Messages in this thread |  | | Date | Mon, 16 Jun 2008 18:20:16 +0400 | From | Oleg Nesterov <> | Subject | [PATCH 0/3] resend, ptrace && SIGKILL fixes |
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On 06/10, Oleg Nesterov wrote: > > These 2 patches don't depend on each other. Each change is user visible, > and I am not really sure it can't confuse debuggers/etc. The explicit > ack/nack from maintainers is wanted.
I'm mostly worried about do_exit()->ptrace_notify(), with these patches we never notify the tracer if the tracee was SIGKILL'ed. The current behaviour depends on arch_ptrace_stop_needed(), this is not good either.
Anyway, I think these patches are fixes. Suppose we send SIGKILL to the traced task which does ptrace_notify(). If the signal is delivered before ptrace_notify() takes ->siglock, the tracee sleeps in TASK_TRACED state and becomes "unkillable". If ptrace_notify() wins, we kill the tracee. This can't be good.
The 3rd patch is new.
Oleg.
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