From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0692CCA47B for ; Thu, 14 Jul 2022 15:39:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240218AbiGNPjz (ORCPT ); Thu, 14 Jul 2022 11:39:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45828 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240383AbiGNPjp (ORCPT ); Thu, 14 Jul 2022 11:39:45 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id D09BDCDA for ; Thu, 14 Jul 2022 08:39:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1657813183; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=zXjUnaumkR0TOxe9lPH1tSh7D3NCENEIHeJQmON/pbA=; b=jADFrhz72RzL6wZGzqlfB/mH0W5CzQhMN7e3gpSKMjJueQt25f1ia3eYUMiR1aE3opS4He RkfZTN9EqhJHcnTEQkANo5dEHNuuC6BN1591TEFb7gXS/1h3hVB2Y0boUDUbxjOLh1javw N3Zft5t4XTPOPfrsMyjKvcnnvg2pNow= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-287-4TQ0Kp1aNDGpl-TJGT8Zhg-1; Thu, 14 Jul 2022 11:39:42 -0400 X-MC-Unique: 4TQ0Kp1aNDGpl-TJGT8Zhg-1 Received: by mail-wm1-f69.google.com with SMTP id q15-20020a05600c040f00b003a2e5c8fca3so2808432wmb.7 for ; Thu, 14 Jul 2022 08:39:42 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=zXjUnaumkR0TOxe9lPH1tSh7D3NCENEIHeJQmON/pbA=; b=DymSmjQ+x8RUn3uCSNqyP/xH4N1LGupWGLRvv4pa9CXb/05+bNG9Y/3W+NwZA/2Dxb Fveb5P8LHG92h0Ya0Q3/OYa+ZtncSCgW5t/N1r6x2uQYK8ZMQHyRUqKoBj7LEy9zDYAF 9yqm5rU4hD+VEA5GHNXqK+KifOpfaI8lqRT3W1Xi7hpi1Wx5Pu3h9YbbshIuAyStJFZ1 x4P4dOD9eQUIKsYs4e9rGCpX1+MNE6agr7QJS4gZgKDerjiXof/f9bNyi75EE1gicGoJ ve0QRkjAh4sdms1ob5xcPPDIw+MklbJQopjJpCksdwTZuuvJfrybGVwGWac24NtzVuSa DT2A== X-Gm-Message-State: AJIora9/uS0JeXRcE4BnLpzcgZCvpLDxcSeFOrWgvER5nhTKIdwRCG8g NZidf2CF1jF9WjW2lMUDmblwp4O74ky83Mvi6vcgCp2hydhD6GHojgyz34uo0L5GEu0rm4mhIcu 56Vj8Y3XHi95vF7pAudQafZhD X-Received: by 2002:a05:600c:206:b0:3a2:e224:da6f with SMTP id 6-20020a05600c020600b003a2e224da6fmr16099545wmi.167.1657813181598; Thu, 14 Jul 2022 08:39:41 -0700 (PDT) X-Google-Smtp-Source: AGRyM1umKj6lyufc2E/Zv8r5bdD3dbXIXniFnzkwkp6SxSbe6WGK2L1R/iMwFMU8NMI5GYg/lzZAtQ== X-Received: by 2002:a05:600c:206:b0:3a2:e224:da6f with SMTP id 6-20020a05600c020600b003a2e224da6fmr16099535wmi.167.1657813181427; Thu, 14 Jul 2022 08:39:41 -0700 (PDT) Received: from localhost (cpc111743-lutn13-2-0-cust979.9-3.cable.virginm.net. [82.17.115.212]) by smtp.gmail.com with ESMTPSA id a15-20020adffb8f000000b0021dbac444a7sm1742198wrr.59.2022.07.14.08.39.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Jul 2022 08:39:40 -0700 (PDT) From: Aaron Tomlin To: mcgrof@kernel.org, christophe.leroy@csgroup.eu Cc: linux-kernel@vger.kernel.org, linux-modules@vger.kernel.org, atomlin@atomlin.com, oleksandr@natalenko.name, neelx@redhat.com Subject: [PATCH v2 3/3] module: Show the last unloaded module's taint flag(s) Date: Thu, 14 Jul 2022 16:39:33 +0100 Message-Id: <20220714153933.2095776-4-atomlin@redhat.com> X-Mailer: git-send-email 2.34.3 In-Reply-To: <20220714153933.2095776-1-atomlin@redhat.com> References: <20220714153933.2095776-1-atomlin@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: For diagnostic purposes, this patch, in addition to keeping a record/or track of the last known unloaded module, we now will include the module's taint flag(s) too e.g: " [last unloaded: fpga_mgr_mod(OE)]" Signed-off-by: Aaron Tomlin --- kernel/module/main.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/kernel/module/main.c b/kernel/module/main.c index c5db13d06995..96ec7f94228d 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -524,7 +524,10 @@ static struct module_attribute modinfo_##field = { \ MODINFO_ATTR(version); MODINFO_ATTR(srcversion); -static char last_unloaded_module[MODULE_NAME_LEN+1]; +static struct { + char name[MODULE_NAME_LEN + 1]; + char taints[MODULE_FLAGS_BUF_SIZE]; +} last_unloaded_module; #ifdef CONFIG_MODULE_UNLOAD @@ -694,6 +697,7 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user, { struct module *mod; char name[MODULE_NAME_LEN]; + char buf[MODULE_FLAGS_BUF_SIZE]; int ret, forced = 0; if (!capable(CAP_SYS_MODULE) || modules_disabled) @@ -753,8 +757,9 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user, async_synchronize_full(); - /* Store the name of the last unloaded module for diagnostic purposes */ - strscpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); + /* Store the name and taints of the last unloaded module for diagnostic purposes */ + strscpy(last_unloaded_module.name, mod->name, sizeof(last_unloaded_module.name)); + strscpy(last_unloaded_module.taints, module_flags(mod, buf, false), sizeof(last_unloaded_module.taints)); free_module(mod); /* someone could wait for the module in add_unformed_module() */ @@ -3128,7 +3133,8 @@ void print_modules(void) print_unloaded_tainted_modules(); preempt_enable(); - if (last_unloaded_module[0]) - pr_cont(" [last unloaded: %s]", last_unloaded_module); + if (last_unloaded_module.name[0]) + pr_cont(" [last unloaded: %s%s]", last_unloaded_module.name, + last_unloaded_module.taints); pr_cont("\n"); } -- 2.34.3