Re: [PATCH] net: check the return value of the copy_from_sockptr

["D. Wythe" <alibuda@linux.alibaba.com>]

On 9/11/24 1:04 PM, Qianqiang Liu wrote:
> We must check the return value of the copy_from_sockptr. Otherwise, it
> may cause some weird issues.
>
> Signed-off-by: Qianqiang Liu <qianqiang.liu@163.com>
> ---
>   net/socket.c | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)

Looks like a fix patch, maybe you could add a fix tag.

> diff --git a/net/socket.c b/net/socket.c
> index 0a2bd22ec105..6b9a414d01d5 100644
> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -2370,8 +2370,11 @@ int do_sock_getsockopt(struct socket *sock, bool compat, int level,
>   	if (err)
>   		return err;
>   
> -	if (!compat)
> -		copy_from_sockptr(&max_optlen, optlen, sizeof(int));
> +	if (!compat) {
> +		err = copy_from_sockptr(&max_optlen, optlen, sizeof(int));
> +		if (err)
> +			return -EFAULT;
> +	}
>   
>   	ops = READ_ONCE(sock->ops);
>   	if (level == SOL_SOCKET) {