netdev - Re: [PATCH iproute2] lib/libnetlink: ensure a minimum of 32KB for the buffer used in rtnl

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <020bbca0-46d9-205e-0367-b14f4b0cc086@nvidia.com>
Date: Mon, 5 Jun 2023 10:24:12 +0300
From: Gal Pressman <gal@...dia.com>
To: David Ahern <dsahern@...il.com>,
 Stephen Hemminger <stephen@...workplumber.org>
Cc: Eric Dumazet <edumazet@...gle.com>, netdev <netdev@...r.kernel.org>,
 Eric Dumazet <eric.dumazet@...il.com>, Hangbin Liu <liuhangbin@...il.com>,
 Phil Sutter <phil@....cc>, Jakub Kicinski <kuba@...nel.org>,
 Michal Kubecek <mkubecek@...e.cz>
Subject: Re: [PATCH iproute2] lib/libnetlink: ensure a minimum of 32KB for the
 buffer used in rtnl_recvmsg()

On 04/06/2023 19:03, David Ahern wrote:
> On 6/4/23 7:33 AM, Gal Pressman wrote:
>>> It is possible to dump millions of routes, so it is not directly a netlink
>>> issue more that the current API is slamming all the VF's as info blocks
>>> under a single message response.
>>>
>>> That would mean replacing IFLA_VFINFO_LIST with a separate query
>>
>> Thanks Stephen!
>> How would you imagine it? Changing the userspace to split each (PF, VF)
>> to a separate netlink call instead of a single call for each PF?
> 
> 
> This is the last attempt that I recall to address this issue:
> 
> https://lore.kernel.org/netdev/20210123045321.2797360-1-edwin.peer@broadcom.com/

Thanks for the pointer David, this is helpful.