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=-20.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 C95CCC11F70 for ; Sun, 4 Jul 2021 23:13:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B20C161375 for ; Sun, 4 Jul 2021 23:13:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232884AbhGDXPt (ORCPT ); Sun, 4 Jul 2021 19:15:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:50600 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234392AbhGDXPG (ORCPT ); Sun, 4 Jul 2021 19:15:06 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6FB7461452; Sun, 4 Jul 2021 23:12:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625440349; bh=Q25BYiiSCoZKDqHfS0tDwl2kMXeirGVjKY4WUW/NYOA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R7p7AJb94nDekJwNhyLz8vlqXS9c3GHsT7vBDfxzvVfldDnmREP4gi1JnmD0d2YEw +UYanQIfbzLTUaehwkEk/QooyrSJBGBqagvF+JecFhMbb2mfIFytOFLRrD1QAPGKD3 qVUEgj/65gOmPgKs86DtG3DF2hm4fP+2xgA+t4qFlTUno8khRRy6YgHZobpJKOcGq6 IgG8ydpjiGJ9QkNBzYZf/O1H+vWs9YKxqFB8RQjO9n5ozuxfIUfqUsp7Ic65KrlvHk xXFOqXrPm+8mp0me1F7yPoVAQSpPbSpmSM6glyK7bfGiD6IA4i/uOZoFyzcExgy5gD zFVa7k/fZHduQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Anirudh Rayabharam , syzbot+e74a998ca8f1df9cc332@syzkaller.appspotmail.com, Greg Kroah-Hartman , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 05/15] media: pvrusb2: fix warning in pvr2_i2c_core_done Date: Sun, 4 Jul 2021 19:12:11 -0400 Message-Id: <20210704231222.1492037-5-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210704231222.1492037-1-sashal@kernel.org> References: <20210704231222.1492037-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Anirudh Rayabharam [ Upstream commit f8194e5e63fdcb349e8da9eef9e574d5b1d687cb ] syzbot has reported the following warning in pvr2_i2c_done: sysfs group 'power' not found for kobject '1-0043' When the device is disconnected (pvr_hdw_disconnect), the i2c adapter is not unregistered along with the USB and v4l2 teardown. As part of the USB device disconnect, the sysfs files of the subdevices are also deleted. So, by the time pvr_i2c_core_done is called by pvr_context_destroy, the sysfs files have been deleted. To fix this, unregister the i2c adapter too in pvr_hdw_disconnect. Make the device deregistration code shared by calling pvr_hdw_disconnect from pvr2_hdw_destroy. Reported-by: syzbot+e74a998ca8f1df9cc332@syzkaller.appspotmail.com Tested-by: syzbot+e74a998ca8f1df9cc332@syzkaller.appspotmail.com Reviewed-by: Greg Kroah-Hartman Signed-off-by: Anirudh Rayabharam Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/usb/pvrusb2/pvrusb2-hdw.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c index 232b0fd3e478..ba3b0141538d 100644 --- a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c +++ b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c @@ -2731,9 +2731,8 @@ void pvr2_hdw_destroy(struct pvr2_hdw *hdw) pvr2_stream_destroy(hdw->vid_stream); hdw->vid_stream = NULL; } - pvr2_i2c_core_done(hdw); v4l2_device_unregister(&hdw->v4l2_dev); - pvr2_hdw_remove_usb_stuff(hdw); + pvr2_hdw_disconnect(hdw); mutex_lock(&pvr2_unit_mtx); do { if ((hdw->unit_number >= 0) && @@ -2760,6 +2759,7 @@ void pvr2_hdw_disconnect(struct pvr2_hdw *hdw) { pvr2_trace(PVR2_TRACE_INIT,"pvr2_hdw_disconnect(hdw=%p)",hdw); LOCK_TAKE(hdw->big_lock); + pvr2_i2c_core_done(hdw); LOCK_TAKE(hdw->ctl_lock); pvr2_hdw_remove_usb_stuff(hdw); LOCK_GIVE(hdw->ctl_lock); -- 2.30.2