netdev - Re: [Patch net-next] vsock: always call vsock_init

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Date:   Thu, 26 Oct 2017 10:21:16 +0200
From:   Stefan Hajnoczi <stefanha@...hat.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     netdev@...r.kernel.org, Jorgen Hansen <jhansen@...are.com>
Subject: Re: [Patch net-next] vsock: always call vsock_init_tables()

On Tue, Oct 24, 2017 at 03:30:37PM -0700, Cong Wang wrote:
> Although CONFIG_VSOCKETS_DIAG depends on CONFIG_VSOCKETS,
> vsock_init_tables() is not always called, it is called only
> if other modules call its caller. Therefore if we only
> enable CONFIG_VSOCKETS_DIAG, it would crash kernel on uninitialized
> vsock_bind_table.
> 
> This patch fixes it by moving vsock_init_tables() to its own
> module_init().
> 
> Fixes: 413a4317aca7 ("VSOCK: add sock_diag interface")
> Reported-by: syzkaller bot
> Cc: Stefan Hajnoczi <stefanha@...hat.com>
> Cc: Jorgen Hansen <jhansen@...are.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
> ---
>  net/vmw_vsock/af_vsock.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)

Thank you, Cong Wang!  I was just trying to figure out the syzkaller bug
report and you've already fixed it :).  The patch looks good.

Reviewed-by: Stefan Hajnoczi <stefanha@...hat.com>