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Message-Id: <20180720121340.705978361@linuxfoundation.org>
Date: Fri, 20 Jul 2018 14:13:45 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Alex Vesker <valex@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>
Subject: [PATCH 4.4 15/31] net/mlx5: Fix incorrect raw command length parsing
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alex Vesker <valex@...lanox.com>
[ Upstream commit 603b7bcff824740500ddfa001d7a7168b0b38542 ]
The NULL character was not set correctly for the string containing
the command length, this caused failures reading the output of the
command due to a random length. The fix is to initialize the output
length string.
Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters")
Signed-off-by: Alex Vesker <valex@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
@@ -1126,7 +1126,7 @@ static ssize_t outlen_write(struct file
{
struct mlx5_core_dev *dev = filp->private_data;
struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
- char outlen_str[8];
+ char outlen_str[8] = {0};
int outlen;
void *ptr;
int err;
@@ -1141,8 +1141,6 @@ static ssize_t outlen_write(struct file
if (copy_from_user(outlen_str, buf, count))
return -EFAULT;
- outlen_str[7] = 0;
-
err = sscanf(outlen_str, "%d", &outlen);
if (err < 0)
return err;
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