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    Subject[PATCH 4.17 023/101] net/mlx5: Fix incorrect raw command length parsing
    Date
    4.17-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Alex Vesker <valex@mellanox.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@mellanox.com>
    Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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
    @@ -1276,7 +1276,7 @@ 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;
    @@ -1291,8 +1291,6 @@ 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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