svn commit: r331918 - stable/11/sys/dev/mlx5/mlx5_core

[Hans Petter Selasky]

Author: hselasky
Date: Tue Apr  3 09:31:30 2018
New Revision: 331918
URL: https://svnweb.freebsd.org/changeset/base/331918

Log:
  MFC r331825:
  Fix for use after free in mlx5core.
  
  Make sure the command completion handler is not called when the device is
  in internal error state. This can easily trigger use after free situations.
  
  Sponsored by:	Mellanox Technologies

Modified:
  stable/11/sys/dev/mlx5/mlx5_core/mlx5_eq.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/dev/mlx5/mlx5_core/mlx5_eq.c
==============================================================================
--- stable/11/sys/dev/mlx5/mlx5_core/mlx5_eq.c	Tue Apr  3 09:30:40 2018	(r331917)
+++ stable/11/sys/dev/mlx5/mlx5_core/mlx5_eq.c	Tue Apr  3 09:31:30 2018	(r331918)
@@ -254,7 +254,8 @@ static int mlx5_eq_int(struct mlx5_core_dev *dev, stru
 			break;
 
 		case MLX5_EVENT_TYPE_CMD:
-			mlx5_cmd_comp_handler(dev, be32_to_cpu(eqe->data.cmd.vector));
+			if (dev->state != MLX5_DEVICE_STATE_INTERNAL_ERROR)
+				mlx5_cmd_comp_handler(dev, be32_to_cpu(eqe->data.cmd.vector));
 			break;
 
 		case MLX5_EVENT_TYPE_PORT_CHANGE: