Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault

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Subject: Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault
From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Date: Fri, 22 Feb 2019 18:32:49 -0800
Cc: David Miller <davem@xxxxxxxxxxxxx>, Masami Hiramatsu <mhiramat@xxxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxxxxxx>, Linux List Kernel Mailing <linux-kernel@xxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, stable <stable@xxxxxxxxxxxxxxx>, Changbin Du <changbin.du@xxxxxxxxx>, Jann Horn <jannh@xxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Andrew Lutomirski <luto@xxxxxxxxxx>, Daniel Borkmann <daniel@xxxxxxxxxxxxx>, Netdev <netdev@xxxxxxxxxxxxxxx>, bpf@xxxxxxxxxxxxxxx
In-reply-to: <20190223022850.nv4hnweueetprbot@ast-mbp.dhcp.thefacebook.com>

On Fri, Feb 22, 2019 at 6:29 PM Alexei Starovoitov
<alexei.starovoitov@xxxxxxxxx> wrote:
>
> imo this kernel release should finish as-is and in the next cycle we can
> change probe_kernel_read() to reject user address [..]

Absolutely. Nothing is going to change right now for 5.0, which is imminent.

It's really a "long-term we really need to fix this", where the only
question is how soon "long-term" is.

                   Linus

References:
- Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault
  - From: Linus Torvalds
- Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault
  - From: Alexei Starovoitov
- Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault
  - From: Linus Torvalds
- Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault
  - From: David Miller
- Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault
  - From: Linus Torvalds
- Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault
  - From: Alexei Starovoitov
- Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault
  - From: Linus Torvalds
- Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault
  - From: Alexei Starovoitov
- Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault
  - From: Linus Torvalds
- Re: [PATCH 1/2 v2] kprobe: Do not use uaccess functions to access kernel memory that can fault
  - From: Alexei Starovoitov

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