Group creation logic must use new group flag when allocating resources so that the privileges on the resource are set correctly

1 files changed, 106 insertions, 0 deletions

diff --git a/nuttx/sched/group/group_malloc.c b/nuttx/sched/group/group_malloc.c
new file mode 100644
index 000000000..d00b5c2c0
--- /dev/null
+++ b/nuttx/sched/group/group_malloc.c
@@ -0,0 +1,106 @@
+/************************************************************************
+ * sched/group/group_malloc.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************/
+
+/************************************************************************
+ * Included Files
+ ************************************************************************/
+
+#include <sys/types.h>
+
+#include <nuttx/sched.h>
+#include <nuttx/kmalloc.h>
+
+#include "group/group.h"
+
+#if (defined(CONFIG_BUILD_PROTECTED) || defined(CONFIG_BUILD_KERNEL)) && \
+     defined(CONFIG_MM_KERNEL_HEAP)
+
+/************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************/
+
+/************************************************************************
+ * Private Type Declarations
+ ************************************************************************/
+
+/************************************************************************
+ * Global Variables
+ ************************************************************************/
+
+/************************************************************************
+ * Private Variables
+ ************************************************************************/
+
+/************************************************************************
+ * Private Function Prototypes
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Name: group_malloc
+ *
+ * Description:
+ *   Allocate memory appropriate for the group type.  If the memory is
+ *   part of a privileged, then it should be allocated so that it is
+ *   only accessed by privileged code;  Otherwise, it is a user mode
+ *   group and must be allocated so that it accessible by unprivileged
+ *   code.
+ *
+ ************************************************************************/
+
+FAR void *group_malloc(FAR struct task_group_s *group, size_t nbytes)
+{
+  /* Check the group type */
+
+  if ((group->tg_flags & GROUP_FLAG_PRIVILEGED) != 0)
+    {
+      /* It is a privileged group... use the kernel mode memory allocator */
+
+      return kmm_malloc(nbytes);
+    }
+  else
+    {
+      /* This is an unprivileged group... use the user mode memory
+       * allocator.
+       */
+
+      return kumm_malloc(nbytes);
+    }
+}
+
+#endif  /* CONFIG_BUILD_PROTECTED || CONFIG_BUILD_KERNEL) && CONFIG_MM_KERNEL_HEAP */