linux-kernel - Re: Crash when attaching uretprobes to processes running in Docker

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Message-ID: <20250115190304.GB21801@redhat.com>
Date: Wed, 15 Jan 2025 20:03:05 +0100
From: Oleg Nesterov <oleg@...hat.com>
To: Eyal Birger <eyal.birger@...il.com>
Cc: Alexei Starovoitov <alexei.starovoitov@...il.com>,
	Jiri Olsa <olsajiri@...il.com>, Aleksa Sarai <cyphar@...har.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-trace-kernel <linux-trace-kernel@...r.kernel.org>,
	BPF-dev-list <bpf@...r.kernel.org>,
	Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
	John Fastabend <john.fastabend@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <bp@...en8.de>, X86 ML <x86@...nel.org>,
	Linux API <linux-api@...r.kernel.org>,
	Andrii Nakryiko <andrii@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Alexei Starovoitov <ast@...nel.org>,
	Andrii Nakryiko <andrii.nakryiko@...il.com>,
	"rostedt@...dmis.org" <rostedt@...dmis.org>, rafi@....io,
	Shmulik Ladkani <shmulik.ladkani@...il.com>
Subject: Re: Crash when attaching uretprobes to processes running in Docker

On 01/15, Eyal Birger wrote:
>
> --- a/kernel/seccomp.c
> +++ b/kernel/seccomp.c
> @@ -1359,6 +1359,9 @@ int __secure_computing(const struct seccomp_data *sd)
>         this_syscall = sd ? sd->nr :
>                 syscall_get_nr(current, current_pt_regs());
>
> +       if (this_syscall == __NR_uretprobe)
> +               return 0;
> +

Yes, this is what I meant. But we need the new arch-dependent helper.

Oleg.