From debbugs-submit-bounces@debbugs.gnu.org Thu Jan 16 11:19:32 2025 Received: (at submit) by debbugs.gnu.org; 16 Jan 2025 16:19:32 +0000 Received: from localhost ([127.0.0.1]:34391 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tYSah-0005K0-Sy for submit@debbugs.gnu.org; Thu, 16 Jan 2025 11:19:32 -0500 Received: from lists.gnu.org ([2001:470:142::17]:40022) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1tYSaf-0005Ji-Fp for submit@debbugs.gnu.org; Thu, 16 Jan 2025 11:19:30 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tYSaB-0008VX-Pq for bug-coreutils@gnu.org; Thu, 16 Jan 2025 11:19:05 -0500 Received: from mo4-p00-ob.smtp.rzone.de ([85.215.255.25]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tYSa9-0006XK-7f for bug-coreutils@gnu.org; Thu, 16 Jan 2025 11:18:59 -0500 ARC-Seal: i=1; a=rsa-sha256; t=1737044333; cv=none; d=strato.com; s=strato-dkim-0002; b=d1+l5fhlQxKpqwJN9IFzGdnYVSBFJnJC3PerSRAV5m2VsCVwT9ttCRToio9orVYmwY otEp1bI3NnhZ9PHL1cLybbSwGhh+MzrVT/zoaCZWJHJe5EM+gMO40TQVWuJKW4C4jciI +t3dFU99gGiKuY2CHjmoXxXsd/MLa8HqzewiNnHAibA2AYfDsLbAnaMLfXjdWzzXBcfG q0zI+hGzhOhmBqSqJwfh/xoQOiXwd4euxc+ZvLeXkjf6XhcAve3likK7o/+V4mBlHNrb 4OzMRhu7pUkuEbPDWHFnGLAzI+ZtYgCVaxdEK49oXg5kLT2k9kqznxYmrIu23xDc4Yfj v8XQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; t=1737044333; s=strato-dkim-0002; d=strato.com; h=Message-ID:Date:Subject:To:From:Cc:Date:From:Subject:Sender; bh=a/LLntzfuEPyCke1zpVrTCYPT8yeHSzXNy9BgB4eVXI=; b=sv+73PS43jN+yeD3mqe5KNZdWXtNWnTxuDc8QKbdsKauZfhUKbo8L6LyIAgiLRfmU5 82BoMAe5hJJvfzbZ501Bg64LzxnZgrmX5fAfE2MUWCeUtGgsXSP7tXVwHxPUeHQ2siCw eXJnIOnuAkdfOuaqruldFWSTJh/h/EKw3nw/Bg0UUDtZcsiEkay6NUD/6HNXjlgqfMCJ NcNCoijEKS5ScR0mTbaMWLk04kmgLJk5OgxugkR3f4VtFwHfXiPLjN/bEpndBZQ9w16j j4DkTtviI9lcbJII2mwrX6mObalAPbHjaIUA1DNO+0P+v5/e1CyvvtHYCel0pqOqa5+k pCGw== ARC-Authentication-Results: i=1; strato.com; arc=none; dkim=none X-RZG-CLASS-ID: mo00 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1737044333; s=strato-dkim-0002; d=clisp.org; h=Message-ID:Date:Subject:To:From:Cc:Date:From:Subject:Sender; bh=a/LLntzfuEPyCke1zpVrTCYPT8yeHSzXNy9BgB4eVXI=; b=oXImJxBLLmP+LjkxzYa2jUYqeHGTKDZxrN+YgYJgCA6g1+pK9bF8ETGiofyX7gPdMk eX+qvTbvCi3TwZQBjn7QxiiL11V4xG13ldpq6z4B4+TCEhnrCjlV/z3RAcAByOVo75Ay /OIw3Ek988zpBhNfkkUcCQkcs2kNIlI+SlayV8OhQDy+SJdtiq+EKf4Bh0sEicqm24vU SYPB/dyZpFpkVUv0RplRpUDBG/kPrk+gIYwLVLkOVprDp4iATpz5iN6hHPgAcuCUKlIy xB6iWejJ5ehPfd7Pr0zJFMRC2FKDSz0gz/CT6iGOuGU99n86ssdaa9hhJdIV+S2/dh/H ektw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; t=1737044333; s=strato-dkim-0003; d=clisp.org; h=Message-ID:Date:Subject:To:From:Cc:Date:From:Subject:Sender; bh=a/LLntzfuEPyCke1zpVrTCYPT8yeHSzXNy9BgB4eVXI=; b=hZuvA4k2Uyrmhk4LNQ9O0koYPrdp4Hn3N6Xs+DikIL+S1gOeFm0s4fb72/Qgy+I9sd Rhwi17wUvtmbb30KlbAg== X-RZG-AUTH: ":Ln4Re0+Ic/6oZXR1YgKryK8brlshOcZlLnY4jECd2hdUURIbZgL8PX2QiTuZ3cdB8X/nqm+ZFDrj427esj3ggT1Yh0+bzw7B" Received: from nimes.localnet by smtp.strato.de (RZmta 51.2.17 AUTH) with ESMTPSA id N6df4210GGIr2pQ (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Thu, 16 Jan 2025 17:18:53 +0100 (CET) From: Bruno Haible To: bug-coreutils@gnu.org Subject: undefined behaviour in sort.c