netdev - Re: [PATCH net,v5,2/2] net/smc: modify smc

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Message-Id: <20240820103425.338094-1-aha310510@gmail.com>
Date: Tue, 20 Aug 2024 19:34:25 +0900
From: Jeongjun Park <aha310510@...il.com>
To: aha310510@...il.com
Cc: alibuda@...ux.alibaba.com,
	davem@...emloft.net,
	dust.li@...ux.alibaba.com,
	edumazet@...gle.com,
	guwen@...ux.alibaba.com,
	jaka@...ux.ibm.com,
	kuba@...nel.org,
	linux-kernel@...r.kernel.org,
	linux-s390@...r.kernel.org,
	netdev@...r.kernel.org,
	pabeni@...hat.com,
	tonylu@...ux.alibaba.com,
	ubraun@...ux.vnet.ibm.com,
	utz.bacher@...ibm.com,
	wenjia@...ux.ibm.com,
	syzkaller <syzkaller@...glegroups.com>
Subject: Re: [PATCH net,v5,2/2] net/smc: modify smc_sock structure

Jeongjun Park wrote:
> Since inet_sk(sk)->pinet6 and smc_sk(sk)->clcsock practically
> point to the same address, when smc_create_clcsk() stores the newly
> created clcsock in smc_sk(sk)->clcsock, inet_sk(sk)->pinet6 is corrupted
> into clcsock. This causes NULL pointer dereference and various other
> memory corruptions.
> 
> To solve this, we need to modify the smc_sock structure.
> 
> Fixes: ac7138746e14 ("smc: establish new socket family")
> Signed-off-by: Jeongjun Park <aha310510@...il.com>

Reported-by: syzkaller <syzkaller@...glegroups.com>