From: Jiri Olsa <olsajiri@gmail.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Eyal Birger <eyal.birger@gmail.com>,
Jiri Olsa <olsajiri@gmail.com>, Aleksa Sarai <cyphar@cyphar.com>,
mhiramat@kernel.org, linux-kernel <linux-kernel@vger.kernel.org>,
linux-trace-kernel@vger.kernel.org,
BPF-dev-list <bpf@vger.kernel.org>,
Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
peterz@infradead.org, tglx@linutronix.de, bp@alien8.de,
x86@kernel.org, linux-api@vger.kernel.org,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii.nakryiko@gmail.com>,
"rostedt@goodmis.org" <rostedt@goodmis.org>,
rafi@rbk.io, Shmulik Ladkani <shmulik.ladkani@gmail.com>
Subject: Re: Crash when attaching uretprobes to processes running in Docker
Date: Tue, 14 Jan 2025 15:56:58 +0100 [thread overview]
Message-ID: <Z4Z7OkrtXBauaLcm@krava> (raw)
In-Reply-To: <20250114143313.GA29305@redhat.com>
On Tue, Jan 14, 2025 at 03:33:13PM +0100, Oleg Nesterov wrote:
> On 01/14, Eyal Birger wrote:
> >
> > FWIW If I change the seccomp policy to SCMP_ACT_KILL this still fails.
>
> Ah... I don't know what SCMP_ACT_KILL is, but indeed, in general it is
> not safe to even try to call sys_uretprobe() if it is filtered.
>
> Say, __secure_computing(SECCOMP_MODE_STRICT)->__secure_computing_strict()
> does do_exit(SIGKILL) :/
ugh.. could we just 'disable' uretprobe trampoline when seccomp gets enabled?
overwrite first byte with int3.. and similarly check on seccomp when installing
uretprobe and switch to int3
jirka
next prev parent reply other threads:[~2025-01-14 14:57 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-10 15:12 Crash when attaching uretprobes to processes running in Docker Eyal Birger
2025-01-10 15:25 ` Aleksa Sarai
2025-01-11 18:40 ` Jiri Olsa
2025-01-14 9:22 ` Jiri Olsa
2025-01-14 10:05 ` Masami Hiramatsu
2025-01-14 11:21 ` Oleg Nesterov
2025-01-14 14:21 ` Jiri Olsa
2025-01-17 1:23 ` Masami Hiramatsu
2025-01-17 1:57 ` Oleg Nesterov
2025-01-14 10:42 ` Peter Zijlstra
2025-01-14 11:01 ` Oleg Nesterov
2025-01-14 12:02 ` Peter Zijlstra
2025-01-14 12:32 ` Oleg Nesterov
2025-01-14 14:07 ` Peter Zijlstra
2025-01-14 17:43 ` Oleg Nesterov
2025-01-14 10:58 ` Oleg Nesterov
2025-01-14 14:19 ` Jiri Olsa
2025-01-14 19:21 ` Andrii Nakryiko
2025-01-14 20:39 ` Oleg Nesterov
2025-01-14 21:45 ` Andrii Nakryiko
2025-01-14 22:10 ` Oleg Nesterov
2025-01-14 23:52 ` Andrii Nakryiko
2025-01-15 0:09 ` Eyal Birger
2025-01-15 0:50 ` Oleg Nesterov
2025-01-15 5:45 ` Shmulik Ladkani
2025-01-15 15:51 ` Oleg Nesterov
2025-01-17 11:41 ` Peter Zijlstra
2025-01-17 17:53 ` Andrii Nakryiko
2025-01-14 14:08 ` Eyal Birger
2025-01-14 14:33 ` Oleg Nesterov
2025-01-14 14:56 ` Jiri Olsa [this message]
2025-01-14 17:25 ` Oleg Nesterov
2025-01-15 9:36 ` Jiri Olsa
2025-01-15 13:24 ` Eyal Birger
2025-01-15 13:25 ` Jiri Olsa
2025-01-15 15:06 ` Oleg Nesterov
2025-01-15 17:56 ` Alexei Starovoitov
2025-01-15 18:20 ` Andrii Nakryiko
2025-01-15 18:40 ` Oleg Nesterov
2025-01-15 18:48 ` Eyal Birger
2025-01-15 19:03 ` Oleg Nesterov
2025-01-15 21:14 ` Eyal Birger
2025-01-16 14:39 ` Oleg Nesterov
2025-01-16 14:47 ` Eyal Birger
2025-01-16 15:31 ` Oleg Nesterov
2025-01-16 17:11 ` Eyal Birger
2025-01-17 0:48 ` Oleg Nesterov
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