netdev - [PATCH net-next] net: mvpp2: Increase size of queue

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Message-Id: <20240806-mvpp2-namelen-v1-1-6dc773653f2f@kernel.org>
Date: Tue, 06 Aug 2024 12:28:24 +0100
From: Simon Horman <horms@...nel.org>
To: Marcin Wojtas <marcin.s.wojtas@...il.com>, 
 Russell King <linux@...linux.org.uk>
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
Subject: [PATCH net-next] net: mvpp2: Increase size of queue_name buffer

Increase size of queue_name buffer from 30 to 31 to accommodate
the largest string written to it. This avoids truncation in
the possibly unlikely case where the string is name is the
maximum size.

Flagged by gcc-14:

  .../mvpp2_main.c: In function 'mvpp2_probe':
  .../mvpp2_main.c:7636:32: warning: 'snprintf' output may be truncated before the last format character [-Wformat-truncation=]
   7636 |                  "stats-wq-%s%s", netdev_name(priv->port_list[0]->dev),
        |                                ^
  .../mvpp2_main.c:7635:9: note: 'snprintf' output between 10 and 31 bytes into a destination of size 30
   7635 |         snprintf(priv->queue_name, sizeof(priv->queue_name),
        |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   7636 |                  "stats-wq-%s%s", netdev_name(priv->port_list[0]->dev),
        |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   7637 |                  priv->port_count > 1 ? "+" : "");
        |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Introduced by commit 118d6298f6f0 ("net: mvpp2: add ethtool GOP statistics").
I am not flagging this as a bug as I am not aware that it is one.

Compile tested only.

Signed-off-by: Simon Horman <horms@...nel.org>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index e809f91c08fb..9e02e4367bec 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -1088,7 +1088,7 @@ struct mvpp2 {
 	unsigned int max_port_rxqs;

 	/* Workqueue to gather hardware statistics */
-	char queue_name[30];
+	char queue_name[31];
 	struct workqueue_struct *stats_queue;

 	/* Debugfs root entry */