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  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:   Wed, 29 Sep 2021 13:24:05 +0300
From:   Tariq Toukan <ttoukan.linux@...il.com>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Tariq Toukan <tariqt@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH][net-next] net/mlx4: Use array_size() helper in
 copy_to_user()



On 9/28/2021 11:17 PM, Gustavo A. R. Silva wrote:
> Use array_size() helper instead of the open-coded version in
> copy_to_user(). These sorts of multiplication factors need
> to be wrapped in array_size().
> 
> Link: https://github.com/KSPP/linux/issues/160
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> ---
>   drivers/net/ethernet/mellanox/mlx4/cq.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/mellanox/mlx4/cq.c b/drivers/net/ethernet/mellanox/mlx4/cq.c
> index f7053a74e6a8..4d4f9cf9facb 100644
> --- a/drivers/net/ethernet/mellanox/mlx4/cq.c
> +++ b/drivers/net/ethernet/mellanox/mlx4/cq.c
> @@ -314,7 +314,8 @@ static int mlx4_init_user_cqes(void *buf, int entries, int cqe_size)
>   			buf += PAGE_SIZE;
>   		}
>   	} else {
> -		err = copy_to_user((void __user *)buf, init_ents, entries * cqe_size) ?
> +		err = copy_to_user((void __user *)buf, init_ents,
> +				   array_size(entries, cqe_size)) ?
>   			-EFAULT : 0;
>   	}
>   
> 

Thanks for your patch.
Reviewed-by: Tariq Toukan <tariqt@...dia.com>

Powered by blists - more mailing lists