linux-kernel - Re: [PATCH] ipmi_si: use smi_num for init

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Mon, 10 Apr 2017 11:59:48 -0500
From:   Corey Minyard <minyard@....org>
To:     Tony Camuso <tcamuso@...hat.com>,
        openipmi-developer@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ipmi_si: use smi_num for init_name

On 04/10/2017 11:22 AM, Tony Camuso wrote:
> Commit 1abf71e moved the creation of new_smi->dev to earlier in the init
> sequence in order to provide infrastructure for log printing.
>
> However, the init_name was created with a hard-coded value of zero. This
> presents a problem in systems with more than one interface, producing a
> call trace in dmesg.
>
> To correct the problem, simply use smi_num instead of the hard-coded
> value of zero.

Yeah, you are right.  And there's more, the platform_device_alloc will
also be wrong, which is even worse.

I'll revise your patch a bit...

-corey

> Tested on a lenovo x3950.
>
> Signed-off-by: Tony Camuso <tcamuso@...hat.com>
> ---
>   drivers/char/ipmi/ipmi_si_intf.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
> index 2a7c425..9d8fc51 100644
> --- a/drivers/char/ipmi/ipmi_si_intf.c
> +++ b/drivers/char/ipmi/ipmi_si_intf.c
> @@ -3526,7 +3526,7 @@ static int try_smi_init(struct smi_info *new_smi)
>   
>   	/* Do this early so it's available for logs. */
>   	if (!new_smi->dev) {
> -		init_name = kasprintf(GFP_KERNEL, "ipmi_si.%d", 0);
> +		init_name = kasprintf(GFP_KERNEL, "ipmi_si.%d", smi_num);
>   
>   		/*
>   		 * If we don't already have a device from something