linux-kernel - [PATCH iwl-next] i40e: Use correct buffer size

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Message-Id: <20231115031444.33381-1-chentao@kylinos.cn>
Date:   Wed, 15 Nov 2023 11:14:44 +0800
From:   Kunwu Chan <chentao@...inos.cn>
To:     horms@...nel.org
Cc:     anthony.l.nguyen@...el.com, chentao@...inos.cn,
        davem@...emloft.net, edumazet@...gle.com,
        intel-wired-lan@...ts.osuosl.org, jeffrey.t.kirsher@...el.com,
        jesse.brandeburg@...el.com, kuba@...nel.org,
        kunwu.chan@...mail.com, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, pabeni@...hat.com, shannon.nelson@....com
Subject: [PATCH iwl-next] i40e: Use correct buffer size

The size of "i40e_dbg_command_buf" is 256, the size of "name"
depends on "IFNAMSIZ", plus a null character and format size,
the total size is more than 256, fix it.

Signed-off-by: Kunwu Chan <chentao@...inos.cn>
Suggested-by: Simon Horman <horms@...nel.org>
---
 drivers/net/ethernet/intel/i40e/i40e_debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
index 999c9708def5..e3b939c67cfe 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
@@ -72,7 +72,7 @@ static ssize_t i40e_dbg_command_read(struct file *filp, char __user *buffer,
 {
 	struct i40e_pf *pf = filp->private_data;
 	int bytes_not_copied;
-	int buf_size = 256;
+	int buf_size = IFNAMSIZ + sizeof(i40e_dbg_command_buf) + 4;
 	char *buf;
 	int len;
 
-- 
2.34.1