futex: fixup get_futex_key() for private futexes
Peter Zijlstra [Tue, 30 Sep 2008 10:33:07 +0000 (12:33 +0200)]
With the get_user_pages_fast() patches we made get_futex_key() obtain a
reference on the returned key, but failed to do so for private futexes.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

kernel/futex.c

index 60b47bb..62cbd64 100644 (file)
@@ -227,6 +227,7 @@ static int get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key)
                        return -EFAULT;
                key->private.mm = mm;
                key->private.address = address;
+               get_futex_key_refs(key);
                return 0;
        }