From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754062AbdKMRYN (ORCPT ); Mon, 13 Nov 2017 12:24:13 -0500 Received: from mailout3.samsung.com ([203.254.224.33]:52790 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753988AbdKMRYL (ORCPT ); Mon, 13 Nov 2017 12:24:11 -0500 DKIM-Filter: OpenDKIM Filter v2.11.0 mailout3.samsung.com 20171113172410epoutp033f26d5aaf3eaa08940524315a656777c~2tRprfUMY0921009210epoutp03G X-AuditID: b6c32a47-cd7ff7000000102c-c4-5a09d53983a5 From: Bartlomiej Zolnierkiewicz To: Tony Lindgren Cc: Kees Cook , Tomi Valkeinen , Daniel Vetter , Stephen Rothwell , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: Re: Regression in Linux next-20171113 with fbdev timer conversion Date: Mon, 13 Nov 2017 18:24:06 +0100 Message-id: <7461733.ys6AjPzxL6@amdc3058> User-Agent: KMail/4.13.3 (Linux/3.13.0-96-generic; KDE/4.13.3; x86_64; ; ) In-reply-to: <20171113170714.GV28152@atomide.com> MIME-version: 1.0 Content-transfer-encoding: 7Bit Content-type: text/plain; charset="us-ascii" X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpmleLIzCtJLcpLzFFi42LZdljTXNfyKmeUwY+NbBYLH95ltrjy9T2b xZnuXIvLu+awWWzde5XdYv38W2wW+694ObB7fPs6icWj8cYNNo/ZDRdZPPZ+W8Dicb/7OJPH 8RvbmTw+b5ILYI/isklJzcksSy3St0vgylj6Zj5LwXrZirbpVxgbGOdJdDFyckgImEh8b//I 3MXIxSEksINR4sP7NhYI5zujxOGla1hhqvbeaWaHSOxmlNg9ZwsLSEJI4CujxJYPsiA2m4CV xMT2VYxdjBwcIgIqEndf2oPUMws8ZpS49uw6E0iNsICXxPVlE8B6WQRUJabOuQcW5xXQlDgy YQ9YXBSoZsu+drA4p4ChxPwXU5khagQlfky+B1bDLCAvsW//VFYIW0fi7LF1jCDLJATOsElc 3XOLHeJqF4nn3aeYIGxhiVfHt0DFpSWerdrICGFPZ5TY/lsConkzo8Sq3ROgiqwlDh+/CLWB T6Lj8F92kM8kBHglOtqEIEwPiaOHEiCqHSWu3n8PDcYWRokFT98xT2CUnYXk7llI7p6F5O4F jMyrGMVSC4pz01OLjQqM9YoTc4tL89L1kvNzNzGCk4aW+w7Gbed8DjEKcDAq8fC+uMgZJcSa WFZcmXuIUYKDWUmE99M6oBBvSmJlVWpRfnxRaU5q8SFGaQ4WJXHeum3XIoQE0hNLUrNTUwtS i2CyTBycUg2Mvem3d6o2ySecPTSPZ7vVolP3pm521JnK+uJsdZN4XsOqCBd+NusDSVvOfHyq UPRsTgLLa7GHTvnJQcHd9c6z+qQi47iao2e0STyQneR38+qpZSoTvv22Upo/vfHjnrMeqkcm Xly2Y8HEk6EbJ69d/PTGVw35XV0JX9bbZ+05v+luxqT1zpHqpkosxRmJhlrMRcWJAKbM258W AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrLLMWRmVeSWpSXmKPExsVy+t9jAV2Lq5xRBqt7uS0WPrzLbHHl63s2 izPduRaXd81hs9i69yq7xfr5t9gs9l/xcmD3+PZ1EotH440bbB6zGy6yeOz9toDF4373cSaP 4ze2M3l83iQXwB7FZZOSmpNZllqkb5fAlbH0zXyWgvWyFW3TrzA2MM6T6GLk5JAQMJHYe6eZ vYuRi0NIYCejxJqZPYwQzldGiRtLv7KCVLEJWElMbF8FlODgEBFQkbj70h6khlngMaNEx7n1 jCA1wgJeEteXTWABsVkEVCWmzrnHBGLzCmhKHJmwBywuClSzZV87WJxTwFBi/oupzBDL2hgl rj3/zAbRICjxY/I9sAZmAXmJffunskLYWhLrdx5nmsDIPwtJ2SwkZbOQlC1gZF7FKJlaUJyb nltsVGCUl1quV5yYW1yal66XnJ+7iREY6NsOa/XvYHy8JP4QowAHoxIPr8MVzigh1sSy4src Q4wSHMxKIryf1gGFeFMSK6tSi/Lji0pzUosPMUpzsCiJ8/LnH4sUEkhPLEnNTk0tSC2CyTJx cEo1MK4/7a77yOjzr1XV+x+z1r6Y6Xr3xZv1Sl9/qPfWSb4Tm1xavcKU55vDzePfdj3bt3L7 pt1CZzpMz75WNhQ9eWKB2aIIadUJ53R+Tdc71Xl2wUSr94/vLEgUcWh9oFeeueqL5o3lJlv1 BJjqkrkbtyun/52weI44a5uSx42Jpinb7Z4IcDOql09SYinOSDTUYi4qTgQAC3GtBHACAAA= X-CMS-MailID: 20171113172408epcas2p34f96a651adf165f74a754acd28dd6ce4 X-Msg-Generator: CA CMS-TYPE: 102P X-CMS-RootMailID: 20171113170720epcas2p3737aa011465d2d56d10cef18dcefed7a X-RootMTR: 20171113170720epcas2p3737aa011465d2d56d10cef18dcefed7a References: <20171113170714.GV28152@atomide.