4.17-stable review patch. If anyone has any objections, please let me know.
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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;