X-Loop: help-debbugs@HIDDEN Subject: bug#72251: defect found by covscan in diffutils-3.10 (gnulibs) Resent-From: Wasser Mai <wasser19641@HIDDEN> Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> Resent-CC: bug-diffutils@HIDDEN Resent-Date: Tue, 23 Jul 2024 06:39:01 +0000 Resent-Message-ID: <handler.72251.B.172171672228954 <at> debbugs.gnu.org> Resent-Sender: help-debbugs@HIDDEN X-GNU-PR-Message: report 72251 X-GNU-PR-Package: diffutils X-GNU-PR-Keywords: To: 72251 <at> debbugs.gnu.org X-Debbugs-Original-To: bug-diffutils@HIDDEN Received: via spool by submit <at> debbugs.gnu.org id=B.172171672228954 (code B ref -1); Tue, 23 Jul 2024 06:39:01 +0000 Received: (at submit) by debbugs.gnu.org; 23 Jul 2024 06:38:42 +0000 Received: from localhost ([127.0.0.1]:59012 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1sW9AV-0007Wt-SH for submit <at> debbugs.gnu.org; Tue, 23 Jul 2024 02:38:42 -0400 Received: from lists.gnu.org ([209.51.188.17]:42904) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <wasser19641@HIDDEN>) id 1sVwr0-0000bg-NQ for submit <at> debbugs.gnu.org; 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Mon, 22 Jul 2024 10:29:29 -0700 (PDT) MIME-Version: 1.0 From: Wasser Mai <wasser19641@HIDDEN> Date: Mon, 22 Jul 2024 19:29:18 +0200 Message-ID: <CAGS-GNbBYwkPhAi_1J27rbEtzFmvQ48RiCLfKttsAoRfo89YDA@HIDDEN> Content-Type: text/plain; charset="UTF-8" Received-SPF: pass client-ip=2a00:1450:4864:20::12f; envelope-from=wasser19641@HIDDEN; helo=mail-lf1-x12f.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.1 (-) X-Mailman-Approved-At: Tue, 23 Jul 2024 02:38:38 -0400 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: 0.2 (/) There's a following defect in diffutils-3.10 (gnulib) found by covscan. The memory dfa->eclosure points to is not initialized. It looks like a true positive. Error: UNINIT (CWE-457): diffutils-3.10/lib/regcomp.c:1134: alloc_fn: Calling "malloc" which returns uninitialized memory. diffutils-3.10/lib/regcomp.c:1134: assign: Assigning: "dfa->eclosures" = "(re_node_set *)malloc(dfa->nodes_alloc * 24UL)", which points to uninitialized data. diffutils-3.10/lib/regcomp.c:1177: uninit_use_in_call: Using uninitialized value "dfa->eclosures->elems" when calling "calc_inveclosure". diffutils-3.10/lib/regcomp.c:1177: uninit_use_in_call: Using uninitialized value "dfa->eclosures->nelem" when calling "calc_inveclosure". # 1226| if (__glibc_unlikely (dfa->inveclosures == NULL)) # 1227| return REG_ESPACE; # 1228|-> ret = calc_inveclosure (dfa); # 1229| } # 1230| maybe add a loop to iterate through all elements and call re_node_set_init_empty to initialize each element like this? diff -up diffutils-3.10/lib/regcomp.c.orig diffutils-3.10/lib/regcomp.c --- diffutils-3.10/lib/regcomp.c.orig 2024-07-22 19:06:27.783986757 +0200 +++ diffutils-3.10/lib/regcomp.c 2024-07-22 19:10:41.303397164 +0200 @@ -1136,6 +1136,10 @@ analyze (regex_t *preg) || dfa->edests == NULL || dfa->eclosures == NULL)) return REG_ESPACE; + // Initialize each element (for example, set them all to an empty node set) + for (Idx i = 0; i < dfa->nodes_alloc; ++i) { + re_node_set_init_empty(dfa->eclosures + i); + } dfa->subexp_map = re_malloc (Idx, preg->re_nsub); if (dfa->subexp_map != NULL) { Thanks! Wasser
Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Mailer: MIME-tools 5.505 (Entity 5.505) Content-Type: text/plain; charset=utf-8 X-Loop: help-debbugs@HIDDEN From: help-debbugs@HIDDEN (GNU bug Tracking System) To: Wasser Mai <wasser19641@HIDDEN> Subject: bug#72251: Acknowledgement (defect found by covscan in diffutils-3.10 (gnulibs)) Message-ID: <handler.72251.B.172171672228954.ack <at> debbugs.gnu.org> References: <CAGS-GNbBYwkPhAi_1J27rbEtzFmvQ48RiCLfKttsAoRfo89YDA@HIDDEN> X-Gnu-PR-Message: ack 72251 X-Gnu-PR-Package: diffutils Reply-To: 72251 <at> debbugs.gnu.org Date: Tue, 23 Jul 2024 06:39:01 +0000 Thank you for filing a new bug report with debbugs.gnu.org. This is an automatically generated reply to let you know your message has been received. Your message is being forwarded to the package maintainers and other interested parties for their attention; they will reply in due course. Your message has been sent to the package maintainer(s): bug-diffutils@HIDDEN If you wish to submit further information on this problem, please send it to 72251 <at> debbugs.gnu.org. Please do not send mail to help-debbugs@HIDDEN unless you wish to report a problem with the Bug-tracking system. --=20 72251: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D72251 GNU Bug Tracking System Contact help-debbugs@HIDDEN with problems
