netdev - Re: [PATCH v3 net] net: Fix load-tearing on sk->sk_stamp in sock_recv

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Message-ID: <CANn89iJeghZDYPKbaUcDmbX6wz6NCkwpPfg9WPyvGRq5LSpknw@mail.gmail.com>
Date: Tue, 9 May 2023 11:07:16 +0200
From: Eric Dumazet <edumazet@...gle.com>
To: Kuniyuki Iwashima <kuniyu@...zon.com>
Cc: "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>, Kuniyuki Iwashima <kuni1840@...il.com>, netdev@...r.kernel.org, 
	syzbot <syzkaller@...glegroups.com>
Subject: Re: [PATCH v3 net] net: Fix load-tearing on sk->sk_stamp in sock_recv_cmsgs().

On Mon, May 8, 2023 at 7:56 PM Kuniyuki Iwashima <kuniyu@...zon.com> wrote:
>
> KCSAN found a data race in sock_recv_cmsgs() where the read access
> to sk->sk_stamp needs READ_ONCE().
>
>
> Fixes: 6c7c98bad488 ("sock: avoid dirtying sk_stamp, if possible")
> Reported-by: syzbot <syzkaller@...glegroups.com>
> Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.com>
> ---

Reviewed-by: Eric Dumazet <edumazet@...gle.com>

Thanks.