Bug 226745 - unkillable processes in D and T states
unkillable processes in D and T states
Status: CLOSED CURRENTRELEASE
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel (Show other bugs)
5.0
All Linux
medium Severity medium
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Assigned To: Vitaly Mayatskikh
Brian Brock
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Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2007-02-01 08:45 EST by Alexey Dobriyan
Modified: 2008-01-09 11:42 EST (History)
1 user (show)

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Fixed In Version: RHEL5.0GA
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2008-01-09 11:42:30 EST
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
Parent in D-state, child is TASK_STOPPED (1.09 KB, text/plain)
2007-02-01 08:45 EST, Alexey Dobriyan
no flags Details

  None (edit)
Description Alexey Dobriyan 2007-02-01 08:45:25 EST
Version: 2.6.18-1.2747.el5

Is seems that fix 5ecfbae093f0c37311e89b29bfc0c9d586eace87 aka

    [PATCH] fix zap_thread's ptrace related problems
    
    1. The tracee can go from ptrace_stop() to do_signal_stop()
       after __ptrace_unlink(p).
    
    2. It is unsafe to __ptrace_unlink(p) while p->parent may wait
       for tasklist_lock in ptrace_detach().

somehow not working anymore.

Attached program will create unkillable processes, but won't do it
on 2.6.20-rc7.
Comment 1 Alexey Dobriyan 2007-02-01 08:45:25 EST
Created attachment 147098 [details]
Parent in D-state, child is TASK_STOPPED

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