linux-kernel - Re: [PATCH 1/1] ieee802154: fix error return code in ieee802154_add

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] [day] [month] [year] [list]

Message-ID: <03320214-828c-4ac8-0fb8-89bd78b85c97@datenfreihafen.org>
Date:   Thu, 3 Jun 2021 10:53:55 +0200
From:   Stefan Schmidt <stefan@...enfreihafen.org>
To:     Zhen Lei <thunder.leizhen@...wei.com>,
        Alexander Aring <alex.aring@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-wpan <linux-wpan@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] ieee802154: fix error return code in
 ieee802154_add_iface()

Hello.

On 08.05.21 08:25, Zhen Lei wrote:
> Fix to return a negative error code from the error handling
> case instead of 0, as done elsewhere in this function.
> 
> Fixes: be51da0f3e34 ("ieee802154: Stop using NLA_PUT*().")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
> ---
>   net/ieee802154/nl-phy.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c
> index 2cdc7e63fe17..88215b5c93aa 100644
> --- a/net/ieee802154/nl-phy.c
> +++ b/net/ieee802154/nl-phy.c
> @@ -241,8 +241,10 @@ int ieee802154_add_iface(struct sk_buff *skb, struct genl_info *info)
>   	}
>   
>   	if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
> -	    nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name))
> +	    nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name)) {
> +		rc = -EMSGSIZE;
>   		goto nla_put_failure;
> +	}
>   	dev_put(dev);
>   
>   	wpan_phy_put(phy);
> 

Good find. We could indeed hit a case where the IEEE802154_ATTR_HW_ADDR 
attribute is present and rc would be assigned 0 before reaching this 
goto nla_put_failure

This patch has been applied to the wpan tree and will be
part of the next pull request to net. Thanks!

regards
Stefan Schmidt