From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE707C43387 for ; Mon, 7 Jan 2019 12:43:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ADCEB20665 for ; Mon, 7 Jan 2019 12:43:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1546864993; bh=/F81EFuYuIQnhjdODuPpZsP7wFKTh9oITLGamMdjWOk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=1ouWhswc3mzrQF34kfFYTTC4jZtqFu2I+bgiSCyVUv8zpaNuXoLyYuXTSQnG2umHv IX6T3/GRT9aFf5Q2Ic0k1XhACsHxCZS0So3kvYAA+jMW+hjlogLaNZT5Ot/z67sD1a m+u6C4BpmpBoItGl91c32LptqxjlzcbpqpceNoZk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728377AbfAGMnM (ORCPT ); Mon, 7 Jan 2019 07:43:12 -0500 Received: from mail.kernel.org ([198.145.29.99]:58982 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727813AbfAGMnL (ORCPT ); Mon, 7 Jan 2019 07:43:11 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EF5E020449; Mon, 7 Jan 2019 12:43:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1546864990; bh=/F81EFuYuIQnhjdODuPpZsP7wFKTh9oITLGamMdjWOk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S9Dg//9i/T+LlTk7AEzec3uX+V7RBw/OzcJ11Fy2qykUtpSzzHhJQeAosVtoPwtU/ yFDCSgec/kR2IUbv3K3Y4O7BsMMIlWtu2LNqIxTJwxO811c2Gs5ViK340Wfu+lvhaH +wop61g3vivAJP1BFMBY4Rt+bL8FpmOFxEslIIUw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sean Young , Mauro Carvalho Chehab Subject: [PATCH 4.20 112/145] media: rc: cec devices do not have a lirc chardev Date: Mon, 7 Jan 2019 13:32:29 +0100 Message-Id: <20190107104451.829283511@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190107104437.308206189@linuxfoundation.org> References: <20190107104437.308206189@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sean Young commit e5bb9d3d755f128956ed467ae50b41d22bb680c6 upstream. This fixes an oops in ir_lirc_scancode_event(). BUG: unable to handle kernel NULL pointer dereference at 0000000000000038 PGD 0 P4D 0 Oops: 0000 [#1] SMP PTI CPU: 9 PID: 27687 Comm: kworker/9:2 Tainted: P           OE 4.18.12-200.fc28.x86_64 #1 Hardware name: Supermicro C7X99-OCE-F/C7X99-OCE-F, BIOS 2.1a 06/15/2018 Workqueue: events pulse8_irq_work_handler [pulse8_cec] RIP: 0010:ir_lirc_scancode_event+0x3d/0xb0 [rc_core] Code: 8d ae b4 07 00 00 49 81 c6 b8 07 00 00 53 e8 4a df c3 d5 48 89 ef 49 89 45 00 e8 4e 84 41 d6 49 8b 1e 49 89 c4 4c 39 f3 74 58 <8b> 43 38 8b 53 40 89 c1 2b 4b 3c 39 ca 72 41 21 d0 49 8b 7d 00 49 RSP: 0018:ffffaa10e3c07d58 EFLAGS: 00010017 RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000018 RDX: 0000000000000001 RSI: 00316245397fa93c RDI: ffff966d31c8d7b4 RBP: ffff966d31c8d7b4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: ffffaa10e3c07e28 R12: 0000000000000002 R13: ffffaa10e3c07d88 R14: ffff966d31c8d7b8 R15: 0000000000000073 FS:  0000000000000000(0000) GS:ffff966d3f440000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000038 CR3: 00000009d820a003 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace:  ir_do_keydown+0x75/0x260 [rc_core]  rc_keydown+0x54/0xc0 [rc_core]  cec_received_msg_ts+0xaa8/0xaf0 [cec]  process_one_work+0x1a1/0x350  worker_thread+0x30/0x380  ? pwq_unbound_release_workfn+0xd0/0xd0  kthread+0x112/0x130  ? kthread_create_worker_on_cpu+0x70/0x70  ret_from_fork+0x35/0x40 Modules linked in: rc_tt_1500 dvb_usb_dvbsky dvb_usb_v2 uas usb_storage fuse vhost_net vhost tap xt_CHECKSUM iptable_mangle ip6t_REJECT nf_reject_ipv6 tun 8021q garp mrp xt_nat macvlan xfs devlink ebta  si2157 si2168 cx25840 cx23885 kvm altera_ci tda18271 joydev ir_rc6_decoder rc_rc6_mce crct10dif_pclmul crc32_pclmul ghash_clmulni_intel intel_cstate intel_uncore altera_stapl m88ds3103 tveeprom cx2341  mxm_wmi igb crc32c_intel megaraid_sas dca i2c_algo_bit wmi vfio_pci irqbypass vfio_virqfd vfio_iommu_type1 vfio i2c_dev CR2: 0000000000000038 Cc: # v4.16+ Signed-off-by: Sean Young Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/rc/rc-main.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/drivers/media/rc/rc-main.c +++ b/drivers/media/rc/rc-main.c @@ -695,7 +695,8 @@ void rc_repeat(struct rc_dev *dev) (dev->last_toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0) }; - ir_lirc_scancode_event(dev, &sc); + if (dev->allowed_protocols != RC_PROTO_BIT_CEC) + ir_lirc_scancode_event(dev, &sc); spin_lock_irqsave(&dev->keylock, flags); @@ -735,7 +736,8 @@ static void ir_do_keydown(struct rc_dev .keycode = keycode }; - ir_lirc_scancode_event(dev, &sc); + if (dev->allowed_protocols != RC_PROTO_BIT_CEC) + ir_lirc_scancode_event(dev, &sc); if (new_event && dev->keypressed) ir_do_keyup(dev, false);