linux-kernel - Re: [TIP] BUG kmalloc-4096: Poison overwritten (ath5k_rx_skb

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

Message-ID: <49A70134.4070700@gmail.com>
Date:	Thu, 26 Feb 2009 21:53:08 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Bob Copeland <me@...copeland.com>
CC:	Sitsofe Wheeler <sitsofe@...oo.com>,
	Jiri Slaby <jirislaby@...il.com>,
	Nick Kossifidis <mickflemm@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
	ath5k-devel@...ema.h4ckr.net,
	"Luis R. Rodriguez" <lrodriguez@...eros.com>
Subject: Re: [TIP] BUG kmalloc-4096: Poison overwritten (ath5k_rx_skb_alloc)

On 26.2.2009 02:06, Bob Copeland wrote:
> --- a/drivers/net/wireless/ath5k/base.c
> +++ b/drivers/net/wireless/ath5k/base.c
> @@ -1140,12 +1140,14 @@ ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
>   	struct ath5k_hw *ah = sc->ah;
>   	struct sk_buff *skb = bf->skb;
>   	struct ath5k_desc *ds;
> +	dma_addr_t dma_addr;
>
>   	if (!skb) {
> -		skb = ath5k_rx_skb_alloc(sc,&bf->skbaddr);
> +		skb = ath5k_rx_skb_alloc(sc,&dma_addr);
>   		if (!skb)
>   			return -ENOMEM;
>   		bf->skb = skb;
> +		bf->skbaddr = dma_addr;

Hmm, rather than the caller, ath5k_rx_skb_alloc is wrong here in my 
eyes. It shouldn't touch the second parameter unless it knows it won't 
fail anymore.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/