netdev - Re: [IPSEC] xfrm_state locking problem in xfrm

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: <20090512034813.GA25841@gondor.apana.org.au>
Date:	Tue, 12 May 2009 13:48:13 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Yury Polyanskiy <ypolyans@...nceton.EDU>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [IPSEC] xfrm_state locking problem in xfrm_input.c

On Mon, May 11, 2009 at 06:47:39PM -0400, Yury Polyanskiy wrote:
> xfrm_input() code uses spin_lock() where it must be using
> spin_lock_bh() instead. The corresponding code in xfrm_output.c
> correctly uses spin_lock_bh(). 
> 
> Note that if the locally generated packet is sent to a local ip,
> dev_queue_xmit() calls loopback_xmit() and the xfrm_input() will be
> called with softirqs enabled.

dev_queue_xmit always disables BH before calling the device xmit
function.  So how can this happen?

Thanks,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
--
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