net/mlx5: Fix incorrect raw command length parsing

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@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
index 487388aed98f22cc9ae814fd60d27b48d5105458..2db5fe571594db48543ca6a55b26c5d0eecb2719 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
@@ -1276,7 +1276,7 @@ static ssize_t outlen_write(struct file *filp, const char __user *buf,
 {
        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;
@@ -1291,8 +1291,6 @@ static ssize_t outlen_write(struct file *filp, const char __user *buf,
        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;