Re: bug: dvbv5-scan segfaults

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1.14.2 and git tree build gives the same error
TS of entire transponder:
https://drive.google.com/file/d/1zHouZSlbPowyJY5tzT5ro0r4ciPURkbi/view?usp=sharing

Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>, 26 Ağu 2019 Pzt,
20:40 tarihinde şunu yazdı:
>
> Hi Olcay,
>
> Em Mon, 26 Aug 2019 19:59:17 +0300
> Olcay Korkmaz <olcay.mz@xxxxxxxxx> escreveu:
>
> > Hello,
> > dvbv5-scan segfaults when scanning transponders at Turksat-42.0E
> > (three of transponders are causing the error)
>
> Are you using the latest version of dvbv5-scan from the git tree?
>
> >
> > LANG=en_US.UTF-8 gdb -ex=r --args dvbv5-scan -l UNIVERSAL -S0 -v -o
> > Turksat.conf ./Turksat-42.0E
> > [Thread debugging using libthread_db enabled]
> > Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
> > Using LNBf UNIVERSAL
> >  Universal, Europe
> >  Freqs : 10800 to 11800 MHz, LO: 9750 MHz
> >  Freqs : 11600 to 12700 MHz, LO: 10600 MHz
> > using demux 'dvb0.demux0'
> > Device Montage Technology DS3000/TS2020 (/dev/dvb/adapter0/frontend0)
> > capabilities:
> >      CAN_2G_MODULATION
> >      CAN_FEC_1_2
> >      CAN_FEC_2_3
> >      CAN_FEC_3_4
> >      CAN_FEC_4_5
> >      CAN_FEC_5_6
> >      CAN_FEC_6_7
> >      CAN_FEC_7_8
> >      CAN_FEC_AUTO
> >      CAN_INVERSION_AUTO
> >      CAN_QPSK
> >      CAN_RECOVER
> > DVB API Version 5.11, Current v5 delivery system: DVBS
> > Supported delivery systems:
> >     [DVBS]
> >      DVBS2
> > Failed to guess country from the current locale setting.
> >
> > ERROR command BANDWIDTH_HZ (5) not found during retrieve
> > Cannot calc frequency shift. Either bandwidth/symbol-rate is unavailable (yet).
> > Scanning frequency #1 12346000
> > frequency: 12346,00 MHz, high_band: 1
> > SEC: set voltage to 18V
> > DiSEqC TONE: OFF
> > DiSEqC command: e0 10 38 f3
> > DiSEqC BURST: SEC_MINI_A
> > DiSEqC TONE: ON
> > L-Band frequency: 1746,00 MHz (offset = 10600,00 MHz)
> > FREQUENCY = 12346000
> > INVERSION = AUTO
> > SYMBOL_RATE = 9600000
> > INNER_FEC = 3/4
> > POLARIZATION = HORIZONTAL
> > DELIVERY_SYSTEM = DVBS
> > Got parameters for DVBS:
> > FREQUENCY = 12346000
> > INVERSION = AUTO
> > SYMBOL_RATE = 9600000
> > INNER_FEC = 3/4
> > POLARIZATION = HORIZONTAL
> > DELIVERY_SYSTEM = DVBS
> > Lock (0x1f) Signal= 37,86% C/N= 47,97% UCB= 31440 postBER= 0
> > dvb_read_sections: waiting for table ID 0x00, program ID 0x00
> > dvb_parse_section: received table 0x00, extension ID 0xa414, section 0/0
> > dvb_parse_section: table 0x00, extension ID 0xa414: done
> > PAT
> > | table_id 0x00
> > | section_length 25
> > | one 3
> > | zero 0
> > | syntax 1
> > | transport_stream_id 42004
> > | current_next 1
> > | version 14
> > | one2 3
> > | section_number 0
> > | last_section_number 0
> > |\ 4 program pids
> > | pid 0x0010: service 0x0000
> > | pid 0x0065: service 0x3264
> > | pid 0x012d: service 0x3265
> > | pid 0x0066: service 0x3269
> > Program #0 is network PID: 0x0010
> > Program #1 ID 0x0065, service ID 0x3264
> > dvb_read_sections: waiting for table ID 0x02, program ID 0x65
> > dvb_parse_section: received table 0x02, extension ID 0x3264, section 0/0
> > dvb_parse_section: table 0x02, extension ID 0x3264: done
> > PMT
> > | table_id 0x02
> > | section_length 112
> > | one 3
> > | zero 0
> > | syntax 1
> > | transport_stream_id 12900
> > | current_next 1
> > | version 7
> > | one2 3
> > | section_number 0
> > | last_section_number 0
> > |- pcr_pid 0b54
> > | reserved2 7
> > | descriptor length 11
> > | zero3 0
> > | reserved3 15
> > | 0x0c: multiplex_buffer_utilization_descriptor
> > | 80 b4 81 68 ...h
> > | 0x0e: maximum_bitrate_descriptor
> > | c0 3e a4 .>.
