> Subject: Re: [PATCH V3 1/6] x86_64: move cpu_current_top_of_stack out of TSS
The tip tree preferred format for patch subject prefixes is
'subsys/component:', e.g. 'x86/apic:', 'x86/mm/fault:', 'sched/fair:',
'genirq/core:'. Please do not use file names or complete file paths as
prefix. 'git
From: Lai Jiangshan
When X86_BUG_CPU_MELTDOWN & KPTI, cpu_current_top_of_stack lives in the
TSS which is also in the user CR3 and it becomes a coveted fruit. An
attacker can fetch the kernel stack top from it and continue next steps
of actions based on the kernel stack.
The address might not
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