Re: [PATCH] x86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task

[Ingo Molnar]

* Eric Dumazet <edumazet@xxxxxxxxxx> wrote:

> syzbot found its way in 86_fsgsbase_read_task() [1]
> 
> Fix is to make sure ldt pointer is not NULL.

Thanks for this fix. Linus has picked it up (inclusive the typos to 
the x86_fsgsbase_read_task() function name ;-), it's now upstream 
under:

  8ab49526b53d: ("x86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task")

By the fixes tag it looks like this should probably be backported all 
the way back to ~v4.20 or so?

Thanks,

	Ingo