From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-1493289-1520633547-2-9349106422532186487 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='198.145.29.99', Host='mail.kernel.org', Country='US', FromHeader='cz', MailFrom='org' X-Spam-charsets: to='utf-8', plain='us-ascii' X-Attached: signature.asc X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: SRS0=Tvze=F7=ucw.cz=pavel@kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1520633547; b=BCywJmqCdeIhJ66VSOqOLSMSi2v0FcOCtj85xF1PhEcSvUJ /yLnFsyar9V1dytjeYNPi055+YEeAY0fAPPLjpAd6yOOgBVOGVkHUPDscdnKY8EE ZMyfCQJGT1OvY+4teH6UOChWbntYmzlFxOlUCVw+L7XKFA7wb1zSJABg1ZGyMMMt hVHB/k/tpXuSXfq2Ev5UjU4lV0wWzy3SCg13liGPfecflOerZ0fHXFV2Azw8Lbtx 9VC68HoG6UETLAtTXYbQXuSUI9VLI6g0XiI60bu/i85E8xlwPskbCZm2Jc2Ojph2 Ela6D3V0H9MgQbTHDB6RxHNABI+yTIkCveJS0/A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=date:from:to:subject:message-id :mime-version:content-type; s=arctest; t=1520633547; bh=xIvLBCq2 OPRaLeb8smLeFEStPBIzuvZwl3DGBbNsnv4=; b=MjpZmFKXzDc2xBRoWZoPoE5Y PHiRMkX6cgqewAqHiG5OC9GiAc2/iKOpx/zxbihalhhbmxV8fCJm0y/03DSAPOms d/1nIqFz4VuBUtVNHWtyw8VA4qhBswia+Lr1zpMTIGkwVArErd+LTZZxIZtAZNrN oULJQckG7nUT7J6cW/mBPidDoyfLBLDeQMqWb2QfOCMxLyh2wKh0hd2ZG5MGb/UJ za+79bVNyHZmrLp0ZyzE7rAXI92QlApnrM3O3gJK0ey5DZYCMUBBF+iqi/TkdUNU pyDOGLXKQoTKjq1kmuG5I8zjugbV4AWlTpl5XVz147l506mYnsP4scz1gCyYOw== ARC-Authentication-Results: i=1; mx2.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,d=none) header.from=ucw.cz; iprev=pass policy.iprev=198.145.29.99 (mail.kernel.org); spf=none smtp.mailfrom=SRS0=Tvze=F7=ucw.cz=pavel@kernel.org smtp.helo=mail.kernel.org; x-aligned-from=fail; x-category=clean score=49 state=0; x-ptr=pass x-ptr-helo=mail.kernel.org x-ptr-lookup=mail.kernel.org; x-return-mx=pass smtp.domain=kernel.org smtp.result=pass smtp_is_org_domain=yes header.domain=ucw.cz header.result=pass header_is_org_domain=yes; x-tls=pass version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128 Authentication-Results: mx2.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,d=none) header.from=ucw.cz; iprev=pass policy.iprev=198.145.29.99 (mail.kernel.org); spf=none smtp.mailfrom=SRS0=Tvze=F7=ucw.cz=pavel@kernel.org smtp.helo=mail.kernel.org; x-aligned-from=fail; x-category=clean score=49 state=0; x-ptr=pass x-ptr-helo=mail.kernel.org x-ptr-lookup=mail.kernel.org; x-return-mx=pass smtp.domain=kernel.org smtp.result=pass smtp_is_org_domain=yes header.domain=ucw.cz header.result=pass header_is_org_domain=yes; x-tls=pass version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128 X-Remote-Delivered-To: security@kernel.org DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2047421771 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ucw.cz Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=pavel@ucw.cz Date: Fri, 9 Mar 2018 23:12:21 +0100 From: Pavel Machek To: pali.rohar@gmail.com, sre@kernel.org, kernel list , linux-arm-kernel , linux-omap@vger.kernel.org, tony@atomide.com, khilman@kernel.org, aaro.koskinen@iki.fi, ivo.g.dimitrov.75@gmail.com, patrikbachan@gmail.com, serge@hallyn.com, abcloriens@gmail.com, clayton@craftyguy.net, martijn@brixit.nl, sakari.ailus@linux.intel.com, Filip =?utf-8?Q?Matijevi=C4=87?