netdev - Re: [PATCH net v2] ipv6/addrconf: fix a potential refcount underflow for idev

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Date: Sun, 09 Jul 2023 10:20:20 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Ziyang Xuan <william.xuanziyang@...wei.com>
Cc: davem@...emloft.net, dsahern@...nel.org, edumazet@...gle.com,
 kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org,
 hannes@...essinduktion.org, fbl@...hat.com
Subject: Re: [PATCH net v2] ipv6/addrconf: fix a potential refcount underflow for
 idev

Hello:

This patch was applied to netdev/net.git (main)
by David S. Miller <davem@...emloft.net>:

On Sat, 8 Jul 2023 14:59:10 +0800 you wrote:
> Now in addrconf_mod_rs_timer(), reference idev depends on whether
> rs_timer is not pending. Then modify rs_timer timeout.
> 
> There is a time gap in [1], during which if the pending rs_timer
> becomes not pending. It will miss to hold idev, but the rs_timer
> is activated. Thus rs_timer callback function addrconf_rs_timer()
> will be executed and put idev later without holding idev. A refcount
> underflow issue for idev can be caused by this.
> 
> [...]

Here is the summary with links:
  - [net,v2] ipv6/addrconf: fix a potential refcount underflow for idev
    https://git.kernel.org/netdev/net/c/06a0716949c2

You are awesome, thank you!
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