Date: Thu, 16 Jan 2025 17:18:53 +0100 Message-ID: <5399074.FjVNtL66Cm@nimes> Organization: GNU MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Received-SPF: none client-ip=85.215.255.25; envelope-from=bruno@clisp.org; helo=mo4-p00-ob.smtp.rzone.de X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Testing the current coreutils with the current gnulib, there is an undefined behaviour in sort.c, in or around the functions debug_line debug_key debug_width ------------------------------------------------------------------------------ Found by building on Ubuntu 24.04, with clang 19, CC="clang -fsanitize=address,undefined,signed-integer-overflow,shift,integer-divide-by-zero -fno-sanitize-recover=undefined" and running the test suite. The log shows this: + printf 'A\tchr10\nB\tchr1\n' + sort -s -k2.4b,2.3n --debug sort: text ordering performed using simple byte comparison sort: leading blanks are significant in key 1; consider also specifying 'b' sort: note numbers use '.' as a decimal point in this locale ../lib/mbswidth.c:60:26: runtime error: addition of unsigned offset to 0x76f80b601805 overflowed to 0x76f80b601804 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../lib/mbswidth.c:60:26 ../tests/sort/sort-debug-keys.sh: line 292: 345166 Done printf 'A\tchr10\nB\tchr1\n' 345167 Aborted | sort -s -k2.4b,2.3n --debug ------------------------------------------------------------------------------ How to reproduce without clang and UBSAN: $ printf 'A\tchr10\nB\tchr1\n' > in $ gdb src/sort (gdb) break mbsnwidth (gdb) run -s -k2.4b,2.3n --debug < in The first time the mbsnwidth function is invoked: Breakpoint 1, mbsnwidth (string=0x51d000000a80 "A\tchr10", nbytes=5, flags=0) at ../lib/mbswidth.c:59 The second time the mbsnwidth function is invoked: Breakpoint 1, mbsnwidth (string=0x51d000000a85 "10", nbytes=18446744073709551615, flags=0) at ../lib/mbswidth.c:59 The nbytes value is obviously bogus. The documentation of mbsnwidth() says: /* Returns the number of screen columns needed for the NBYTES bytes starting at BUF. */ extern int mbsnwidth (const char *buf, size_t nbytes, int flags); Stack trace at the second invocation: (gdb) where #0 mbsnwidth (string=0x51d000000a85 "10", nbytes=18446744073709551615, flags=0) at ../lib/mbswidth.c:59 #1 0x00005555556bff9e in debug_width (text=0x51d000000a85 "10", lim=0x51d000000a84 "r10") at ../src/sort.c:2326 #2 0x00005555556bfee6 in debug_key (line=0x51d000001280, key=0x5070000001e0) at ../src/sort.c:2415 #3 0x00005555556beabc in debug_line (line=0x51d000001280) at ../src/sort.c:2427 #4 0x00005555556b487f in write_line (line=0x51d000001280, fp=0x7ffff78045c0 <_IO_2_1_stdout_>, output_file=0x0) at ../src/sort.c:2942 #5 0x00005555556cc3be in write_unique (line=0x51d000001280, tfp=0x7ffff78045c0 <_IO_2_1_stdout_>, temp_output=0x0) at ../src/sort.c:3577 #6 0x00005555556d15c8 in mergelines_node (node=0x51d000001500, total_lines=2, tfp=0x7ffff78045c0 <_IO_2_1_stdout_>, temp_output=0x0) at ../src/sort.c:3624 #7 0x00005555556cf27f in merge_loop (queue=0x7ffff59096c0, total_lines=2, tfp=0x7ffff78045c0 <_IO_2_1_stdout_>, temp_output=0x0) at ../src/sort.c:3708 #8 0x00005555556cbff7 in sortlines (lines=0x51d0000012a0, nthreads=8, total_lines=2, node=0x51d000001500, queue=0x7ffff59096c0, tfp=0x7ffff78045c0 <_IO_2_1_stdout_>, temp_output=0x0) at ../src/sort.c:3825 #9 0x00005555556ae58f in sort (files=0x502000000418, nfiles=0, output_file=0x0, nthreads=8) at ../src/sort.c:4124 #10 0x00005555556a2d20 in main (argc=4, argv=0x7fffffffd0c8) at ../src/sort.c:4900 Bruno From debbugs-submit-bounces@debbugs.gnu.org Thu Jan 16 12:24:38 2025 Received: (at 75606-done) by debbugs.gnu.org; 16 Jan 2025 17:24:38 +0000 Received: from localhost ([127.0.0.1]:34499 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tYTbi-0008Hi-9O for submit@debbugs.gnu.org; Thu, 16 Jan 2025 12:24:38 -0500 Received: from mail.cs.ucla.edu ([131.179.128.66]:36202) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1tYTbg-0008HM-00 for 75606-done@debbugs.gnu.org; Thu, 16 Jan 2025 12:24:36 -0500 Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id AB8DF3C082EAA; Thu, 16 Jan 2025 09:24:29 -0800 (PST) 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 v5pTATC4EVjz; Thu, 16 Jan 2025 09:24:29 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id 5A2753C082EB0; Thu, 16 Jan 2025 09:24:29 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.cs.ucla.edu 5A2753C082EB0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cs.ucla.edu; s=9D0B346E-2AEB-11ED-9476-E14B719DCE6C; t=1737048269; bh=5Ebj92rXsa0aWKOkQ++rsibomn8r5yYvqJ1Ft65+2X0=; h=Message-ID:Date:MIME-Version:To:From; b=iVfGujtFRqeyS0uCgMKdrcd2tfM4tGuyFQse4TnXnMktxY6tWrBag73zpBWUXHprM oar2c7VL31XDamKTXzszVl7tqFNaJMVAqxWSU8j8SR2WG6VbzntwiA0NXplbzzwhm8 UobkmUycxRZ3oUYET87FqUx3DeuChR4zmKXln2PEZsR4X9pDiaLkHbG/MLwqFilVad zTFWX9y+vR3FPTsqHdqNCOUwY24pYhUaCQGaJuKjlRmVxSjbhbB2eiX69+Pr+X7Ra9 Luxh/0PRuTVvv9JDZz4yxD2acz+Q2yt5W/KMSdws7MhTl9APAFImWrBYeh41PDFRif nDyKP3mrrbEVg== 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 cPln-gaJXxRW; Thu, 16 Jan 2025 09:24:29 -0800 (PST) Received: from [192.168.254.12] (unknown [47.154.28.214]) by mail.cs.ucla.edu (Postfix) with ESMTPSA id 3D5653C082EAA; Thu, 16 Jan 2025 09:24:29 -0800 (PST) Content-Type: multipart/mixed; boundary="------------TMBElAH5JauMJgXqtP6Zyo3A" Message-ID: Date: Thu, 16 Jan 2025 09:24:29 -0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: bug#75606: undefined behaviour in sort.c To: Bruno Haible References: <5399074.FjVNtL66Cm@nimes> Content-Language: en-US From: Paul Eggert Organization: UCLA Computer Science Department In-Reply-To: <5399074.FjVNtL66Cm@nimes> X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 75606-done Cc: 75606-done@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) This is a multi-part message in MIME format. --------------TMBElAH5JauMJgXqtP6Zyo3A Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Thanks for reporting that. I installed the attached to fix it. --------------TMBElAH5JauMJgXqtP6Zyo3A Content-Type: text/x-patch; charset=UTF-8; name="0001-sort-fix-debug-buffer-overrun.patch" Content-Disposition: attachment; filename="0001-sort-fix-debug-buffer-overrun.patch" Content-Transfer-Encoding: base64 