From: Michael Buesch <mb@bu3sch.de>
To: bcm43xx-dev@lists.berlios.de
Cc: Stefano Brivio <stefano.brivio@polimi.it>,
"John W. Linville" <linville@tuxdriver.com>,
linux-wireless@vger.kernel.org
Subject: Re: [PATCH] b43: fix use-after-free rfkill bug
Date: Sun, 13 Jan 2008 18:41:10 +0100 [thread overview]
Message-ID: <200801131841.10393.mb@bu3sch.de> (raw)
In-Reply-To: <20080113183014.675e64a3@morte>
On Sunday 13 January 2008 18:30:14 Stefano Brivio wrote:
> Fix rfkill code which caused a use-after-free bug.
>
> Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
> ---
> Index: wireless-2.6/drivers/net/wireless/b43/rfkill.c
> ===================================================================
> --- wireless-2.6.orig/drivers/net/wireless/b43/rfkill.c
> +++ wireless-2.6/drivers/net/wireless/b43/rfkill.c
> @@ -138,8 +138,11 @@ void b43_rfkill_init(struct b43_wldev *d
> rfk->rfkill->user_claim_unsupported = 1;
>
> rfk->poll_dev = input_allocate_polled_device();
> - if (!rfk->poll_dev)
> - goto err_free_rfk;
> + if (!rfk->poll_dev) {
> + rfkill_free(rfk->rfkill);
> + goto err_freed_rfk;
> + }
> +
> rfk->poll_dev->private = dev;
> rfk->poll_dev->poll = b43_rfkill_poll;
> rfk->poll_dev->poll_interval = 1000; /* msecs */
> @@ -175,8 +178,7 @@ err_unreg_rfk:
> err_free_polldev:
> input_free_polled_device(rfk->poll_dev);
> rfk->poll_dev = NULL;
> -err_free_rfk:
> - rfkill_free(rfk->rfkill);
> +err_freed_rfk:
> rfk->rfkill = NULL;
> out_error:
> rfk->registered = 0;
> @@ -195,6 +197,5 @@ void b43_rfkill_exit(struct b43_wldev *d
> rfkill_unregister(rfk->rfkill);
> input_free_polled_device(rfk->poll_dev);
> rfk->poll_dev = NULL;
> - rfkill_free(rfk->rfkill);
> rfk->rfkill = NULL;
> }
Acked-by: Michael Buesch <mb@bu3sch.de>
--
Greetings Michael.
prev parent reply other threads:[~2008-01-13 17:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-13 17:30 [PATCH] b43: fix use-after-free rfkill bug Stefano Brivio
2008-01-13 17:41 ` Michael Buesch [this message]
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