On 02/21, [email protected] wrote: > > In PT_SEIZED + LISTEN mode SIGSTOP/SIGCONT signals cause a wakeup > against __TASK_TRACED. If this races with the ptrace_unfreeze_traced at > the end of a PTRACE_LISTEN, this can wake the task /after/ the check > against __TASK_TRACED, but before the reset of state to TASK_TRACED.
Oh, thanks... note also that PTRACE_LISTEN itself can do ptrace_signal_wake_up(true), > This causes it to instead clobber TASK_WAKING, even if it is already TASK_RUNNING it is simply wrong to set TASK_TRACED in both cases, right? Thanks. The patch looks good at first glance, but let me think a bit... perhaps we should change PTRACE_LISTEN instead, not sure. Oleg.
