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Ticket #8739: Segfault during DVB-S scanning

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mythtv at cvs

Aug 5, 2010, 8:49 PM

Post #1 of 6 (191 views)
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Ticket #8739: Segfault during DVB-S scanning

#8739: Segfault during DVB-S scanning
---------------------------------------------------------------------+------
Reporter: Nick Morrott <knowledgejunkie (at) gmail (dot) com> | Owner: danielk
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - Channel Scanner | Version: Trunk Head
Severity: medium | Keywords: channel scanner dvb-s segfault
Ticket locked: 0 |
---------------------------------------------------------------------+------
Using the same configuration as reported in #8726.

Testing DVB-S scanning has highlighted a repeatable segfault when
decryption testing is enabled. Repeated testing with decryption testing
disabled does not seem to provoke this segfault. This card is not using a
CAM.

Testing was carried out using tuned scans (10714000/22000000) using the
Astra2 cluster for UK Freesat/FTA channels.

The last output seen in the scan window was "Unknown decryption status".

Backtrace attached.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/8739>
MythTV <http://www.mythtv.org/>
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mythtv at cvs

Aug 5, 2010, 9:06 PM

Post #2 of 6 (188 views)
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Re: Ticket #8739: Segfault during DVB-S scanning [In reply to]

#8739: Segfault during DVB-S scanning
-----------------------------------------------------------------+----------
Reporter: Nick Morrott <knowledgejunkie (at) gmail (dot) com> | Owner: danielk
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - Channel Scanner | Version: Trunk Head
Severity: medium | Resolution:
Keywords: channel scanner dvb-s segfault | Ticket locked: 0
-----------------------------------------------------------------+----------

Comment (by robertm):

Almost definitely a dupe of #8737.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/8739#comment:1>
MythTV <http://www.mythtv.org/>
MythTV
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mythtv at cvs

Aug 5, 2010, 9:16 PM

Post #3 of 6 (189 views)
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Re: Ticket #8739: Segfault during DVB-S scanning [In reply to]

#8739: Segfault during DVB-S scanning
-----------------------------------------------------------------+----------
Reporter: Nick Morrott <knowledgejunkie (at) gmail (dot) com> | Owner: danielk
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - Channel Scanner | Version: Trunk Head
Severity: medium | Resolution:
Keywords: channel scanner dvb-s segfault | Ticket locked: 0
-----------------------------------------------------------------+----------

Comment (by Nick Morrott <knowledgejunkie (at) gmail (dot) com>):

I was wondering that myself, but don't know enough about the various
flavours of DVB scanning to be sure.

I'm testing the patch posted earlier on #8737 to see if this fixes the
issue. Apologies I didn't notice the patch before opening the ticket.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/8739#comment:2>
MythTV <http://www.mythtv.org/>
MythTV
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mythtv at cvs

Aug 5, 2010, 9:20 PM

Post #4 of 6 (188 views)
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Re: Ticket #8739: Segfault during DVB-S scanning [In reply to]

#8739: Segfault during DVB-S scanning
-----------------------------------------------------------------+----------
Reporter: Nick Morrott <knowledgejunkie (at) gmail (dot) com> | Owner: danielk
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - Channel Scanner | Version: Trunk Head
Severity: medium | Resolution:
Keywords: channel scanner dvb-s segfault | Ticket locked: 0
-----------------------------------------------------------------+----------

Comment (by Nick Morrott <knowledgejunkie (at) gmail (dot) com>):

It seems it might be the same/similar as the DVB-C scanning bug reported
on #7340 last year. I didn't see any segfault earlier when testing DVB-T
scanning.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/8739#comment:3>
MythTV <http://www.mythtv.org/>
MythTV
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mythtv at cvs

Aug 5, 2010, 10:39 PM

Post #5 of 6 (184 views)
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Re: Ticket #8739: Segfault during DVB-S scanning [In reply to]

#8739: Segfault during DVB-S scanning
-----------------------------------------------------------------+----------
Reporter: Nick Morrott <knowledgejunkie (at) gmail (dot) com> | Owner: danielk
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - Channel Scanner | Version: Trunk Head
Severity: medium | Resolution:
Keywords: channel scanner dvb-s segfault | Ticket locked: 0
-----------------------------------------------------------------+----------

Comment (by Nick Morrott <knowledgejunkie (at) gmail (dot) com>):

I've now tested the patch attached to #8737 and have seen no segfaults
after 2 lengthy tuned scans (same settings as above) with decryption
testing enabled.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/8739#comment:4>
MythTV <http://www.mythtv.org/>
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mythtv at cvs

Aug 5, 2010, 10:41 PM

Post #6 of 6 (181 views)
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Re: Ticket #8739: Segfault during DVB-S scanning [In reply to]

#8739: Segfault during DVB-S scanning
-----------------------------------------------------------------+----------
Reporter: Nick Morrott <knowledgejunkie (at) gmail (dot) com> | Owner: danielk
Type: defect | Status: closed
Priority: minor | Milestone: unknown
Component: MythTV - Channel Scanner | Version: Trunk Head
Severity: medium | Resolution: duplicate
Keywords: channel scanner dvb-s segfault | Ticket locked: 0
-----------------------------------------------------------------+----------
Changes (by robertm):

* status: new => closed
* resolution: => duplicate

Comment:

Dupe of #8737, thank you for the patch test.

--
Ticket URL: <http://svn.mythtv.org/trac/ticket/8739#comment:5>
MythTV <http://www.mythtv.org/>
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