linux-kernel - Re: BUG: UDP Packet Corruption Issue with stmmac Driver on Linux 5.15.21-rt30

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Message-ID: <Z40WnTc09OOnCZ3p@shell.armlinux.org.uk>
Date: Sun, 19 Jan 2025 15:13:33 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: "Oleksandr Makarov [GL]" <Oleksandr.Makarov@....com>
Cc: Eric Dumazet <edumazet@...gle.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jose Abreu <joabreu@...opsys.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-stm32@...md-mailman.stormreply.com" <linux-stm32@...md-mailman.stormreply.com>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: BUG: UDP Packet Corruption Issue with stmmac Driver on Linux
 5.15.21-rt30

On Sun, Jan 19, 2025 at 12:46:54PM +0000, Oleksandr Makarov [GL] wrote:
> I bisected kernel from 6.12, where the issue with trimming fragmented UDP packets was fixed, down to 5.15.21.
> 
> I have identified that commit  "47f753c1108e287edb3e27fad8a7511a9d55578e net: stmmac: disable Split Header (SPH) for Intel platforms" is fixing the problem.

It sounds like you're saying that it's been fixed on mainline, but the
fix hasn't been backported to 5.15.21. Well, it won't ever be. 5.15.21
is one instance of the 5.15-stable kernel tree, and the 5.15-stable
tree is now at 5.15.176.

Try moving your stable kernel forward. If you're locked in to 5.15.21
by an upstream vendor, then you need to complain to them.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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