From: patchwork-bot+netdevbpf@kernel.org
To: Xiang Mei <xmei5@asu.edu>
Cc: security@kernel.org, netdev@vger.kernel.org, pabeni@redhat.com,
jhs@mojatatu.com, jiri@resnulli.us, davem@davemloft.net,
edumazet@google.com, kuba@kernel.org, horms@kernel.org,
bestswngs@gmail.com
Subject: Re: [PATCH net v3 1/2] net/sched: sch_hfsc: fix divide-by-zero in rtsc_min()
Date: Sat, 28 Mar 2026 03:50:06 +0000 [thread overview]
Message-ID: <177466980654.4171339.9896790329642244763.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260326204310.1549327-1-xmei5@asu.edu>
Hello:
This series was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:
On Thu, 26 Mar 2026 13:43:09 -0700 you wrote:
> m2sm() converts a u32 slope to a u64 scaled value. For large inputs
> (e.g. m1=4000000000), the result can reach 2^32. rtsc_min() stores
> the difference of two such u64 values in a u32 variable `dsm` and
> uses it as a divisor. When the difference is exactly 2^32 the
> truncation yields zero, causing a divide-by-zero oops in the
> concave-curve intersection path:
>
> [...]
Here is the summary with links:
- [net,v3,1/2] net/sched: sch_hfsc: fix divide-by-zero in rtsc_min()
https://git.kernel.org/netdev/net/c/4576100b8cd0
- [net,v3,2/2] selftests/tc-testing: add test for HFSC divide-by-zero in rtsc_min()
https://git.kernel.org/netdev/net/c/5d17af9eb2dd
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
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prev parent reply other threads:[~2026-03-28 3:50 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-26 20:43 [PATCH net v3 1/2] net/sched: sch_hfsc: fix divide-by-zero in rtsc_min() Xiang Mei
2026-03-26 20:43 ` [PATCH net v3 2/2] selftests/tc-testing: add test for HFSC " Xiang Mei
2026-03-27 14:02 ` Jamal Hadi Salim
2026-03-27 14:03 ` Victor Nogueira
2026-03-27 14:01 ` [PATCH net v3 1/2] net/sched: sch_hfsc: fix " Jamal Hadi Salim
2026-03-28 3:50 ` patchwork-bot+netdevbpf [this message]
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