[PATCH net-next v1] virtio/vsock: check transport before skb allocation

[PATCH net-next v1] virtio/vsock: check transport before skb allocation

[Arseniy Krasnov]

Pointer to transport could be checked before allocation of skbuff, thus
there is no need to free skbuff when this pointer is NULL.

Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
Reviewed-by: Bobby Eshleman <bobby.eshleman@bytedance.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
---
 net/vmw_vsock/virtio_transport_common.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
index cda587196475..607149259e8b 100644
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -867,6 +867,9 @@ static int virtio_transport_reset_no_sock(const struct virtio_transport *t,
 	if (le16_to_cpu(hdr->op) == VIRTIO_VSOCK_OP_RST)
 		return 0;
 
+	if (!t)
+		return -ENOTCONN;
+
 	reply = virtio_transport_alloc_skb(&info, 0,
 					   le64_to_cpu(hdr->dst_cid),
 					   le32_to_cpu(hdr->dst_port),
@@ -875,11 +878,6 @@ static int virtio_transport_reset_no_sock(const struct virtio_transport *t,
 	if (!reply)
 		return -ENOMEM;
 
-	if (!t) {
-		kfree_skb(reply);
-		return -ENOTCONN;
-	}
-
 	return t->send_pkt(reply);
 }
 
-- 
2.25.1

Re: [PATCH net-next v1] virtio/vsock: check transport before skb allocation

[Pavan Chebbi]

[-- Attachment #1: Type: text/plain, Size: 1638 bytes --]

On Mon, Mar 20, 2023 at 11:25 PM Arseniy Krasnov
<avkrasnov@sberdevices.ru> wrote:
>
> Pointer to transport could be checked before allocation of skbuff, thus
> there is no need to free skbuff when this pointer is NULL.
>
> Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
> Reviewed-by: Bobby Eshleman <bobby.eshleman@bytedance.com>
> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
> ---

Looks good to me.
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>

>  net/vmw_vsock/virtio_transport_common.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
> index cda587196475..607149259e8b 100644
> --- a/net/vmw_vsock/virtio_transport_common.c
> +++ b/net/vmw_vsock/virtio_transport_common.c
> @@ -867,6 +867,9 @@ static int virtio_transport_reset_no_sock(const struct virtio_transport *t,
>         if (le16_to_cpu(hdr->op) == VIRTIO_VSOCK_OP_RST)
>                 return 0;
>
> +       if (!t)
> +               return -ENOTCONN;
> +
>         reply = virtio_transport_alloc_skb(&info, 0,
>                                            le64_to_cpu(hdr->dst_cid),
>                                            le32_to_cpu(hdr->dst_port),
> @@ -875,11 +878,6 @@ static int virtio_transport_reset_no_sock(const struct virtio_transport *t,
>         if (!reply)
>                 return -ENOMEM;
>
> -       if (!t) {
> -               kfree_skb(reply);
> -               return -ENOTCONN;
> -       }
> -
>         return t->send_pkt(reply);
>  }
>
> --
> 2.25.1

[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/pkcs7-signature, Size: 4209 bytes --]

Re: [PATCH net-next v1] virtio/vsock: check transport before skb allocation

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (main)
by Paolo Abeni <pabeni@redhat.com>:

On Mon, 20 Mar 2023 20:43:29 +0300 you wrote:
> Pointer to transport could be checked before allocation of skbuff, thus
> there is no need to free skbuff when this pointer is NULL.
> 
> Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
> Reviewed-by: Bobby Eshleman <bobby.eshleman@bytedance.com>
> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
> 
> [...]

Here is the summary with links:
  - [net-next,v1] virtio/vsock: check transport before skb allocation
    https://git.kernel.org/netdev/net-next/c/4d1f51551777

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html