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Subject: Re: [PATCH net v2] vsock/virtio: bind uarg before filling zerocopy
 skb
From: patchwork-bot+netdevbpf@kernel.org
Message-Id: 
 <178008421264.1939215.14797550643980385939.git-patchwork-notify@kernel.org>
Date: Fri, 29 May 2026 19:50:12 +0000
References: <20260527023301.1075581-1-malin89@huawei.com>
In-Reply-To: <20260527023301.1075581-1-malin89@huawei.com>
To: Lin Ma <malin89@huawei.com>
Cc: kuba@kernel.org, avkrasnov@salutedevices.com, cenxianlong@huawei.com,
 chenzhe@huawei.com, cuirongzhen@huawei.com, davem@davemloft.net,
 edumazet@google.com, eperezma@redhat.com, horms@kernel.org,
 jasowang@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
 mst@redhat.com, netdev@vger.kernel.org, pabeni@redhat.com,
 sgarzare@redhat.com, stefanha@redhat.com, tanjingguo@huawei.com,
 virtualization@lists.linux.dev, xuanzhuo@linux.alibaba.com

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Wed, 27 May 2026 10:33:01 +0800 you wrote:
> From: Jingguo Tan <tanjingguo@huawei.com>
> 
> virtio_transport_send_pkt_info() allocates or reuses the zerocopy uarg
> before entering the send loop, but virtio_transport_alloc_skb() still
> fills the skb before it inherits that uarg. When fixed-buffer vectored
> zerocopy hits MAX_SKB_FRAGS, io_sg_from_iter() may partially attach
> managed frags and return -EMSGSIZE. The rollback path call kfree_skb()
> to free an skb that carries SKBFL_MANAGED_FRAG_REFS but no uarg, so
> skb_release_data() falls through to ordinary frag unref.
> 
> [...]

Here is the summary with links:
  - [net,v2] vsock/virtio: bind uarg before filling zerocopy skb
    https://git.kernel.org/netdev/net/c/1e584c304cfb

You are awesome, thank you!
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