X-Loop: help-debbugs@HIDDEN Subject: bug#72251: [bug-diffutils] bug#72251: defect found by covscan in diffutils-3.10 (gnulibs) Resent-From: Paul Eggert <eggert@HIDDEN> Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> Resent-CC: bug-diffutils@HIDDEN Resent-Date: Thu, 25 Jul 2024 05:38:02 +0000 Resent-Message-ID: <handler.72251.B72251.17218858759075 <at> debbugs.gnu.org> Resent-Sender: help-debbugs@HIDDEN X-GNU-PR-Message: followup 72251 X-GNU-PR-Package: diffutils X-GNU-PR-Keywords: To: Wasser Mai <wasser19641@HIDDEN> Cc: 72251 <at> debbugs.gnu.org Received: via spool by 72251-submit <at> debbugs.gnu.org id=B72251.17218858759075 (code B ref 72251); Thu, 25 Jul 2024 05:38:02 +0000 Received: (at 72251) by debbugs.gnu.org; 25 Jul 2024 05:37:55 +0000 Received: from localhost ([127.0.0.1]:35161 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1sWrAo-0002MI-L3 for submit <at> debbugs.gnu.org; Thu, 25 Jul 2024 01:37:54 -0400 Received: from mail.cs.ucla.edu ([131.179.128.66]:41972) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eggert@HIDDEN>) id 1sWrAm-0002Lv-BG for 72251 <at> debbugs.gnu.org; Thu, 25 Jul 2024 01:37:53 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id 459113C00E400; Wed, 24 Jul 2024 22:37:39 -0700 (PDT) Received: from mail.cs.ucla.edu ([127.0.0.1]) by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10032) with ESMTP id 8pChHtuOaSth; Wed, 24 Jul 2024 22:37:39 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id 012973C00E401; Wed, 24 Jul 2024 22:37:39 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.cs.ucla.edu 012973C00E401 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cs.ucla.edu; s=9D0B346E-2AEB-11ED-9476-E14B719DCE6C; t=1721885859; bh=szRiSdF+g4btRjp3No6JhwNbg4plkhJtTdaqaQI6TW4=; h=Message-ID:Date:MIME-Version:To:From; b=cMrK4ElSUl8KRiGsawtpB+RUsk6hZr2tbJJ6S173jYVkk88LOUClIrExozxZuPWjQ U4HlobAAw9qoHNEiAJXqXdfL6sI50vd9y9r45i2Y9x2AWGLCny7kkF6xrIgrxT90mp w9EiLTepLoqLyXjDaFnyDRJKv+NLxcRkwNgd7aPPxC7UA1udtmWbHnWDcfXdlQVXmL FawEav+KhnsC1Wm/r2zpEjA4Wxys/J9hSryDm+639krxRBncw/98uuDrot2iq6fvxJ EWQStvKZ2QMYVP9otu0JwzkgAsY4DSYm2WEUS2slQMtLP2wJPNEafdEeKuVS0Phmqe luZNBSqXdicuQ== X-Virus-Scanned: amavis at mail.cs.ucla.edu Received: from mail.cs.ucla.edu ([127.0.0.1]) by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10026) with ESMTP id 1RmpRFGQnWCv; Wed, 24 Jul 2024 22:37:38 -0700 (PDT) Received: from [192.168.254.12] (unknown [47.154.17.165]) by mail.cs.ucla.edu (Postfix) with ESMTPSA id D53B33C00E400; Wed, 24 Jul 2024 22:37:38 -0700 (PDT) Message-ID: <76b3590d-495e-47cf-a886-ca188ed33153@HIDDEN> Date: Wed, 24 Jul 2024 22:37:38 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird References: <CAGS-GNbBYwkPhAi_1J27rbEtzFmvQ48RiCLfKttsAoRfo89YDA@HIDDEN> Content-Language: en-US From: Paul Eggert <eggert@HIDDEN> Organization: UCLA Computer Science Department In-Reply-To: <CAGS-GNbBYwkPhAi_1J27rbEtzFmvQ48RiCLfKttsAoRfo89YDA@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: 0.0 (/) X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) On 2024-07-22 10:29, Wasser Mai wrote: > There's a following defect in diffutils-3.10 (gnulib) found by > covscan. The memory dfa->eclosure points to is not initialized. It > looks like a true positive. It doesn't look like a true positive to me. The 'postorder' function initializes that memory, but covscan isn't smart enough to see that. These days almost everything Coverity reports for core GNU utilities is a false positive, unfortunately.
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Received: (at control) by debbugs.gnu.org; 24 Mar 2025 23:29:07 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Mar 24 19:29:07 2025 Received: from localhost ([127.0.0.1]:60694 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1twrEB-0005AW-Ae for submit <at> debbugs.gnu.org; Mon, 24 Mar 2025 19:29:07 -0400 Received: from mail.cs.ucla.edu ([131.179.128.66]:35488) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <eggert@HIDDEN>) id 1twrE7-00059l-Kp for control <at> debbugs.gnu.org; Mon, 24 Mar 2025 19:29:04 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id 09C133C011BD8 for <control <at> debbugs.gnu.org>; Mon, 24 Mar 2025 16:28:58 -0700 (PDT) Received: from mail.cs.ucla.edu ([127.0.0.1]) by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10032) with ESMTP id JfA9VVvzWnV6 for <control <at> debbugs.gnu.org>; 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GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.