RnJvbSBlMDcxNjFkNGFmODlkYmY4MjMxMWNhMzk2YWMwOTE2YWE5MGI3MzAxIE1vbiBTZXAg MTcgMDA6MDA6MDAgMjAwMQpGcm9tOiBQYXVsIEVnZ2VydCA8ZWdnZXJ0QGNzLnVjbGEuZWR1 PgpEYXRlOiBUaHUsIDE2IEphbiAyMDI1IDA5OjIwOjQ1IC0wODAwClN1YmplY3Q6IFtQQVRD SF0gc29ydDogZml4IC0tZGVidWcgYnVmZmVyIG92ZXJydW4KCiogc3JjL3NvcnQuYyAoZGVi dWdfa2V5KTogRml4IHVuZGVmaW5lZCBiZWhhdmlvciB3aGVuIGEga2V5IGVuZHMKYmVmb3Jl IGl0IHN0YXJ0cy4gIFByb2JsZW0gcmVwb3J0ZWQgYnkgQnJ1bm8gSGFpYmxlCjxodHRwczov L2J1Z3MuZ251Lm9yZy83NTYwNj4uCi0tLQogc3JjL3NvcnQuYyB8IDYgKysrKystCiAxIGZp bGUgY2hhbmdlZCwgNSBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCgpkaWZmIC0tZ2l0 IGEvc3JjL3NvcnQuYyBiL3NyYy9zb3J0LmMKaW5kZXggOTk3NTY2MjQwLi4wOTI4ZmQ1N2Mg MTAwNjQ0Ci0tLSBhL3NyYy9zb3J0LmMKKysrIGIvc3JjL3NvcnQuYwpAQCAtMjM3Myw3ICsy MzczLDExIEBAIGRlYnVnX2tleSAoc3RydWN0IGxpbmUgY29uc3QgKmxpbmUsIHN0cnVjdCBr ZXlmaWVsZCBjb25zdCAqa2V5KQogICAgICAgaWYgKGtleS0+c3dvcmQgIT0gU0laRV9NQVgp CiAgICAgICAgIGJlZyA9IGJlZ2ZpZWxkIChsaW5lLCBrZXkpOwogICAgICAgaWYgKGtleS0+ ZXdvcmQgIT0gU0laRV9NQVgpCi0gICAgICAgIGxpbSA9IGxpbWZpZWxkIChsaW5lLCBrZXkp OworICAgICAgICB7CisgICAgICAgICAgbGltID0gbGltZmllbGQgKGxpbmUsIGtleSk7Cisg ICAgICAgICAgLyogVHJlYXQgZmllbGQgZW5kcyBiZWZvcmUgZmllbGQgc3RhcnRzIGFzIGVt cHR5IGZpZWxkcy4gICovCisgICAgICAgICAgbGltID0gTUFYIChiZWcsIGxpbSk7CisgICAg ICAgIH0KIAogICAgICAgaWYgKChrZXktPnNraXBzYmxhbmtzICYmIGtleS0+c3dvcmQgPT0g U0laRV9NQVgpCiAgICAgICAgICAgfHwga2V5LT5tb250aCB8fCBrZXlfbnVtZXJpYyAoa2V5 KSkKLS0gCjIuNDUuMgoK --------------TMBElAH5JauMJgXqtP6Zyo3A-- From debbugs-submit-bounces@debbugs.gnu.org Thu Jan 16 14:21:12 2025 Received: (at 75606-done) by debbugs.gnu.org; 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a=ed25519-sha256; c=relaxed/relaxed; t=1737055266; s=strato-dkim-0003; d=clisp.org; h=References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Cc:Date: From:Subject:Sender; bh=3La7CEeuK006ymk2AJG7lx4FiGmJqsIkSn8VyJi8yHY=; b=qpgsCpRO+mGd7F11mhxcUhYF0uPQTVet7S5dSJtlDv2vnAVsSBcbsznMUYRw5HH/o2 eWDdEZA6iU4PuMe6z0DA== X-RZG-AUTH: ":Ln4Re0+Ic/6oZXR1YgKryK8brlshOcZlLnY4jECd2hdUURIbZgL8PX2QiTuZ3cdB8X/nqm+ZFDrj427esj3ggT1Yh0+bzw7B" Received: from nimes.localnet by smtp.strato.de (RZmta 51.2.17 AUTH) with ESMTPSA id N6df4210GJL53L3 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Thu, 16 Jan 2025 20:21:05 +0100 (CET) From: Bruno Haible To: Paul Eggert Subject: Re: bug#75606: undefined behaviour in sort.c Date: Thu, 16 Jan 2025 20:21:05 +0100 Message-ID: <1996562.Hs2Xf39FnO@nimes> Organization: GNU In-Reply-To: References: <5399074.FjVNtL66Cm@nimes> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 75606-done Cc: 75606-done@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Paul Eggert wrote: > Thanks for reporting that. I installed the attached to fix it. Thanks. I confirm that it fixes it. Bruno From unknown Sat Jun 14 19:18:17 2025 Received: (at fakecontrol) by fakecontrolmessage; To: internal_control@debbugs.gnu.org From: Debbugs Internal Request Subject: Internal Control Message-Id: bug archived. Date: Fri, 14 Feb 2025 12:24:08 +0000 User-Agent: Fakemail v42.6.9 # This is a fake control message. # # The action: # bug archived. thanks # This fakemail brought to you by your local debbugs # administrator