RE: [PATCH v3] virtio_vsock: Fix race condition in virtio_transport_recv_pkt()

From: Justin He
Date: Sat May 30 2020 - 08:26:49 EST

Hi Markus

> -----Original Message-----
> From: Markus Elfring <Markus.Elfring@xxxxxx>
> Sent: Saturday, May 30, 2020 6:41 PM
> To: Justin He <Justin.He@xxxxxxx>; kvm@xxxxxxxxxxxxxxx;
> netdev@xxxxxxxxxxxxxxx; virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
> Cc: kernel-janitors@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> stable@xxxxxxxxxxxxxxx; David S. Miller <davem@xxxxxxxxxxxxx>; Jakub
> Kicinski <kuba@xxxxxxxxxx>; Kaly Xin <Kaly.Xin@xxxxxxx>; Stefan Hajnoczi
> <stefanha@xxxxxxxxxx>; Stefano Garzarella <sgarzare@xxxxxxxxxx>
> Subject: Re: [PATCH v3] virtio_vsock: Fix race condition in
> virtio_transport_recv_pkt()
> > This fixes it by checking sk->sk_shutdown(suggested by Stefano) after
> > lock_sock since sk->sk_shutdown is set to SHUTDOWN_MASK under the
> > protection of lock_sock_nested.
> How do you think about a wording variant like the following?
> Thus check the data structure member âsk_shutdownâ (suggested by Stefano)
> after a call of the function âlock_sockâ since this field is set to
> âSHUTDOWN_MASKâ under the protection of âlock_sock_nestedâ.
Okay, will update the commit msg.

> Would you like to add the tag âFixesâ to the commit message?


Justin (Jia He)

> Regards,
> Markus
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