linux-kernel - Re: [PATCH v2 04/31] ntsync: Introduce NTSYNC_IOC_WAIT

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Date: Mon, 11 Mar 2024 13:58:18 -0500
From: Elizabeth Figura <zfigura@...eweavers.com>
To: Arnd Bergmann <arnd@...db.de>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Jonathan Corbet <corbet@....net>, Shuah Khan <shuah@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
 wine-devel@...ehq.org,
 André Almeida <andrealmeid@...lia.com>,
 Wolfram Sang <wsa@...nel.org>, Arkadiusz Hiler <ahiler@...eweavers.com>,
 Peter Zijlstra <peterz@...radead.org>, Andy Lutomirski <luto@...nel.org>,
 linux-doc@...r.kernel.org, linux-kselftest@...r.kernel.org,
 Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCH v2 04/31] ntsync: Introduce NTSYNC_IOC_WAIT_ANY.

On Monday, 19 February 2024 16:38:06 CDT Elizabeth Figura wrote:
> +static struct ntsync_obj *get_obj(struct ntsync_device *dev, int fd)
> +{
> +	struct file *file = fget(fd);
> +	struct ntsync_obj *obj;
> +
> +	if (file->f_op != &ntsync_obj_fops) {
> +		fput(file);
> +		return NULL;
> +	}

I just noticed during self-review that this fails to check the result of 
fget() for NULL :-/

I'll fix this next revision.

> +
> +	obj = file->private_data;
> +	if (obj->dev != dev) {
> +		fput(file);
> +		return NULL;
> +	}
> +
> +	return obj;
> +}