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Differential D58395

kqueue: Fix delivery of unwanted events
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Authored by des on Wed, Jul 22, 3:11 PM.
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kib
markj
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rG4627fe9e5afc: kqueue: Fix delivery of unwanted events
Summary

In both procdesc_kqops_event() and filt_proc(), the event variable can
have more than one bit set. This means that:

  • We cannot compare it directly with NOTE_EXIT; we must binary-and them instead.
  • We cannot binary-or it with the report mask; we must binary-and it with the request mask first.

MFC after: 1 week
Fixes: 2a5e58c59694 ("procdesc: add NOTE_PDSIGCHLD")
Fixes: b328975b9d7c ("procdesc: report NOTE_PDSIGCHLD for traced and stopped process")

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rG FreeBSD src repository
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sys/
kern/
6 lines
4 lines

Diff 182491

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sys/kern/kern_event.c

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sys/kern/sys_procdesc.c

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