From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3649C232437 for ; Tue, 14 Jan 2025 14:33:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736865236; cv=none; b=eHmsPvlGx7XkoAslKzusEZYKkHgQf2GOKL11jzg7/hQjKYNBnDVHq2QsIR+Lqigo3WBZIZHBjF449jkaaGi6isbzljsyUiPYItAmXtxZsb7HhE0Vd88UliDe4VVilpNmFUpFhMUZFSDqNh6zlqjAfkX6FDaLTTULrmtA94U4nIQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736865236; c=relaxed/simple; bh=oddR/gelENrIf6SSztK+uDEMTE6hY5HnjBgwfhyOM5I=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=fUIuYolLCNjk1+7qUTYbGN8Ssz03qOxI3TFNYc46pe3JhWeGCQeIw5cxLeeWTsG15FIFNVBDLZAQMOfCGmgJ3CxYLg+7jnXBRqz9oiPZ1wOS/k/wFy2e00nD3e2SDD/tYtt1AfGM+EKPhxC+A3qxSYn/HQh4kepe5mXMHzeXHkI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=UOOUU62m; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="UOOUU62m" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1736865234; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=oddR/gelENrIf6SSztK+uDEMTE6hY5HnjBgwfhyOM5I=; b=UOOUU62mnW8NbjazSVM8QBoEOoxnxqEuK/RZnmhAOAuw7i2+G3kVhAXj/TP1d7/gEs9y52 Qiez0lBdL6+SJAT4wLnKuaDCJEbhlsXCuGVO3N3LlM0JORYqayPIPPDzya7Vk6LY7p80Pu +pMBApQ4pKIu2GYCnYZZ3NJUXihqWno= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-548-k3xF3taEPD6_gbe9srkPWg-1; Tue, 14 Jan 2025 09:33:50 -0500 X-MC-Unique: k3xF3taEPD6_gbe9srkPWg-1 X-Mimecast-MFC-AGG-ID: k3xF3taEPD6_gbe9srkPWg Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 955861956050; Tue, 14 Jan 2025 14:33:47 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.45.226.88]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with SMTP id C39C3195608A; Tue, 14 Jan 2025 14:33:39 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Tue, 14 Jan 2025 15:33:22 +0100 (CET) Date: Tue, 14 Jan 2025 15:33:13 +0100 From: Oleg Nesterov To: Eyal Birger Cc: Jiri Olsa , Aleksa Sarai , mhiramat@kernel.org, linux-kernel , linux-trace-kernel@vger.kernel.org, BPF-dev-list , Song Liu , Yonghong Song , John Fastabend , peterz@infradead.org, tglx@linutronix.de, bp@alien8.de, x86@kernel.org, linux-api@vger.kernel.org, Andrii Nakryiko , Daniel Borkmann , Alexei Starovoitov , Andrii Nakryiko , "rostedt@goodmis.org" , rafi@rbk.io, Shmulik Ladkani Subject: Re: Crash when attaching uretprobes to processes running in Docker Message-ID: <20250114143313.GA29305@redhat.com> References: <20250110.152323-sassy.torch.lavish.rent-vKX3ul5B3qyi@cyphar.com> Precedence: bulk X-Mailing-List: linux-api@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 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) :/ Oleg.