netdev - Re: [PATCH] xfrm: fix crash in XFRM_MSG

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Date:	Tue, 5 Jul 2016 12:14:12 +0200
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	Vegard Nossum <vegard.nossum@...cle.com>,
	Steffen Klassert <steffen.klassert@...unet.com>,
	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH] xfrm: fix crash in XFRM_MSG_GETSA netlink handler

Le 05/07/2016 10:18, Vegard Nossum a écrit :
> If we hit any of the error conditions inside xfrm_dump_sa(), then
> xfrm_state_walk_init() never gets called. However, we still call
> xfrm_state_walk_done() from xfrm_dump_sa_done(), which will crash
> because the state walk was never initialized properly.
> 
> We can fix this by setting cb->args[0] only after we've processed the
> first element and checking this before calling xfrm_state_walk_done().
> 
> Fixes: d3623099d3 ("ipsec: add support of limited SA dump")
> Cc: Nicolas Dichtel <nicolas.dichtel@...nd.com>
> Cc: Steffen Klassert <steffen.klassert@...unet.com>
> Signed-off-by: Vegard Nossum <vegard.nossum@...cle.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>

Thank you for the fix!