1 files changed, 33 insertions, 12 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index ffccdad050b5..a781dec1cd0b 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -128,6 +128,7 @@ struct bio_list;
 struct fs_struct;
 struct perf_event_context;
 struct blk_plug;
+struct filename;
 
 /*
  * List of flags we want to share for kernel threads,
@@ -229,7 +230,7 @@ extern char ___assert_task_state[1 - 2*!!(
 /* get_task_state() */
 #define TASK_REPORT             (TASK_RUNNING | TASK_INTERRUPTIBLE | \
                                  TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \
-                                 __TASK_TRACED)
+                                 __TASK_TRACED | EXIT_ZOMBIE | EXIT_DEAD)
 
 #define task_is_traced(task)    ((task->state & __TASK_TRACED) != 0)
 #define task_is_stopped(task)   ((task->state & __TASK_STOPPED) != 0)
@@ -391,22 +392,33 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
 static inline void arch_pick_mmap_layout(struct mm_struct *mm) {}
 #endif
 
-
-extern void set_dumpable(struct mm_struct *mm, int value);
-extern int get_dumpable(struct mm_struct *mm);
-
 #define SUID_DUMP_DISABLE       0       /* No setuid dumping */
 #define SUID_DUMP_USER          1       /* Dump as user of process */
 #define SUID_DUMP_ROOT          2       /* Dump as root */
 
 /* mm flags */
-/* dumpable bits */
-#define MMF_DUMPABLE      0  /* core dump is permitted */
-#define MMF_DUMP_SECURELY 1  /* core file is readable only by root */
 
+/* for SUID_DUMP_* above */
 #define MMF_DUMPABLE_BITS 2
 #define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)
 
+extern void set_dumpable(struct mm_struct *mm, int value);
+/*
+ * This returns the actual value of the suid_dumpable flag. For things
+ * that are using this for checking for privilege transitions, it must
+ * test against SUID_DUMP_USER rather than treating it as a boolean
+ * value.
+ */
+static inline int __get_dumpable(unsigned long mm_flags)
+{
+        return mm_flags & MMF_DUMPABLE_MASK;
+}
+
+static inline int get_dumpable(struct mm_struct *mm)
+{
+        return __get_dumpable(mm->flags);
+}
+
 /* coredump filter bits */
 #define MMF_DUMP_ANON_PRIVATE   2
 #define MMF_DUMP_ANON_SHARED    3
@@ -549,6 +561,7 @@ struct signal_struct {
         atomic_t                sigcnt;
         atomic_t                live;
         int                     nr_threads;
+        struct list_head        thread_head;
 
         wait_queue_head_t       wait_chldexit;  /* for wait4() */
 
@@ -1227,7 +1240,6 @@ struct task_struct {
         /* Used for emulating ABI behavior of previous Linux versions */
         unsigned int personality;
 
-        unsigned did_exec:1;
         unsigned in_execve:1;   /* Tell the LSMs that the process is doing an
                                  * execve */
         unsigned in_iowait:1;
@@ -1271,6 +1283,7 @@ struct task_struct {
         /* PID/PID hash table linkage. */
         struct pid_link pids[PIDTYPE_MAX];
         struct list_head thread_group;
+        struct list_head thread_node;
 
         struct completion *vfork_done;          /* for vfork() */
         int __user *set_child_tid;              /* CLONE_CHILD_SETTID */
@@ -2282,8 +2295,6 @@ extern struct mm_struct *get_task_mm(struct task_struct *task);
 extern struct mm_struct *mm_access(struct task_struct *task, unsigned int mode);
 /* Remove the current tasks stale references to the old mm_struct */
 extern void mm_release(struct task_struct *, struct mm_struct *);
-/* Allocate a new mm structure and copy contents from tsk->mm */
-extern struct mm_struct *dup_mm(struct task_struct *tsk);
 
 extern int copy_thread(unsigned long, unsigned long, unsigned long,
                         struct task_struct *);
@@ -2301,7 +2312,7 @@ extern void do_group_exit(int);
 extern int allow_signal(int);
 extern int disallow_signal(int);
 
-extern int do_execve(const char *,
+extern int do_execve(struct filename *,
                      const char __user * const __user *,
                      const char __user * const __user *);
 extern long do_fork(unsigned long, unsigned long, unsigned long, int __user *, int __user *);
@@ -2341,6 +2352,16 @@ extern bool current_is_single_threaded(void);
 #define while_each_thread(g, t) \
         while ((t = next_thread(t)) != g)
 
+#define __for_each_thread(signal, t)    \
+        list_for_each_entry_rcu(t, &(signal)->thread_head, thread_node)
+
+#define for_each_thread(p, t)           \
+        __for_each_thread((p)->signal, t)
+
+/* Careful: this is a double loop, 'break' won't work as expected. */
+#define for_each_process_thread(p, t)   \
+        for_each_process(p) for_each_thread(p, t)
+
 static inline int get_nr_threads(struct task_struct *tsk)
 {
         return tsk->signal->nr_threads;