From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CECDC19D8BC; Sat, 12 Sep 2026 10:38:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789209534; cv=none; b=ZiOOaktyLCbAEFle/c2NeZQw4baCSciWFNc2VHAN/oHxW+uxoC96aXYfCNMITmE73dp4mOkrzg2tVp9OfpabJ7lEtn3w8MzBdNENPbo4NezI/QpKCTMgsFtRiJNasMta8XkgeBNPHrBdYZDbUP6Q5LbdFxpH/gmvPnbrEIziAww= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789209534; c=relaxed/simple; bh=oA9XjsFxcRsVHP/b1R8YMFH1FFhvnzo/EwVsVmUel2c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=albLY28Ynxx+xYWwMRVNi26UTvCMiJQd9RO/0UfkWj4x+8KqiKMXhCxPlJ/kvdMJ3FC7dzpnNqwi+lRVMRVyN85pL2b0uaHaGmdv+zEpt4F1AxBNiN/k1xzeqW6FbUof/e33sjStaGTmRqAtAr4yHbgDzAPoO0PYKsiOYYc7zdU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Yk/PGq2N; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Yk/PGq2N" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 572601F000FF; Sat, 12 Sep 2026 10:38:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789209533; bh=2vG5KAw2tAMDKh6w+qdthU9wvFujvVN9W7s13GHm36A=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Yk/PGq2Np7FLsBglJ5mpNS+OASIuW/1b6bnEexxvjVrzT9ReTzSRKXDjCE04nFIF/ ksj3iaVGU2l5X44DTW6XnpxONdmza8j12FjPI+1mtviWuk1RRZ+vQsaqesxbrw1ply TPBPEi/0ZHE3EK0vhIczgaM7aiuTB0gC1Okvw/1w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+9eebf5f6544c5e873858@syzkaller.appspotmail.com, Yousef Alhouseen , Jiri Kosina , Sasha Levin Subject: [PATCH 6.18 0841/1518] HID: synchronize input before cleaning up a failed probe Date: Sat, 12 Sep 2026 08:50:10 +0200 Message-ID: <20260912065642.465042764@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065623.398859879@linuxfoundation.org> References: <20260912065623.398859879@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yousef Alhouseen [ Upstream commit 207853d46f7ef2e28042344a1468da8754c3ddbf ] hid_device_io_start() allows reports to run concurrently with probe. If the probe subsequently fails, __hid_device_probe() releases driver resources and clears hdev->driver without first excluding those report callbacks. For example, a report may enter hidraw_report_event() while the failure path frees the associated hidraw object, leading to a use-after-free when the report takes the object's list lock. Stop input before performing failed-probe cleanup. This reacquires driver_input_lock and waits for any report callback already in progress. Fixes: c849a6143bec ("HID: Separate struct hid_device's driver_lock into two locks.") Reported-by: syzbot+9eebf5f6544c5e873858@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=9eebf5f6544c5e873858 Signed-off-by: Yousef Alhouseen Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin --- drivers/hid/hid-core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index 55990d17c5669..78adb5a48a612 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -2852,6 +2852,8 @@ static int __hid_device_probe(struct hid_device *hdev, struct hid_driver *hdrv) */ if (ret) { + if (hdev->io_started) + hid_device_io_stop(hdev); devres_release_group(&hdev->dev, hdev->devres_group_id); hid_close_report(hdev); hdev->driver = NULL; -- 2.53.0