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[37.110.38.130]) by smtp.googlemail.com with ESMTPSA id l26sm2185737lfj.22.2020.07.31.14.00.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 31 Jul 2020 14:00:34 -0700 (PDT) From: Denis Efremov To: Julia Lawall Date: Sat, 1 Aug 2020 00:00:26 +0300 Message-Id: <20200731210026.7186-1-efremov@linux.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200605204237.85055-1-efremov@linux.com> References: <20200605204237.85055-1-efremov@linux.com> MIME-Version: 1.0 X-Greylist: Sender IP whitelisted, Sender e-mail whitelisted, not delayed by milter-greylist-4.4.3 (isis.lip6.fr [132.227.60.2]); Fri, 31 Jul 2020 23:00:39 +0200 (CEST) X-Greylist: Sender DNS name whitelisted, not delayed by milter-greylist-4.4.3 (isis.lip6.fr [132.227.60.2]); Fri, 31 Jul 2020 23:00:36 +0200 (CEST) X-Scanned-By: MIMEDefang 2.78 on 132.227.60.2 X-Scanned-By: MIMEDefang 2.78 on 132.227.60.2 Cc: cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org Subject: [Cocci] [PATCH v6] coccinelle: api: add kvfree script X-BeenThere: cocci@systeme.lip6.fr X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: cocci-bounces@systeme.lip6.fr Errors-To: cocci-bounces@systeme.lip6.fr Check that alloc and free types of functions match each other. Signed-off-by: Denis Efremov --- Changes in v2: - Lines are limited to 80 characters where possible - Confidence changed from High to Medium because of fs/btrfs/send.c:1119 false-positive - __vmalloc_area_node() explicitly excluded from analysis instead of !(file in "mm/vmalloc.c") condition Changes in v3: - prints style in org && report modes changed for python2 Changes in v4: - missing msg argument to print_todo fixed Changes in v5: - fix position p in kfree rule - move @kok and @v positions in choice rule after the arguments - remove kvmalloc suggestions Changes in v6: - more asterisks added in context mode - second @kok added to the choice rule scripts/coccinelle/api/kvfree.cocci | 182 ++++++++++++++++++++++++++++ 1 file changed, 182 insertions(+) create mode 100644 scripts/coccinelle/api/kvfree.cocci diff --git a/scripts/coccinelle/api/kvfree.cocci b/scripts/coccinelle/api/kvfree.cocci new file mode 100644 index 000000000000..f43cda5b0d5b --- /dev/null +++ b/scripts/coccinelle/api/kvfree.cocci @@ -0,0 +1,182 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Check that kvmalloc'ed memory is freed by kfree functions, +/// vmalloc'ed by vfree functions and kvmalloc'ed by kvfree +/// functions. +/// +// Confidence: Medium +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// + +virtual patch +virtual report +virtual org +virtual context + +@initialize:python@ +@@ +# low-level memory api +filter = frozenset(['__vmalloc_area_node']) + +def relevant(p): + return not (filter & {el.current_element for el in p}) + +@choice@ +expression E, E1; +position kok, vok; +@@ + +( + if (...) { + ... + E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\| + kmalloc_node\|kzalloc_node\|kmalloc_array\| + kmalloc_array_node\|kcalloc_node\)(...)@kok + ... + } else { + ... + E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\| + vzalloc_node\|vmalloc_exec\|vmalloc_32\| + vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\| + __vmalloc_node\)(...)@vok + ... + } +| + E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\|kmalloc_node\|kzalloc_node\| + kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(...)@kok + ... when != E = E1 + when any + if (\(!E\|E == NULL\)) { + ... + E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\| + vzalloc_node\|vmalloc_exec\|vmalloc_32\| + vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\| + __vmalloc_node\)(...)