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 EF9C83546FA; Sat, 12 Sep 2026 17:04:48 +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=1789232690; cv=none; b=C64UyEhWf2OWYPg0Btn0DQSZREAFBG7E4lcbhO4d6DHOmC6IwO94nlu907LU+jyX2VGlmwiCUfgAFt8Fk5yrVnrITn3VZ3m84r9kgwtuh07r9gmUt6gIwwKdWmoeEM6Hrut+Q5/oCdV9v2aDG8yoLtD9U2MZ2dl7HYwk5DDADcQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789232690; c=relaxed/simple; bh=chTdKffnmX7Fa+k4SQS0UyRjucmXdyQDqf2WvXpQEFM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TFn7nFMBFqPlsg2O3bX/AMAOsonRUOxFl85EwzaflC4q7CoMvxAxAkzRrBsIPI95XBJkG0uFkft6nHCbNxBMn3mI/kVNDhLYYjJB+SwC9TtNXzEZ2lgJBZiBcutekntR4OSxbJpir10o1VNJqlIXxAPs3sMQHx8knn2KqAMZ5GE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=EA/Td+u+; 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="EA/Td+u+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C6691F000FF; Sat, 12 Sep 2026 17:04:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789232688; bh=lj2puCMzB5MikOHReJPePVJixId4f/D4LYVe7Ii6Lk0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=EA/Td+u+ms1reOhQY0TmKtZ7T8U6pWLKhWScVCXyyRnfJ6UP1LBLeQPKZiK6Kj1Ol mvB339EK1p8pWNCs79LsENOJ2z0wZ90NO2APImB/CMM0O82t2UmLL23h67KHz9CcXZ M6gUsvr56k7DzJ9rjtOQj/ApFEV7Fd1+A6sGcyvQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xu Rao , Jiri Kosina Subject: [PATCH 5.15 060/935] HID: roccat: free buffered reports when destroying device Date: Sat, 12 Sep 2026 08:51:30 +0200 Message-ID: <20260912065528.216355880@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Xu Rao commit bbff0ccbff360a5498075525005f6a913239a3d7 upstream. roccat_report_event() duplicates each report with kmemdup() and stores the allocation in a circular-buffer slot. The allocation is released only when that slot is reused. The device destruction paths free struct roccat_device without releasing reports still stored in cbuf[]. This makes those allocations unreachable and leaks up to ROCCAT_CBUF_SIZE report buffers per device. Add a small destructor that frees every buffered report before freeing the device, and use it in both paths that can destroy a registered device. Fixes: 206f5f2fcb5f ("HID: roccat: propagate special events of roccat hardware to userspace") Cc: stable@vger.kernel.org Signed-off-by: Xu Rao Signed-off-by: Jiri Kosina Signed-off-by: Greg Kroah-Hartman --- drivers/hid/hid-roccat.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) --- a/drivers/hid/hid-roccat.c +++ b/drivers/hid/hid-roccat.c @@ -70,6 +70,15 @@ static struct roccat_device *devices[ROC /* protects modifications of devices array */ static DEFINE_MUTEX(devices_lock); +static void roccat_free_device(struct roccat_device *device) +{ + int i; + + for (i = 0; i < ROCCAT_CBUF_SIZE; i++) + kfree(device->cbuf[i].value); + kfree(device); +} + static ssize_t roccat_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) { @@ -226,7 +235,7 @@ static int roccat_release(struct inode * hid_hw_power(device->hid, PM_HINT_NORMAL); hid_hw_close(device->hid); } else { - kfree(device); + roccat_free_device(device); } } @@ -374,7 +383,7 @@ void roccat_disconnect(int minor) hid_hw_close(device->hid); wake_up_interruptible(&device->wait); } else { - kfree(device); + roccat_free_device(device); } } EXPORT_SYMBOL_GPL(roccat_disconnect);