Hi Mike!

Thank you for your reply!
Do I need to submit a new patch to kfree_sensitive for 'password_in' and 
'usernames'?


regards,
Minjie

-----邮件原件-----
发件人: Mike Christie <[email protected]> 
发送时间: 2023年7月18日 2:26
收件人: 杜敏杰 <[email protected]>; Lee Duncan <[email protected]>; Chris Leech 
<[email protected]>; James E.J. Bottomley <[email protected]>; Martin K. 
Petersen <[email protected]>; open list:ISCSI 
<[email protected]>; open list:ISCSI <[email protected]>; 
open list <[email protected]>
抄送: opensource.kernel <[email protected]>
主题: Re: [PATCH v1] scsi: iscsi: use kfree_sensitive() in iscsi_session_free()

On 7/17/23 4:26 AM, Minjie Du wrote:
> session might contain private part of the password, so better use
> kfree_sensitive() to free it.
> In iscsi_session_free() use kfree_sensitive() to free session->password.
> 
> Signed-off-by: Minjie Du <[email protected]>
> ---
>  drivers/scsi/libiscsi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 
> 0fda8905e..2f273229c 100644
> --- a/drivers/scsi/libiscsi.c
> +++ b/drivers/scsi/libiscsi.c
> @@ -3132,7 +3132,7 @@ void iscsi_session_free(struct iscsi_cls_session 
> *cls_session)
>       struct module *owner = cls_session->transport->owner;
>  
>       iscsi_pool_free(&session->cmdpool);
> -     kfree(session->password);
> +     kfree_sensitive(session->password);
>       kfree(session->password_in);

You then also want kfree_sensitive for password_in.

I would also use it for the usernames then too.

>       kfree(session->username);
>       kfree(session->username_in);

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