= , security@kernel.org, jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, linux-iio@vger.kernel.org Subject: Nokia N900: v4.16-rc4: oops in iio when grepping sysfs Message-ID: <20180309221220.GA15272@amd> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="1yeeQ81UyVL57Vl7" Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: --1yeeQ81UyVL57Vl7 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! Hmm. Looks like there's a lot of fun to be had with sysfs. Pavel pavel@n900:~$ uname -a Linux n900 4.16.0-rc4-59690-g7f84626-dirty #543 Thu Mar 8 19:53:30 CET 2018 armv7l GNU/Linux [ 306.402496] bq2415x: command Timer reset [ 312.761322] adp1653 2-0030: Read Addr:03 Val:00 ok [ 313.264129] Unable to handle kernel NULL pointer dereference at virtual address 00000 000 [ 313.272308] pgd =3D 01336620 [ 313.275146] [00000000] *pgd=3D800af831, *pte=3D00000000, *ppte=3D00000000 [ 313.281463] Internal error: Oops: 80000007 [#1] ARM [ 313.286376] Modules linked in: [ 313.289459] CPU: 0 PID: 3584 Comm: grep Tainted: G W 4.16.0-rc4-59690-g 7f84626-dirty #543 [ 313.298919] Hardware name: Nokia RX-51 board [ 313.303222] PC is at (null) [ 313.306213] LR is at iio_ev_state_show+0x38/0x54 [ 313.310852] pc : [<00000000>] lr : [] psr: a0000013 [ 313.317169] sp : c7b47e70 ip : c087bb24 fp : 00000001 [ 313.322418] r10: cb19e000 r9 : c0857220 r8 : 00001000 [ 313.327667] r7 : 00000fff r6 : cb711c80 r5 : cb19e000 r4 : 00000000 [ 313.334228] r3 : 00000001 r2 : 00000000 r1 : c087b4dc r0 : ce584800 [ 313.340789] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 313.347991] Control: 10c5387d Table: 87bec019 DAC: 00000051 [ 313.353759] Process grep (pid: 3584, stack limit =3D 0xc4e45eab) [ 313.359619] Stack: (0xc7b47e70 to 0xc7b48000) [ 313.364013] 7e60: c05d6988 cb711b00 ce585c00 c0450d68 [ 313.471038] [] (iio_ev_state_show) from [] (dev_attr_show+0x1c/0x4c) [ 313.479187] [] (dev_attr_show) from [] (sysfs_kf_seq_show+0x90/0x108) [ 313.487426] [] (sysfs_kf_seq_show) from [] (kernfs_seq_show+0x24/0x28) [ 313.495758] [] (kernfs_seq_show) from [] (seq_read+0x1dc/0x500) [ 313.503479] [] (seq_read) from [] (__vfs_read+0x2c/0x120) [ 313.510681] [] (__vfs_read) from [] (vfs_read+0x88/0x114) [ 313.517852] [] (vfs_read) from [] (SyS_read+0x40/0x8c) [ 313.524780] [] (SyS_read) from [] (ret_fast_syscall+0x0/0x54) [ 313.532318] Exception stack(0xc7b47fa8 to 0xc7b47ff0) [ 313.537414] 7fa0: 00035330 00042000 00000003 00042000 00008000 00008000 --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --1yeeQ81UyVL57Vl7 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlqjBsQACgkQMOfwapXb+vKPawCeLfAhJytBgevyhfgmPNyTsian 8B8Anj3pRQ/gHj/CDq0yO2i7sLuJsZbx =X+br -----END PGP SIGNATURE----- --1yeeQ81UyVL57Vl7--