From patchwork Thu Aug 20 09:18:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 265254 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=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,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 D6531C433DF for ; Thu, 20 Aug 2020 13:54:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AD9622067C for ; Thu, 20 Aug 2020 13:54:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597931659; bh=kyZ4OQTGL/UNsZkgR+TRXjK66fbqkC2ATajEKr+L0Y8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=hjqGKoLzrYn7KKCpPo2ZAbYM6WPEvAezmCeS/beT6zHzBAOPawo57MRuup3TTRauQ LBseti4NxSQMtI8Lc5rUB61EaM3LNCQ+Lo5QiG/0bNzp0uyaGMreFG6ykvmj5v6YFb NB88zmwwBqUXbYCSFsUfoopcFwOPTKHx36qlwYeI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731004AbgHTNyI (ORCPT ); Thu, 20 Aug 2020 09:54:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:33620 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727797AbgHTJ0D (ORCPT ); Thu, 20 Aug 2020 05:26:03 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.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 3E7DD22D2B; Thu, 20 Aug 2020 09:25:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597915558; bh=kyZ4OQTGL/UNsZkgR+TRXjK66fbqkC2ATajEKr+L0Y8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bqaDWSvhzAWSzh942EFJzveyD7eJGsIHhpzCBDJWTa/ycein+OzyPJOlDiN+t3D+7 8rG5U08Z/AL61zvk/J9+m5uTyskHo8DAG5dCKDA8yPe5MgoFDXpD/uPNVZPD+rwjVo nZsK+UnuuPB573rntmRvDHqvs2q30/qaKk0D/NUc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Eugeniu Rosca , Kieran Bingham , Laurent Pinchart , Hans Verkuil , Mauro Carvalho Chehab Subject: [PATCH 5.8 056/232] media: vsp1: dl: Fix NULL pointer dereference on unbind Date: Thu, 20 Aug 2020 11:18:27 +0200 Message-Id: <20200820091615.499502494@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200820091612.692383444@linuxfoundation.org> References: <20200820091612.692383444@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Eugeniu Rosca commit c92d30e4b78dc331909f8c6056c2792aa14e2166 upstream. In commit f3b98e3c4d2e16 ("media: vsp1: Provide support for extended command pools"), the vsp pointer used for referencing the VSP1 device structure from a command pool during vsp1_dl_ext_cmd_pool_destroy() was not populated. Correctly assign the pointer to prevent the following null-pointer-dereference when removing the device: [*] h3ulcb-kf #> echo fea28000.vsp > /sys/bus/platform/devices/fea28000.vsp/driver/unbind Unable to handle kernel NULL pointer dereference at virtual address 0000000000000028 Mem abort info: ESR = 0x96000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=00000007318be000 [0000000000000028] pgd=00000007333a1003, pud=00000007333a6003, pmd=0000000000000000 Internal error: Oops: 96000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 486 Comm: sh Not tainted 5.7.0-rc6-arm64-renesas-00118-ge644645abf47 #185 Hardware name: Renesas H3ULCB Kingfisher board based on r8a77951 (DT) pstate: 40000005 (nZcv daif -PAN -UAO) pc : vsp1_dlm_destroy+0xe4/0x11c lr : vsp1_dlm_destroy+0xc8/0x11c sp : ffff800012963b60 x29: ffff800012963b60 x28: ffff0006f83fc440 x27: 0000000000000000 x26: ffff0006f5e13e80 x25: ffff0006f5e13ed0 x24: ffff0006f5e13ed0 x23: ffff0006f5e13ed0 x22: dead000000000122 x21: ffff0006f5e3a080 x20: ffff0006f5df2938 x19: ffff0006f5df2980 x18: 0000000000000003 x17: 0000000000000000 x16: 0000000000000016 x15: 0000000000000003 x14: 00000000000393c0 x13: ffff800011a5ec18 x12: ffff800011d8d000 x11: ffff0006f83fcc68 x10: ffff800011a53d70 x9 : ffff8000111f3000 x8 : 0000000000000000 x7 : 0000000000210d00 x6 : 0000000000000000 x5 : ffff800010872e60 x4 : 0000000000000004 x3 : 0000000078068000 x2 : ffff800012781000 x1 : 0000000000002c00 x0 : 0000000000000000 Call trace: vsp1_dlm_destroy+0xe4/0x11c vsp1_wpf_destroy+0x10/0x20 vsp1_entity_destroy+0x24/0x4c vsp1_destroy_entities+0x54/0x130 vsp1_remove+0x1c/0x40 platform_drv_remove+0x28/0x50 __device_release_driver+0x178/0x220 device_driver_detach+0x44/0xc0 unbind_store+0xe0/0x104 drv_attr_store+0x20/0x30 sysfs_kf_write+0x48/0x70 kernfs_fop_write+0x148/0x230 __vfs_write+0x18/0x40 vfs_write+0xdc/0x1c4 ksys_write+0x68/0xf0 __arm64_sys_write+0x18/0x20 el0_svc_common.constprop.0+0x70/0x170 do_el0_svc+0x20/0x80 el0_sync_handler+0x134/0x1b0 el0_sync+0x140/0x180 Code: b40000c2 f9403a60 d2800084 a9400663 (f9401400) ---[ end trace 3875369841fb288a ]--- Fixes: f3b98e3c4d2e16 ("media: vsp1: Provide support for extended command pools") Cc: stable@vger.kernel.org # v4.19+ Signed-off-by: Eugeniu Rosca Reviewed-by: Kieran Bingham Tested-by: Kieran Bingham Reviewed-by: Laurent Pinchart Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/platform/vsp1/vsp1_dl.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/media/platform/vsp1/vsp1_dl.c +++ b/drivers/media/platform/vsp1/vsp1_dl.c @@ -431,6 +431,8 @@ vsp1_dl_cmd_pool_create(struct vsp1_devi if (!pool) return NULL; + pool->vsp1 = vsp1; + spin_lock_init(&pool->lock); INIT_LIST_HEAD(&pool->free);