futex: fixup get_futex_key() for private futexes

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 <[email protected]>
Acked-by: Nick Piggin <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/kernel/futex.c b/kernel/futex.c
index 60b47bb9e3dd39a9d20f62aea45aa3508ac99d18..62cbd648e28a663fc5e165adf177d227bed38a33 100644 (file)
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -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;
        }