linux-kernel - Re: [PATCH net] net: validate SO_TXTIME clockid coming from userspace

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Date: Tue, 28 May 2024 20:32:05 -0700
From: "Abhishek Chauhan (ABC)" <quic_abchauha@...cinc.com>
To: Martin KaFai Lau <martin.lau@...ux.dev>
CC: "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni
	<pabeni@...hat.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Andrew Halaney <ahalaney@...hat.com>,
        "Willem
 de Bruijn" <willemdebruijn.kernel@...il.com>,
        Martin KaFai Lau
	<martin.lau@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>, bpf
	<bpf@...r.kernel.org>,
        <kernel@...cinc.com>,
        <syzbot+d7b227731ec589e7f4f0@...kaller.appspotmail.com>,
        <syzbot+30a35a2e9c5067cc43fa@...kaller.appspotmail.com>
Subject: Re: [PATCH net] net: validate SO_TXTIME clockid coming from userspace



On 5/28/2024 6:15 PM, Martin KaFai Lau wrote:
> On 5/28/24 3:49 PM, Abhishek Chauhan wrote:
>> Currently there are no strict checks while setting SO_TXTIME
>> from userspace. With the recent development in skb->tstamp_type
>> clockid with unsupported clocks results in warn_on_once, which causes
>> unnecessary aborts in some systems which enables panic on warns.
>>
>> Add validation in setsockopt to support only CLOCK_REALTIME,
>> CLOCK_MONOTONIC and CLOCK_TAI to be set from userspace.
>>
>> Link: https://lore.kernel.org/netdev/bc037db4-58bb-4861-ac31-a361a93841d3@linux.dev/
>> Link: https://lore.kernel.org/lkml/20240509211834.3235191-1-quic_abchauha@quicinc.com/
>> Fixes: 1693c5db6ab8 ("net: Add additional bit to support clockid_t timestamp type")
> 
> Patch lgtm. This should target for net-next instead of net. The Fixes patch is in net-next only.
> 
Thanks Martin. Let me raise a patch on net-next and add your acked-by to it as well. 

> Acked-by: Martin KaFai Lau <martin.lau@...nel.org>
>