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Date: Thu, 16 Nov 2023 10:29:32 +0000
To: Vlad Buslov <>
Subject: Re: [PATCH net] macvlan: Don't propagate promisc change to lower dev in


This patch was applied to netdev/net.git (main)
by Paolo Abeni <>:

On Tue, 14 Nov 2023 18:59:15 +0100 you wrote:
> Macvlan device in passthru mode sets its lower device promiscuous mode
> according to its MACVLAN_FLAG_NOPROMISC flag instead of synchronizing it to
> its own promiscuity setting. However, macvlan_change_rx_flags() function
> doesn't check the mode before propagating such changes to the lower device
> which can cause net_device->promiscuity counter overflow as illustrated by
> reproduction example [0] and resulting dmesg log [1]. Fix the issue by
> first verifying the mode in macvlan_change_rx_flags() function before
> propagating promiscuous mode change to the lower device.
> [...]

Here is the summary with links:
  - [net] macvlan: Don't propagate promisc change to lower dev in passthru

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