netdev - Re: [PATCH 2.6.25][resend] rndis_host: fix oops when query for OID_GEN_PHYSICAL

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] [day] [month] [year] [list]

Message-ID: <47E9C103.8050608@pobox.com>
Date:	Tue, 25 Mar 2008 23:20:35 -0400
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Jussi Kivilinna <jussi.kivilinna@...et.fi>
CC:	netdev@...r.kernel.org, dbrownell@...rs.sourceforge.net,
	davem@...emloft.net
Subject: Re: [PATCH 2.6.25][resend] rndis_host: fix oops when query for OID_GEN_PHYSICAL_MEDIUM
 fails

Jussi Kivilinna wrote:
> From: Jussi Kivilinna <jussi.kivilinna@...et.fi>
> 
> When query for OID_GEN_PHYSICAL_MEDIUM fails, uninitialized pointer
> 'phym' is being accessed in generic_rndis_bind(), resulting OOPS.
> Patch fixes phym to be initialized and setup correctly when
> rndis_query() for physical medium fails.
> 
> Bug was introduced by following commit:
> commit 039ee17d1baabaa21783a0d5ab3e8c6d8c794bdf
> Author: Jussi Kivilinna <jussi.kivilinna@...et.fi>
> Date:   Sun Jan 27 23:34:33 2008 +0200
> 
> Reported-by: Dmitri Monakhov <dmonakhov@...nvz.org>
> Signed-off-by: Jussi Kivilinna <jussi.kivilinna@...et.fi>
> Acked-by: David Brownell <dbrownell@...rs.sourceforge.net>
> ---
> 
>  drivers/net/usb/rndis_host.c |    9 ++++++---
>  1 files changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c
> index a613247..1b810ab 100644
> --- a/drivers/net/usb/rndis_host.c
> +++ b/drivers/net/usb/rndis_host.c
> @@ -287,7 +287,7 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
>  		struct rndis_set_c	*set_c;
>  		struct rndis_halt	*halt;
>  	} u;
> -	u32			tmp, *phym;
> +	u32			tmp, phym_unspec, *phym;
>  	int			reply_len;
>  	unsigned char		*bp;
>  
> @@ -359,12 +359,15 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
>  		goto halt_fail_and_release;
>  
>  	/* Check physical medium */
> +	phym = NULL;
>  	reply_len = sizeof *phym;
>  	retval = rndis_query(dev, intf, u.buf, OID_GEN_PHYSICAL_MEDIUM,
>  			0, (void **) &phym, &reply_len);
> -	if (retval != 0)
> +	if (retval != 0 || !phym) {
>  		/* OID is optional so don't fail here. */
> -		*phym = RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED;
> +		phym_unspec = RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED;
> +		phym = &phym_unspec;
> +	}

applied


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html