netdev - Re: [PATCH v2 net] gtp: fix an use-before-init in gtp

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 26 Oct 2020 11:46:33 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Masahiro Fujiwara <fujiwara.masahiro@...il.com>
Cc:     Pablo Neira Ayuso <pablo@...filter.org>,
        Harald Welte <laforge@...monks.org>,
        "David S. Miller" <davem@...emloft.net>,
        Andreas Schultz <aschultz@...p.net>,
        osmocom-net-gprs@...ts.osmocom.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 net] gtp: fix an use-before-init in gtp_newlink()

On Mon, 26 Oct 2020 16:22:27 +0900 Masahiro Fujiwara wrote:
> v2:
>  - leave out_hashtable: label for clarity (Jakub).
>  - fix code and comment styles.

Thanks!

> diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
> index 8e47d0112e5d..07cb6d9495e8 100644
> --- a/drivers/net/gtp.c
> +++ b/drivers/net/gtp.c
> @@ -663,10 +663,6 @@ static int gtp_newlink(struct net *src_net, struct net_device *dev,
>  
>  	gtp = netdev_priv(dev);
>  
> -	err = gtp_encap_enable(gtp, data);
> -	if (err < 0)
> -		return err;
> -
>  	if (!data[IFLA_GTP_PDP_HASHSIZE]) {
>  		hashsize = 1024;
>  	} else {
> @@ -676,13 +672,17 @@ static int gtp_newlink(struct net *src_net, struct net_device *dev,
>  	}
>  
>  	err = gtp_hashtable_new(gtp, hashsize);
> +	if (err < 0)
> +		return err;
> +
> +	err = gtp_encap_enable(gtp, data);
>  	if (err < 0)
>  		goto out_encap;

This needs to say goto out_hashtable; now.