Kernel: KVM, Btrfs and nosymfollow


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KVM For Linux 5.10 Brings New "TDP" MMU To Help VMs With Hundreds Of vCPUs, TBs of RAM - Phoronix
The Kernel-based Virtual Machine (KVM) is seeing plenty of improvements with the Linux 5.10 kernel.
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Slashdot Asks: How Do You Feel About Btrfs? - Slashdot
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Linux 5.10 Adds "nosymfollow" Mount Option Security Defense - Phoronix
FreeBSD has long supported a "nosymfollow" mount option to prevent following of symlinks on mounted file-systems while now the mainline Linux kernel is adding a similar security defense.
Driven along by Google's kernel engineers as their work on Chrome OS, they have upstreamed their nosymfollow implementation to the mainline kernel with Linux 5.10. The premise of this feature is to not follow symlinks when resolving paths within the kernel. Symlinks can still be created on the mounted file-system and readlink() will still function, thus not breaking user-space usage of symlinks, but this generic mount option is intended as a kernel defense.
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