduces his productivity a bit. The schedule may also become more complicated as the release approaches Christmas Break and Thanksgiving in the United States, which may slow down work on the new release and even postpone it to early 2024.
 
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