From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-1185227-1520621756-5-14572933062838357200 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='net', MailFrom='org' X-Spam-charsets: X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-api-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1520621756; b=b6Rd01CcfnQoQbgUvkKVi/vvjA45FPqSLxaqNFFhRjjOh3p F4B1MEtAjvoLXLamTIKCr8ClzLo+5jK6/FUcbs+xZWTNEEYPy8YIAKart44/9+e+ gtl7mAtz7YfXtsfGLPBoUk8Ap9wWXUgsuSjKBt/pXLQN+xYCZDC29GusqFUiXPt5 tSdH2w/biT2CzSXv1fyU77pMEb5XMTAxYK1L4odb+fygvPYEbAs+/i98zY5KYkSX HZBKeoju3SKCnjcMGeTNk6a5/2MYd1KPu4t5q/tN+iv+AkwlIMgqzLOSu0K23ByL xQ7n8w6ix1cCb1pyDByOr9MjrFOQt9DA5mIvFjw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=date:message-id:to:cc:subject:from :in-reply-to:references:mime-version:content-type :content-transfer-encoding:sender:list-id; s=arctest; t= 1520621756; bh=me7yE+dbY6QB3pa17XgNyN7oJ0Z6rPfXVKI+Kj0pDe4=; b=a Bcxu3qbDRIkhQuCkJoN4Ij2OJb1U0uZsFeti76oFxcOAjhTRG/7IueCVR4tfzqwu 5EARl9mXzKzvoMART2KkAFgGgrJPzetr5rVir9bsr+1Lk1cobAbNGNW2Mj7HUhAb YD5IBbD1d6F98cMLSZY7QtXh/vjtvahRr+SeN56SHyIB4bVh36tSBtVp/JV7y21m pcfim5RjxzwpG0mqcGT9hc5DejTGeAc8ZInJx+oVbJvNr+rM3xT5hugApnnWw4Yg I/TpTNgBncnCXRbfQMQ1oGiQtC0vEBxZzzcPehx5jDpcNnmCR4pmZUg0VqCCxLB8 2T5V5nGMZAgWr5Augy08Q== ARC-Authentication-Results: i=1; mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=davemloft.net; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-category=clean score=0 state=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=davemloft.net header.result=pass header_is_org_domain=yes Authentication-Results: mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=davemloft.net; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-category=clean score=0 state=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=davemloft.net header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932304AbeCISzy (ORCPT ); Fri, 9 Mar 2018 13:55:54 -0500 Received: from shards.monkeyblade.net ([184.105.139.130]:55228 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932230AbeCISzx (ORCPT ); Fri, 9 Mar 2018 13:55:53 -0500 Date: Fri, 09 Mar 2018 13:55:50 -0500 (EST) Message-Id: <20180309.135550.385837861865623769.davem@davemloft.net> To: ast@fb.com Cc: luto@amacapital.net, gregkh@linuxfoundation.org, luto@kernel.org, torvalds@linux-foundation.org, keescook@chromium.org, ast@kernel.org, tixxdz@gmail.com, viro@zeniv.linux.org.uk, daniel@iogearbox.net, mcgrof@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com, linux-api@vger.kernel.org Subject: Re: [PATCH net-next] modules: allow modprobe load regular elf binaries From: David Miller In-Reply-To: <74e26cc0-9e72-f03b-5396-f3480921f234@fb.com> References: <20180309181527.GA15803@kroah.com> <74e26cc0-9e72-f03b-5396-f3480921f234@fb.com> X-Mailer: Mew version 6.7 on Emacs 25.3 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-api-owner@vger.kernel.org X-Mailing-List: linux-api@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Alexei Starovoitov Date: Fri, 9 Mar 2018 10:50:49 -0800 > On 3/9/18 10:23 AM, Andy Lutomirski wrote: >> It might not be totally crazy to back it by tmpfs. > > interesting. how do you propose to do it? > Something like: > - create /umh_module_tempxxx dir > - mount tmpfs there > - copy elf into it and exec it? I think the idea is that it's an internal tmpfs mount that only the kernel has access too. And I don't think that even hurts your debuggability concerns. The user can just attach using the foo.ko file in the actual filesystem.