Re: 'khelper' (child) is stuck in endless loop: do_signal() and!user_mode(regs)

[Oleg Nesterov]

On 03/08, Dmitry ADAMUSHKA (EXT) wrote:
>
> And to simplify a real-life test case: it's enough for khelper's child task,
> while it's running in ____call_usermodehelper(), to receive SIGKILL.
> In this case, do_execve_common() will fail - there are a number of
> fatal_signal_pending(current) checks in there.

Actually there is no difference, SIGUSR1 equally kills the task and
makes fatal_signal_pending() true. The handler is SIG_DFL after
flush_signal_handlers(), complete_signal() adds SIGKILL implicitely.

Not that this actually matters.

Oleg.

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