netdev - Re: [PATCH net] ibmvnic: Fix returning uninitialized return code

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: <0a335b1f7532fb6bd3d8e685a52d691760b1e226.camel@kernel.org>
Date:   Wed, 16 Sep 2020 23:07:00 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     Thomas Falcon <tlfalcon@...ux.ibm.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net] ibmvnic: Fix returning uninitialized return code

On Wed, 2020-09-16 at 17:12 -0500, Thomas Falcon wrote:
> If successful, __ibmvnic_open and reset_sub_crq_queues,
> if no device queues exist, will return an uninitialized
> variable rc. Return zero on success instead.
> 
> Fixes: 57a49436f4e8 ("ibmvnic: Reset sub-crqs during driver reset")
> Fixes: ed651a10875f ("ibmvnic: Updated reset handling")
> Signed-off-by: Thomas Falcon <tlfalcon@...ux.ibm.com>
> ---
>  drivers/net/ethernet/ibm/ibmvnic.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/ibm/ibmvnic.c
> b/drivers/net/ethernet/ibm/ibmvnic.c
> index 1b702a4..1619311 100644
> --- a/drivers/net/ethernet/ibm/ibmvnic.c
> +++ b/drivers/net/ethernet/ibm/ibmvnic.c
> @@ -1178,7 +1178,7 @@ static int __ibmvnic_open(struct net_device
> *netdev)
>  	}
>  
>  	adapter->state = VNIC_OPEN;
> -	return rc;
> +	return 0;

rc here is unconditionally assigned a couple of lines earlier, 
but anyway i don't mind this change as it explicitly states that this
is a success path.

But maybe you want to split the patch and send this hunk to net-next.
I don't mind, up to you.

>  }
>  
>  static int ibmvnic_open(struct net_device *netdev)
> @@ -2862,7 +2862,7 @@ static int reset_sub_crq_queues(struct
> ibmvnic_adapter *adapter)
>  			return rc;
>  	}
>  
> -	return rc;
> +	return 0;

This one though is fine,

Reviewed-by: Saeed Mahameed <saeedm@...dia.com>