Re: [PATCH net v3] ipv6: reject wrapped temporary address preferred lifetimes

[patchwork-bot+netdevbpf]

Hello:

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

On Fri, 30 Oct 2026 15:30:56 +0800 you wrote:
> ipv6_create_tempaddr() raises a temporary address's preferred lifetime to
> regen_advance + age + 1 when the configured lifetime is too short. The
> result is stored in a u32, while regen_advance and age are unsigned long.
> If the sum wraps or is truncated, the stored lifetime can still be less
> than or equal to regen_advance + age.
> 
> addrconf_verify_rtnl() then sees the new address as due for regeneration
> and creates another one. Temporary addresses are not limited by
> max_addresses since commit 4b08a8f1bd8c ("ipv6: remove max_addresses
> check from ipv6_create_tempaddr"), so this can cause unbounded address
> growth. With dad_transmits set to -1, a baseline kernel reached 2859
> loopback addresses in two seconds.
> 
> [...]

Here is the summary with links:
  - [net,v3] ipv6: reject wrapped temporary address preferred lifetimes
    https://git.kernel.org/netdev/net/c/c3e67bd82b9b

You are awesome, thank you!
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