@vok + ... + } +) + +@vfree depends on !patch@ +expression E; +position k != choice.kok; +position p; +@@ + +* E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\|kmalloc_node\| +* kzalloc_node\|kmalloc_array\|kmalloc_array_node\| +* kcalloc_node\)(...)@k + ... when != if (...) { ... E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\|vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\|__vmalloc_node\)(...); ... } + when != is_vmalloc_addr(E) + when any +* \(vfree\|vfree_atomic\|kvfree\)(E)@p + +@pvfree depends on patch exists@ +expression E; +position k != choice.kok; +@@ + + E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\|kmalloc_node\| + kzalloc_node\|kmalloc_array\|kmalloc_array_node\| + kcalloc_node\)(...)@k + ... when != if (...) { ... E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\|vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\|__vmalloc_node\)(...); ... } + when != is_vmalloc_addr(E) + when any +- \(vfree\|vfree_atomic\|kvfree\)(E) ++ kfree(E) + +@kfree depends on !patch@ +expression E; +position v != choice.vok; +position p; +@@ + +* E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\| +* vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\| +* __vmalloc_node_range\|__vmalloc_node\)(...)@v + ... when != !is_vmalloc_addr(E) + when any +* \(kfree\|kzfree\|kvfree\)(E)@p + +@pkfree depends on patch exists@ +expression E; +position v != choice.vok; +@@ + + E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\| + vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\| + __vmalloc_node_range\|__vmalloc_node\)(...)@v + ... when != !is_vmalloc_addr(E) + when any +- \(kfree\|kvfree\)(E) ++ vfree(E) + +@kvfree depends on !patch@ +expression E; +position p, k; +@@ + +* E = \(kvmalloc\|kvzalloc\|kvcalloc\|kvzalloc_node\|kvmalloc_node\| +* kvmalloc_array\)(...)@k + ... when != is_vmalloc_addr(E) + when any +* \(kfree\|kzfree\|vfree\|vfree_atomic\)(E)@p + +@pkvfree depends on patch exists@ +expression E; +@@ + + E = \(kvmalloc\|kvzalloc\|kvcalloc\|kvzalloc_node\|kvmalloc_node\| + kvmalloc_array\)(...) + ... when != is_vmalloc_addr(E) + when any +- \(kfree\|vfree\)(E) ++ kvfree(E) + +@script: python depends on report@ +k << vfree.k; +p << vfree.p; +@@ + +msg = "WARNING: kmalloc is used to allocate this memory at line %s" % (k[0].line) +coccilib.report.print_report(p[0], msg) + +@script: python depends on org@ +k << vfree.k; +p << vfree.p; +@@ + +msg = "WARNING: kmalloc is used to allocate this memory at line %s" % (k[0].line) +coccilib.org.print_todo(p[0], msg) + +@script: python depends on report@ +v << kfree.v; +p << kfree.p; +@@ + +msg = "WARNING: vmalloc is used to allocate this memory at line %s" % (v[0].line) +coccilib.report.print_report(p[0], msg) + +@script: python depends on org@ +v << kfree.v; +p << kfree.p; +@@ + +msg = "WARNING: vmalloc is used to allocate this memory at line %s" % (v[0].line) +coccilib.org.print_todo(p[0], msg) + +@script: python depends on report@ +k << kvfree.k; +p << kvfree.p; +@@ + +msg = "WARNING: kvmalloc is used to allocate this memory at line %s" % (k[0].line) +coccilib.report.print_report(p[0], msg) + +@script: python depends on org@ +k << kvfree.k; +p << kvfree.p; +@@ + +msg = "WARNING: kvmalloc is used to allocate this memory at line %s" % (k[0].line) +coccilib.org.print_todo(p[0], msg) -- 2.26.2 _______________________________________________ Cocci mailing list Cocci@systeme.lip6.fr https://systeme.lip6.fr/mailman/listinfo/cocci 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 X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4C78C433DF for ; Fri, 31 Jul 2020 21:00:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9423920829 for ; Fri, 31 Jul 2020 21:00:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728659AbgGaVAj (ORCPT ); Fri, 31 Jul 2020 17:00:39 -0400 Received: from mail-lj1-f194.google.com ([209.85.208.194]:39544 "EHLO mail-lj1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727053AbgGaVAi (ORCPT ); Fri, 31 Jul 2020 17:00:38 -0400 Received: by mail-lj1-f194.google.com with SMTP id z4so3338126ljj.6 for ; Fri, 31 Jul 2020 14:00:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=H/j7iupmhc9JT5gKdbzmUb9JaFhkdwdq+aVyKAG2Hh4=; b=VTl5UZrRfFnr05WRDFR/Zo2cdrLXI6rxnAHCiy+5QZx9UyBnDPOIw5+ZnHO85+msxM fuJzf2EBnQ1RRKwZYZlW0WeXVV3IzJtdX9pCKtILa8hJioV976l2qe+uVSSjirNhTLO5 n3qRBDrnOOpzeVc9WPM1TbAInggMm0pKXk6m6xJX80kKEQe0CHmoV+6hrYNQnrLVeemU Lw9NFCRcEmKueKM0jITsEXq5XL8ocBmKmVhQpZRe9Tu99TOKsiS9zo0H+4hUYJWenv6U Mh2uzkle9absTMF9RQiPibD5G6nUKhH2GeGWkUxN+ggeHhT3e2/S9g8p4fqkLXfjS98S nmZw== X-Gm-Message-State: AOAM53382Pjm5qydEhFJNDER98xuDywfjA0Ni22sOPw7No87r3ziE2DI CCtwFV0tTndZoFLIu6HW608= X-Google-Smtp-Source: ABdhPJyU6HRZNhCt1HodRVlUYGmY7ZMaWk3rCkzeVitfbC2eSQ4q3KdZJhg14l9MlU4DFehMIbJfyw== X-Received: by 2002:a2e:7019:: with SMTP id l25mr2350105ljc.256.1596229235438; Fri, 31 Jul 2020 14:00:35 -0700 (PDT) Received: from localhost.localdomain (broadband-37-110-38-130.ip.moscow.rt.ru. [37.110.38.130]) by smtp.googlemail.com with ESMTPSA id l26sm2185737lfj.22.2020.07.31.14.00.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 31 Jul 2020 14:00:34 -0700 (PDT) From: Denis Efremov To: Julia Lawall Cc: Denis Efremov , cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org Subject: [PATCH v6] coccinelle: api: add kvfree script Date: Sat, 1 Aug 2020 00:00:26 +0300 Message-Id: <20200731210026.7186-1-efremov@linux.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200605204237.85055-1-efremov@linux.com> References: <20200605204237.85055-1-efremov@linux.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Check that alloc and free types of functions match each other. Signed-off-by: Denis Efremov --- Changes in v2: - Lines are limited to 80 characters where possible - Confidence changed from High to Medium because of fs/btrfs/send.c:1119 false-positive - __vmalloc_area_node() explicitly excluded from analysis instead of !(file in "mm/vmalloc.c") condition Changes in v3: - prints style in org && report modes changed for python2 Changes in v4: - missing msg argument to print_todo fixed Changes in v5: - fix position p in kfree rule - move @kok and @v positions in choice rule after the arguments - remove kvmalloc suggestions Changes in v6: - more asterisks added in context mode - second @kok added to the choice rule scripts/coccinelle/api/kvfree.cocci | 182 ++++++++++++++++++++++++++++ 1 file changed, 182 insertions(+) create mode 100644 scripts/coccinelle/api/kvfree.cocci diff --git a/scripts/coccinelle/api/kvfree.cocci b/scripts/coccinelle/api/kvfree.cocci new file mode 100644 index 000000000000..f43cda5b0d5b --- /dev/null +++ b/scripts/coccinelle/api/kvfree.cocci @@ -0,0 +1,182 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Check that kvmalloc'ed memory is freed by kfree functions, +/// vmalloc'ed by vfree functions and kvmalloc'ed by kvfree +/// functions. +/// +// Confidence: Medium +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// + +virtual patch +virtual report +virtual org +virtual context + +@initialize:python@ +@@ +# low-level memory api +filter = frozenset(['__vmalloc_area_node']) + +def relevant(p): + return not (filter & {el.current_element for el in p}) + +@choice@ +expression E, E1; +position kok, vok; +@@ + +( + if (...) { + ... + E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\| + kmalloc_node\|kzalloc_node\|kmalloc_array\| + kmalloc_array_node\|kcalloc_node\)(...)@kok + ... + } else { + ... + E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\| + vzalloc_node\|vmalloc_exec\|vmalloc_32\| + vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\| + __vmalloc_node\)(...)