netdev - Re: [PATCH v3 net] net/sched: taprio: enforce minimum value for picos_per

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Message-Id: 
 <175409461025.4171186.11925448552311801964.git-patchwork-notify@kernel.org>
Date: Sat, 02 Aug 2025 00:30:10 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Takamitsu Iwai <takamitz@...zon.co.jp>
Cc: vinicius.gomes@...el.com, jhs@...atatu.com, xiyou.wangcong@...il.com,
 jiri@...nulli.us, netdev@...r.kernel.org, kuniyu@...gle.com,
 davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
 horms@...nel.org, olteanv@...il.com, takamitz@...zon.com,
 syzbot+398e1ee4ca2cac05fddb@...kaller.appspotmail.com
Subject: Re: [PATCH v3 net] net/sched: taprio: enforce minimum value for
 picos_per_byte

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Tue, 29 Jul 2025 02:31:49 +0900 you wrote:
> Syzbot reported a WARNING in taprio_get_start_time().
> 
> When link speed is 470,589 or greater, q->picos_per_byte becomes too
> small, causing length_to_duration(q, ETH_ZLEN) to return zero.
> 
> This zero value leads to validation failures in fill_sched_entry() and
> parse_taprio_schedule(), allowing arbitrary values to be assigned to
> entry->interval and cycle_time. As a result, sched->cycle can become zero.
> 
> [...]

Here is the summary with links:
  - [v3,net] net/sched: taprio: enforce minimum value for picos_per_byte
    https://git.kernel.org/netdev/net/c/ae8508b25def

You are awesome, thank you!
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