freezer: prevent new tasks from inheriting TIF_FREEZE set

Tasks should go to the refrigerator only if explicitly requested to do that by
the freezer and not as a result of inheriting the TIF_FREEZE flag set from the
parent.  Make it happen.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 490495a39c7e..7e455a93a75a 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -942,6 +942,7 @@ static inline void copy_flags(unsigned long clone_flags, struct task_struct *p)
         if (!(clone_flags & CLONE_PTRACE))
                 p->ptrace = 0;
         p->flags = new_flags;
+        clear_freeze_flag(p);
 }
 
 asmlinkage long sys_set_tid_address(int __user *tidptr)