linux-kernel - Re: [PATCH net] netlink: avoid infinite retry looping in netlink

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Message-ID: <2ebf39be-aa26-4863-931b-a32fde9de182@1und1.de>
Date: Thu, 14 Aug 2025 16:14:39 +0200
From: Julian Taylor <julian.taylor@...d1.de>
To: Greg KH <gregkh@...uxfoundation.org>
CC: <patchwork-bot+netdevbpf@...nel.org>, Fedor Pchelkin <pchelkin@...ras.ru>,
	<davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<kuniyu@...gle.com>, <edumazet@...gle.com>, <horms@...nel.org>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<lvc-project@...uxtesting.org>, <stable@...r.kernel.org>
Subject: Re: [PATCH net] netlink: avoid infinite retry looping in
 netlink_unicast()



On 14.08.25 15:57, Greg KH wrote:
> On Thu, Aug 14, 2025 at 02:51:27PM +0200, Julian Taylor wrote:
>>
>> On 31.07.25 04:30, patchwork-bot+netdevbpf@...nel.org wrote:
>>> Hello:
>>>
>>> This patch was applied to netdev/net.git (main)
>>> by Jakub Kicinski <kuba@...nel.org>:
>>>
>>> On Mon, 28 Jul 2025 11:06:47 +0300 you wrote:
>>>> netlink_attachskb() checks for the socket's read memory allocation
>>>> constraints. Firstly, it has:
>>>>
>>>>     rmem < READ_ONCE(sk->sk_rcvbuf)
>>>>
>>>> to check if the just increased rmem value fits into the socket's receive
>>>> buffer. If not, it proceeds and tries to wait for the memory under:
>>>>
>>>> [...]
>>>
>>> Here is the summary with links:
>>>     - [net] netlink: avoid infinite retry looping in netlink_unicast()
>>>       https://git.kernel.org/netdev/net/c/759dfc7d04ba
>>>
>>> You are awesome, thank you!
>>
>> hello,
>> as far as I can tell this patch has not made it to the 6.1 stable tree yet in the 6.1.148 review yet:
>> https://www.spinics.net/lists/stable/msg866199.html
> 
> Please use lore.kernel.org links.
> 
>> As this seems to be causing issues in distributions releasing 6.1.147 can this still be added to the next possible stable release?
>> See following issues in relation to loading audit rules which seems to trigger the fixed bug:
>> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1111017
>> https://github.com/amazonlinux/amazon-linux-2023/issues/988
>>
>> I have tested this patch solves the problem in the Debian bookworm using 6.1.x
> 
> What is the git commit id of this patch in Linus's tree?
> 


The commit id is 759dfc7d04bab1b0b86113f1164dc1fec192b859
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=759dfc7d04bab1b0b86113f1164dc1fec192b859