From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754346AbeAOMDm (ORCPT + 1 other); Mon, 15 Jan 2018 07:03:42 -0500 Received: from mx3.molgen.mpg.de ([141.14.17.11]:54900 "EHLO mx1.molgen.mpg.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752403AbeAOMDk (ORCPT ); Mon, 15 Jan 2018 07:03:40 -0500 Subject: Re: UBSAN: Undefined behaviour in drivers/acpi/sysfs.c:849:33 To: "Rafael J. Wysocki" , Len Brown Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, it+linux-acpi@molgen.mpg.de References: <71ef5c07-bd27-0569-cc23-33e19f91c154@molgen.mpg.de> From: Paul Menzel Message-ID: Date: Mon, 15 Jan 2018 13:03:37 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 MIME-Version: 1.0 In-Reply-To: <71ef5c07-bd27-0569-cc23-33e19f91c154@molgen.mpg.de> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms010407030404090109090605" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: This is a cryptographically signed message in MIME format. --------------ms010407030404090109090605 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable Dear Linux folks, On 12/13/17 14:13, Paul Menzel wrote: > I enabled the undefined behavior sanitizer, and built Linus=E2=80=99 ma= ster=20 > branch under Ubuntu 17.10 with gcc (Ubuntu 7.2.0-8ubuntu3) 7.2.0. >=20 > ``` > $ grep UBSAN /boot/config-4.15.0-rc3+ > CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=3Dy > # CONFIG_ARCH_WANTS_UBSAN_NO_NULL is not set > CONFIG_UBSAN=3Dy > CONFIG_UBSAN_SANITIZE_ALL=3Dy > # CONFIG_UBSAN_ALIGNMENT is not set > CONFIG_UBSAN_NULL=3Dy > ``` >=20 > Starting the system the messages below are printed. >=20 > ``` > [=C2=A0=C2=A0=C2=A0 0.758899]=20 > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=20 >=20 > [=C2=A0=C2=A0=C2=A0 0.758960] UBSAN: Undefined behaviour in drivers/acp= i/sysfs.c:849:33 > [=C2=A0=C2=A0=C2=A0 0.759008] shift exponent 64 is too large for 64-bit= type 'long long unsigned int' > [=C2=A0=C2=A0=C2=A0 0.759064] CPU: 2 PID: 1 Comm: swapper/0 Not tainted= 4.15.0-rc3+ #12 > [=C2=A0=C2=A0=C2=A0 0.759076] Hardware name: Notebook N24_25BU/N24_25BU= , BIOS 5.12 07/07/2017 > [=C2=A0=C2=A0=C2=A0 0.759088] Call Trace: > [=C2=A0=C2=A0=C2=A0 0.759118]=C2=A0 ? ftrace_graph_caller+0x98/0x98 > [=C2=A0=C2=A0=C2=A0 0.759133]=C2=A0 dump_stack+0x70/0xae > [=C2=A0=C2=A0=C2=A0 0.759167]=C2=A0 ubsan_epilogue+0x9/0x40 > [=C2=A0=C2=A0=C2=A0 0.759188]=C2=A0 __ubsan_handle_shift_out_of_bounds+= 0x12b/0x170 > [=C2=A0=C2=A0=C2=A0 0.759214]=C2=A0 ? ftrace_graph_caller+0x68/0x98 > [=C2=A0=C2=A0=C2=A0 0.759293]=C2=A0 ? acpi_gpe_apply_masked_gpes+0x50/0= xa9 > [=C2=A0=C2=A0=C2=A0 0.759314]=C2=A0 acpi_gpe_apply_masked_gpes+0x50/0xa= 9 > [=C2=A0=C2=A0=C2=A0 0.759348]=C2=A0 ? ftrace_graph_caller+0x98/0x98 > [=C2=A0=C2=A0=C2=A0 0.759363]=C2=A0 acpi_scan_init+0x145/0x2e4 > [=C2=A0=C2=A0=C2=A0 0.759385]=C2=A0 ? acpi_sleep_proc_init+0x24/0x24 > [=C2=A0=C2=A0=C2=A0 0.759413]=C2=A0 ? acpi_sleep_proc_init+0x24/0x24 > [=C2=A0=C2=A0=C2=A0 0.759429]=C2=A0 ? ftrace_graph_caller+0x98/0x98 > [=C2=A0=C2=A0=C2=A0 0.759444]=C2=A0 acpi_init+0x340/0x3a0 > [=C2=A0=C2=A0=C2=A0 0.759500]=C2=A0 ? ftrace_graph_caller+0x98/0x98 > [=C2=A0=C2=A0=C2=A0 0.759515]=C2=A0 do_one_initcall+0x173/0x200 > [=C2=A0=C2=A0=C2=A0 0.759553]=C2=A0 ? acpi_sleep_proc_init+0x24/0x24 > [=C2=A0=C2=A0=C2=A0 0.759573]=C2=A0 ? do_one_initcall+0x5/0x200 > [=C2=A0=C2=A0=C2=A0 0.759612]=C2=A0 ? ftrace_graph_caller+0x98/0x98 > [=C2=A0=C2=A0=C2=A0 0.759628]=C2=A0 kernel_init_freeable+0x305/0x395 > [=C2=A0=C2=A0=C2=A0 0.759653]=C2=A0 ? rest_init+0xd0/0xd0 > [=C2=A0=C2=A0=C2=A0 0.759689]=C2=A0 kernel_init+0xb/0x119 > [=C2=A0=C2=A0=C2=A0 0.759705]=C2=A0 ? rest_init+0xd0/0xd0 > [=C2=A0=C2=A0=C2=A0 0.759721]=C2=A0 ret_from_fork+0x1f/0x30 > [=C2=A0=C2=A0=C2=A0 0.759815]=20 > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=20 >=20 > ``` >=20 > Please tell me, if you need anything else to address this. I created bug #198481 [1], so this is not forgotten about. Kind regards, Paul [1] https://bugzilla.kernel.org/show_bug.cgi?id=3D198481 --------------ms010407030404090109090605 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCC EFowggUSMIID+qADAgECAgkA4wvV+K8l2YEwDQYJKoZIhvcNAQELBQAwgYIxCzAJBgNVBAYT AkRFMSswKQYDVQQKDCJULVN5c3RlbXMgRW50ZXJwcmlzZSBTZXJ2aWNlcyBHbWJIMR8wHQYD VQQLDBZULVN5c3RlbXMgVHJ1c3QgQ2VudGVyMSUwIwYDVQQDDBxULVRlbGVTZWMgR2xvYmFs Um9vdCBDbGFzcyAyMB4XDTE2MDIyMjEzMzgyMloXDTMxMDIyMjIzNTk1OVowgZUxCzAJBgNV BAYTAkRFMUUwQwYDVQQKEzxWZXJlaW4genVyIEZvZXJkZXJ1bmcgZWluZXMgRGV1dHNjaGVu IEZvcnNjaHVuZ3NuZXR6ZXMgZS4gVi4xEDAOBgNVBAsTB0RGTi1QS0kxLTArBgNVBAMTJERG Ti1WZXJlaW4gQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkgMjCCASIwDQYJKoZIhvcNAQEBBQAD ggEPADCCAQoCggEBAMtg1/9moUHN0vqHl4pzq5lN6mc5WqFggEcVToyVsuXPztNXS43O+FZs 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