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Monday, November 13, 2017 09:07:14 AM Tony Lindgren wrote: > Hi, Hi Tony, > Looks like next-20171113 now has a NULL pointe dereference with commit > 6c78935777d1 ("video: fbdev: Convert timers to use timer_setup()"). > > See the error below, any ideas? Should be fixed by: https://marc.info/?l=linux-fbdev&m=151056635200583&w=2 > Regards, > > Tony > > 8< ------------------ > Unable to handle kernel NULL pointer dereference at virtual address 00000214 > pgd = edfe4000 > [00000214] *pgd=00000000 > Internal error: Oops: 5 [#1] SMP ARM > ... > CPU: 1 PID: 920 Comm: openrc-run.sh Not tainted 4.14.0-next-20171113+ #1911 > Hardware name: Generic OMAP4 (Flattened Device Tree) > task: ed922000 task.stack: edc20000 > PC is at _test_and_set_bit+0x20/0x48 > LR is at queue_work_on+0x28/0x74 > pc : [] lr : [] psr: 60000193 > sp : edc21e38 ip : 00000000 fp : c0d09168 > r10: edb686bc r9 : 00000001 r8 : c0544e4c > r7 : ee80f000 r6 : 00000002 r5 : 00000214 r4 : 20000113 > r3 : 00000001 r2 : 00000001 r1 : 00000214 r0 : 00000000 > Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none > Control: 10c5387d Table: adfe404a DAC: 00000051 > Process openrc-run.sh (pid: 920, stack limit = 0xedc20218) > Stack: (0xedc21e38 to 0xedc22000) > 1e20: edb686bc edb686bc > 1e40: c0dc8588 00000100 c0544e4c c0544e6c c0dc7239 c01cc78c 00000001 00000000 > 1e60: c01cc6d0 00000000 00000000 00000000 00000001 c1505b74 c124c5f8 00000000 > 1e80: c0adfb54 00000000 c0544e4c edb686bc c0544e4c ef6b3700 edc20000 edc21ed8 > 1ea0: c0dc8588 c0d09168 edb686bc c01ccbbc ffff8fee 00000001 edc21ed8 c0d05d00 > 1ec0: ef6b3700 c0d0957c 00000100 c0dc8128 00000282 c01ccd94 00000000 c0d4675c > 1ee0: 60000113 c0dc7132 c0d09168 c019f718 ffffe000 ffffffff c0d03084 edc20000 > 1f00: 00000001 c0dc7132 c0d09168 c0101714 c0d8821c c0dc720a 00000002 0000000a > 1f20: ffff8fee 00400000 00000001 00000002 00000000 ffffe000 00000000 c0d0957c > 1f40: 00000000 00000001 ee80d400 fa240100 c0d09854 c013fa6c c0c79160 c01adf54 > 1f60: fa24010c 000003eb 000003ff 00000000 edc21fb0 c0d88738 fa240100 c0101574 > 1f80: 00000006 fa241100 edc20000 b6f2e9bc 20000010 ffffffff 10c5387d 10c5387d > 1fa0: 005169a0 00517240 005169a0 c088d6b4 005280ea 005280eb 00000000 0000005f > 1fc0: 005280e4 004f9511 00517830 00000000 00000000 005169a0 00517240 005169a0 > 1fe0: 00000001 bed595c0 bed595e0 b6f2e9bc 20000010 ffffffff 00000000 00000000 > [] (_test_and_set_bit) from [] (queue_work_on+0x28/0x74) > [] (queue_work_on) from [] (cursor_timer_handler+0x20/0x44) > [] (cursor_timer_handler) from [] (call_timer_fn+0xbc/0x408) > [] (call_timer_fn) from [] (expire_timers+0xe4/0x220) > [] (expire_timers) from [] (run_timer_softirq+0x9c/0x1a4) > [] (run_timer_softirq) from [] (__do_softirq+0x13c/0x5b8) > [] (__do_softirq) from [] (irq_exit+0x14c/0x1a8) > [] (irq_exit) from [] (__handle_domain_irq+0x6c/0xe0) > [] (__handle_domain_irq) from [] (gic_handle_irq+0x58/0xb8) > [] (gic_handle_irq) from [] (__irq_usr+0x54/0x80) > Exception stack(0xedc21fb0 to 0xedc21ff8) > 1fa0: 005280ea 005280eb 00000000 0000005f > 1fc0: 005280e4 004f9511 00517830 00000000 00000000 005169a0 00517240 005169a0 > 1fe0: 00000001 bed595c0 bed595e0 b6f2e9bc 20000010 ffffffff > Code: e1a002a0 e0811100 e1a03312 ee070fba (e1912f9f) Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics