Hello. I would like to note, that "Meltdown" mitigation - for i386 architecture - among others improvements, is already available in OpenBSD 6.4 release (see "Security improvements" section [in:] https://www.openbsd.org/64.html).
Best regards. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1790688 Title: x86/pti: 32-bit x86 systems support already available. Status in linux package in Ubuntu: Triaged Bug description: Hello. This is a very good news: 'PTI' support for x86-32 architecture is available. Linux kernel v4.19 release candidate, finally have Kernel Page-Table Isolation ('PTI', previously known as 'KAISER') support. As we know, 'PTI' provides protection against attack, known as the "Meltdown" (CVE-2017-5754), that breaks isolation between user applications and the operating system etc. However, this protection - needed for "Meltdown" mitigation - wasn't available on 32-bit x86 systems. Until now. So, I would like to ask a question: are there any plans to backport Kernel Page-Table Isolation patches for Linux kernels available in "Trusty"/14.04, "Xenial"/16.04 and "Bionic"/18.04 releases etc.? I'm asking, because it seems, that pretty much no developers run 32-bit any more. However, there still are many 32-bit users out there. For more informations about how 'PTI' was implemented, created for 32 bit x86 architecture, please check - for example - commit '7757d607c6b31' ("x86/pti: Allow CONFIG_PAGE_TABLE_ISOLATION for x86_32") and these messages on lkml mailing list and lwn.net website (which contains summary of the first half of the 4.19 kernel merge window): ✗ http://lkml.iu.edu/hypermail/linux/kernel/1807.2/02790.html ('PTI' on x86-32; PATCH v.8) ✗ https://lwn.net/Articles/762566/ (See "Architecture-specific" changes) I would like to send a big "Thank You" to Mr Joerg Roedel (and Others, of course) for his amazing work - a whole raft of measures and patches to make this possible - to enable 'PTI' mitigation on x86-32 architecture etc. Thanks, best regards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1790688/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
