netdev - Re: [PATCH net-next] inetpeer: fix data-race in inet_putpeer / inet

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Message-Id: <20191107.161617.487096520289194233.davem@davemloft.net>
Date:   Thu, 07 Nov 2019 16:16:17 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com,
        syzkaller@...glegroups.com
Subject: Re: [PATCH net-next] inetpeer: fix data-race in inet_putpeer /
 inet_putpeer

From: Eric Dumazet <edumazet@...gle.com>
Date: Thu,  7 Nov 2019 10:30:42 -0800

> We need to explicitely forbid read/store tearing in inet_peer_gc()
> and inet_putpeer().
> 
> The following syzbot report reminds us about inet_putpeer()
> running without a lock held.
> 
> BUG: KCSAN: data-race in inet_putpeer / inet_putpeer
 ...
> Fixes: 4b9d9be839fd ("inetpeer: remove unused list")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Reported-by: syzbot <syzkaller@...glegroups.com>

Applied.