linux-kernel - Re: [PATCH] net: wireless: cisco: Fix possible uninit bug

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]

Message-ID: <a8c6e741a9c704dad9b63e1e85136a8e6da09b44.camel@redhat.com>
Date:   Thu, 06 Jul 2023 09:53:53 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     Yu Hao <yhao016@....edu>, kvalo@...nel.org, keescook@...omium.org,
        gustavoars@...nel.org, Jason@...c4.com,
        linux-wireless@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: wireless: cisco: Fix possible uninit bug

On Tue, 2023-07-04 at 16:50 -0700, Yu Hao wrote:
> The struct cap_rid should be initialized by function readCapabilityRid.
> However, there is not return value check. Iit is possible that
> the function readCapabilityRid returns error code and cap_rid.softCap
> is not initialized. But there is a read later for this field.
> 
> Signed-off-by: Yu Hao <yhao016@....edu>
> ---
>  drivers/net/wireless/cisco/airo.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/cisco/airo.c
> b/drivers/net/wireless/cisco/airo.c
> index 7c4cc5f5e1eb..b3736d76a5d5 100644
> --- a/drivers/net/wireless/cisco/airo.c
> +++ b/drivers/net/wireless/cisco/airo.c
> @@ -6950,8 +6950,11 @@ static int airo_get_range(struct net_device *dev,
>     CapabilityRid cap_rid;      /* Card capability info */
>     int     i;
>     int     k;
> +   int     status;
> 
> -   readCapabilityRid(local, &cap_rid, 1);
> +   status = readCapabilityRid(local, &cap_rid, 1);
> +   if (status != SUCCESS)
> +       return ERROR;

This value is returned directly to the network stack, you must use a
standard error code instead (e.g. -EINVAL).

Also, please add a suitable 'Fixes' tag, thanks!

Paolo