@vok + ... + } +| + E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\|kmalloc_node\|kzalloc_node\| + kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(...)@kok + ... when != E = E1 + when any + if (\(!E\|E == NULL\)) { + ... + E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\| + vzalloc_node\|vmalloc_exec\|vmalloc_32\| + vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\| + __vmalloc_node\)(...)@vok + ... + } +) + +@vfree depends on !patch@ +expression E; +position k != choice.kok; +position p; +@@ + +* E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\|kmalloc_node\| +* kzalloc_node\|kmalloc_array\|kmalloc_array_node\| +* kcalloc_node\)(...)@k + ... when != if (...) { ... E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\|vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\|__vmalloc_node\)(...); ... } + when != is_vmalloc_addr(E) + when any +* \(vfree\|vfree_atomic\|kvfree\)(E)@p + +@pvfree depends on patch exists@ +expression E; +position k != choice.kok; +@@ + + E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\|kmalloc_node\| + kzalloc_node\|kmalloc_array\|kmalloc_array_node\| + kcalloc_node\)(...)@k + ... when != if (...) { ... E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\|vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\|__vmalloc_node\)(...); ... } + when != is_vmalloc_addr(E) + when any +- \(vfree\|vfree_atomic\|kvfree\)(E) ++ kfree(E) + +@kfree depends on !patch@ +expression E; +position v != choice.vok; +position p; +@@ + +* E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\| +* vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\| +* __vmalloc_node_range\|__vmalloc_node\)(...)@v + ... when != !is_vmalloc_addr(E) + when any +* \(kfree\|kzfree\|kvfree\)(E)@p + +@pkfree depends on patch exists@ +expression E; +position v != choice.vok; +@@ + + E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\| + vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\| + __vmalloc_node_range\|__vmalloc_node\)(...)@v + ... when != !is_vmalloc_addr(E) + when any +- \(kfree\|kvfree\)(E) ++ vfree(E) + +@kvfree depends on !patch@ +expression E; +position p, k; +@@ + +* E = \(kvmalloc\|kvzalloc\|kvcalloc\|kvzalloc_node\|kvmalloc_node\| +* kvmalloc_array\)(...)@k + ... when != is_vmalloc_addr(E) + when any +* \(kfree\|kzfree\|vfree\|vfree_atomic\)(E)@p + +@pkvfree depends on patch exists@ +expression E; +@@ + + E = \(kvmalloc\|kvzalloc\|kvcalloc\|kvzalloc_node\|kvmalloc_node\| + kvmalloc_array\)(...) + ... when != is_vmalloc_addr(E) + when any +- \(kfree\|vfree\)(E) ++ kvfree(E) + +@script: python depends on report@ +k << vfree.k; +p << vfree.p; +@@ + +msg = "WARNING: kmalloc is used to allocate this memory at line %s" % (k[0].line) +coccilib.report.print_report(p[0], msg) + +@script: python depends on org@ +k << vfree.k; +p << vfree.p; +@@ + +msg = "WARNING: kmalloc is used to allocate this memory at line %s" % (k[0].line) +coccilib.org.print_todo(p[0], msg) + +@script: python depends on report@ +v << kfree.v; +p << kfree.p; +@@ + +msg = "WARNING: vmalloc is used to allocate this memory at line %s" % (v[0].line) +coccilib.report.print_report(p[0], msg) + +@script: python depends on org@ +v << kfree.v; +p << kfree.p; +@@ + +msg = "WARNING: vmalloc is used to allocate this memory at line %s" % (v[0].line) +coccilib.org.print_todo(p[0], msg) + +@script: python depends on report@ +k << kvfree.k; +p << kvfree.p; +@@ + +msg = "WARNING: kvmalloc is used to allocate this memory at line %s" % (k[0].line) +coccilib.report.print_report(p[0], msg) + +@script: python depends on org@ +k << kvfree.k; +p << kvfree.p; +@@ + +msg = "WARNING: kvmalloc is used to allocate this memory at line %s" % (k[0].line) +coccilib.org.print_todo(p[0], msg) -- 2.26.2