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SubjectRE: [PATCH net] hv_sock: Suppress bogus "may be used uninitialized" warnings
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> -----Original Message-----
> From: linux-hyperv-owner@vger.kernel.org <linux-hyperv-owner@vger.kernel.org> On Behalf Of Dexuan Cui
> Sent: Friday, June 14, 2019 10:01 PM
> To: netdev@vger.kernel.org; davem@davemloft.net; Michael Kelley <mikelley@microsoft.com>
> Cc: linux-hyperv@vger.kernel.org; linux-kernel@vger.kernel.org; KY Srinivasan <kys@microsoft.com>; Stephen Hemminger
> <sthemmin@microsoft.com>; Haiyang Zhang <haiyangz@microsoft.com>; Sasha Levin <Alexander.Levin@microsoft.com>;
> olaf@aepfle.de; apw@canonical.com; jasowang@redhat.com; vkuznets <vkuznets@redhat.com>; marcelo.cerri@canonical.com;
> Dexuan Cui <decui@microsoft.com>
> Subject: [PATCH net] hv_sock: Suppress bogus "may be used uninitialized" warnings
>
> gcc 8.2.0 may report these bogus warnings under some condition:
>
> warning: ‘vnew’ may be used uninitialized in this function
> warning: ‘hvs_new’ may be used uninitialized in this function
>
> Actually, the 2 pointers are only initialized and used if the variable
> "conn_from_host" is true. The code is not buggy here.
>
> Signed-off-by: Dexuan Cui <decui@microsoft.com>
> ---
> net/vmw_vsock/hyperv_transport.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
> index 8d1ea9eda8a2..cd3f47f54fa7 100644
> --- a/net/vmw_vsock/hyperv_transport.c
> +++ b/net/vmw_vsock/hyperv_transport.c
> @@ -329,8 +329,8 @@ static void hvs_open_connection(struct vmbus_channel *chan)
>
> struct sockaddr_vm addr;
> struct sock *sk, *new = NULL;
> - struct vsock_sock *vnew;
> - struct hvsock *hvs, *hvs_new;
> + struct vsock_sock *vnew = NULL;
> + struct hvsock *hvs, *hvs_new = NULL;
> int ret;
>
These are all already fixed under
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=ac383f58f3c98de37fa67452acc5bd677396e9f3
Its just that that commit hasn't merged with the 'net' branch yet.
> if_type = &chan->offermsg.offer.if_type;
> --
> 2.19.1

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