diff options
| -rw-r--r-- | kernel/futex.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/kernel/futex.c b/kernel/futex.c index c3ea6f2a6997..053d7be08be5 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -1467,8 +1467,16 @@ static int futex_atomic_op_inuser(unsigned int encoded_op, u32 __user *uaddr) int oldval, ret; if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) { - if (oparg < 0 || oparg > 31) - return -EINVAL; + if (oparg < 0 || oparg > 31) { + char comm[sizeof(current->comm)]; + /* + * kill this print and return -EINVAL when userspace + * is sane again + */ + pr_info_ratelimited("futex_wake_op: %s tries to shift op by %d; fix this program\n", + get_task_comm(comm, current), oparg); + oparg &= 31; + } oparg = 1 << oparg; } |