linux-kernel - Re: [PATCH net-next v4 3/7] net: stmmac: refactor FPE verification process

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

Message-ID: <20240820125222.uia4m27wizy2767a@skbuf>
Date: Tue, 20 Aug 2024 15:52:22 +0300
From: Vladimir Oltean <olteanv@...il.com>
To: Furong Xu <0x1207@...il.com>
Cc: Serge Semin <fancer.lancer@...il.com>, Andrew Lunn <andrew@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jose Abreu <joabreu@...opsys.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Joao Pinto <jpinto@...opsys.com>, netdev@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	xfr@...look.com
Subject: Re: [PATCH net-next v4 3/7] net: stmmac: refactor FPE verification
 process

On Tue, Aug 20, 2024 at 03:34:56PM +0300, Vladimir Oltean wrote:
> I took the liberty of rewriting the fpe_task to a timer, and delete the
> workqueue. Here is a completely untested patch, which at least is less
> complex, has less code and is easier to understand. What do you think?

I already found a bug in the code I sent, sorry. verify_limit needs to
be reset each time status is reset to ETHTOOL_MM_VERIFY_STATUS_INITIAL,
to allow for 3 retries on each clean-state verification process.

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index 3eb5344e2412..530793bce231 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -1333,7 +1333,6 @@ static int stmmac_set_mm(struct net_device *ndev, struct ethtool_mm_cfg *cfg,
 	fpe_cfg->tx_enabled = cfg->tx_enabled;
 	fpe_cfg->verify_time = cfg->verify_time;
 	fpe_cfg->verify_enabled = cfg->verify_enabled;
-	fpe_cfg->verify_limit = 3; /* IEEE 802.3 constant */
 	if (!cfg->verify_enabled)
 		fpe_cfg->status = ETHTOOL_MM_VERIFY_STATUS_DISABLED;
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index fa74504f3ad5..a88ec40c4b6d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7405,6 +7405,7 @@ void stmmac_fpe_apply(struct stmmac_priv *priv)
 				     fpe_cfg->pmac_enabled);
 	} else {
 		fpe_cfg->status = ETHTOOL_MM_VERIFY_STATUS_INITIAL;
+		fpe_cfg->verify_limit = 3; /* IEEE 802.3 constant */
 		stmmac_fpe_verify_timer_arm(fpe_cfg);
 	}
 }