diff -Naur psmisc-22.20.orig/src/pstree.c psmisc-22.20/src/pstree.c

--- psmisc-22.20.orig/src/pstree.c	2013-10-21 15:31:15.000000000 +0200

+++ psmisc-22.20/src/pstree.c	2013-10-21 15:30:58.000000000 +0200

@@ -222,7 +222,12 @@

     }

     if (!ptr) {

-        ptr = malloc(sizeof(*ptr));

+

+        if (!(ptr = malloc(sizeof(*ptr)))) {

+            perror("malloc");

+            exit(1);

+        }

+

         memset(ptr, 0, sizeof(*ptr));

         ptr->number = r->ns[id];

         if (*root == NULL)

@@ -234,7 +239,12 @@

     /* move the child to under the namespace's umbrella */

     for (c = &ptr->children; *c; c = &(*c)->next)

         ;

-    *c = malloc(sizeof(CHILD));

+

+    if (!(*c = malloc(sizeof(CHILD)))) {

+        perror("malloc");

+        exit(1);

+    }

+

     (*c)->child = r;

     (*c)->next = NULL;