> > |\
> > |- stream 0x0b54: Video ISO/IEC 13818-2 (2)
> > | descriptor length 16
> > | 0x52: stream_identifier_descriptor
> > | 01 .
> > | 0x02: video_stream_descriptor
> > | 1a 48 5f .H_
> > | 0x06: ds_alignment_descriptor
> > | 02 .
> > | 0x0e: maximum_bitrate_descriptor
> > | c0 39 4e .9N
> > |- stream 0x0bb8: Audio ISO/IEC 13818-3 (4)
> > | descriptor length 17
> > | 0x52: stream_identifier_descriptor
> > | 02 .
> > | 0x0a: iso639_language_descriptor
> > | lang: tur (type: 0)
> > | 0x03: audio_stream_descriptor
> > | 67 g
> > | 0x0e: maximum_bitrate_descriptor
> > | c0 02 90 ...
> > |- stream 0x0c1c: Audio ISO/IEC 13818-3 (4)
> > | descriptor length 17
> > | 0x52: stream_identifier_descriptor
> > | 03 .
> > | 0x0a: iso639_language_descriptor
> > | lang: eng (type: 0)
> > | 0x03: audio_stream_descriptor
> > | 67 g
> > | 0x0e: maximum_bitrate_descriptor
> > | c0 01 49 ..I
> > |- stream 0x1779: ISO/IEC 13818-1 Private Sections (5)
> > | descriptor length 5
> > | 0x6f: application_signalling_descriptor
> > | 00 10 e0 ...
> > |- stream 0x1f48: ISO/IEC 13818-6 type C (c)
> > | descriptor length 8
> > | 0x52: stream_identifier_descriptor
> > | 2e .
> > | 0x0e: maximum_bitrate_descriptor
> > | c0 00 4b ..K
> > |_ 5 streams
> > Program #2 ID 0x012d, service ID 0x3265
> > dvb_read_sections: waiting for table ID 0x02, program ID 0x12d
> > dvb_parse_section: received table 0x02, extension ID 0x3265, section 0/0
> > dvb_parse_section: table 0x02, extension ID 0x3265: done
> > PMT
> > | table_id 0x02
> > | section_length 85
> > | one 3
> > | zero 0
> > | syntax 1
> > | transport_stream_id 12901
> > | current_next 1
> > | version 14
> > | one2 3
> > | section_number 0
> > | last_section_number 0
> > |- pcr_pid 0b55
> > | reserved2 7
> > | descriptor length 11
> > | zero3 0
> > | reserved3 15
> > | 0x0c: multiplex_buffer_utilization_descriptor
> > | 80 b4 81 68 ...h
> > | 0x0e: maximum_bitrate_descriptor
> > | c0 35 b9 .5.
> > |\
> > |- stream 0x0b55: Video ISO/IEC 13818-2 (2)
> > | descriptor length 16
> > | 0x52: stream_identifier_descriptor
> > | 01 .
> > | 0x02: video_stream_descriptor
> > | 1a 48 5f .H_
> > | 0x06: ds_alignment_descriptor
> > | 02 .
> > | 0x0e: maximum_bitrate_descriptor
> > | c0 32 52 .2R
> > |- stream 0x0bb9: Audio ISO/IEC 13818-3 (4)
> > | descriptor length 17
> > | 0x52: stream_identifier_descriptor
> > | 02 .
> > | 0x0a: iso639_language_descriptor
> > | lang: tur (type: 0)
> > | 0x03: audio_stream_descriptor
> > | 67 g
> > | 0x0e: maximum_bitrate_descriptor
> > | c0 02 03 ...
> > |- stream 0x1773: ISO/IEC 13818-1 Private Sections (5)
> > | descriptor length 13
> > | 0x0e: maximum_bitrate_descriptor
> > | c0 02 ee ...
> > | 0x6f: application_signalling_descriptor
> > | 00 10 e0 ...
> > | 0x52: stream_identifier_descriptor
> > | 04 .
> > |_ 3 streams
> > Program #3 ID 0x0066, service ID 0x3269
> > dvb_read_sections: waiting for table ID 0x02, program ID 0x66
> > dvb_parse_section: received table 0x02, extension ID 0x3269, section 0/0
> > dvb_parse_section: table 0x02, extension ID 0x3269: done
> > PMT
> > | table_id 0x02
> > | section_length 55
> > | one 3
> > | zero 0
> > | syntax 1
> > | transport_stream_id 12905
> > | current_next 1
> > | version 0
> > | one2 3
> > | section_number 0
> > | last_section_number 0
> > |- pcr_pid 0bbd
> > | reserved2 7
> > | descriptor length 23
> > | zero3 0
> > | reserved3 15
> > | 0x0e: maximum_bitrate_descriptor
> > | c0 01 41 ..A
> > | 0x09: conditional_access_descriptor
> > | ca_id 0x2600
> > | ca_pid 0x1fff
> > | privdata length 0
> > | 0x10: smoothing_buffer_descriptor
> > | c0 02 71 c0 04 00 ..q...
> > | 0x0b: system_clock_descriptor
> > | 42 3f B?
> > |\
> > |- stream 0x0bbd: Audio ISO/IEC 11172 (3)
> > | descriptor length 14
> > | 0x52: stream_identifier_descriptor
> > | 02 .
> > | 0x0e: maximum_bitrate_descriptor
> > | c0 01 40 ..@
> > | 0x0a: iso639_language_descriptor
> > | lang: und (type: 0)
> > |_ 1 streams
> > dvb_read_sections: waiting for table ID 0x40, program ID 0x10
> > ERROR dvb_read_sections: no data read on section filter
> > ERROR error while reading the NIT table
> > dvb_read_sections: waiting for table ID 0x42, program ID 0x11
> > dvb_parse_section: received table 0x42, extension ID 0xa414, section 0/0
> > dvb_parse_section: table 0x42, extension ID 0xa414: done
> > SDT
> > | table_id 0x42
> > | section_length 67
> > | one 3
> > | zero 1
> > | syntax 1
> > | transport_stream_id 42004
> > | current_next 1
> > | version 4
> > | one2 3
> > | section_number 0
> > | last_section_number 0
> > | network_id 1070
> > | reserved 255
> > |\
> > |- service 0x3264
> > | EIT schedule 0
> > | EIT present following 0
> > | free CA mode 0
> > | running status 4
> > | descriptor length 11
> > | 0x48: service_descriptor
> > | service type 1
> > | provider 'TV8'
> > | name 'TV8'
> > |- service 0x3265
> > | EIT schedule 0
> > | EIT present following 0
> > | free CA mode 0
> > | running status 4
> > | descriptor length 15
> > | 0x48: service_descriptor
> > | service type 1
> > | provider 'TV8 5'
> > | name 'TV8 5'
> > |- service 0x3269
> > | EIT schedule 0
> > | EIT present following 0
> > | free CA mode 1
> > | running status 4
> > | descriptor length 14
> > | 0x48: service_descriptor
> > | service type 2
> > | provider 'TV8'
> > | name 'TV8Ifb'
> > |_ 3 services
> > Service TV8, provider TV8: digital television
> > Storing as channel TV8
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > 0x00007ffff7ba5cff in dvb_store_channel ()
> >    from /usr/lib/x86_64-linux-gnu/libdvbv5.so.0
> > (gdb) backtrace
>
>
> > #0 0x00007ffff7ba5cff in dvb_store_channel ()
> >    from /usr/lib/x86_64-linux-gnu/libdvbv5.so.0
> > #1 0x00005555555560c6 in run_scan (dvb=0x55555575d2e0, args=0x7fffffffdc80)
> >     at dvbv5-scan.c:313
> > #2 main (argc=<optimized out>, argv=<optimized out>) at dvbv5-scan.c:562
> >
>
> Just this isn't enough to identify where the error happened. This is
> just a call to the libdvbv5, where the dvb_store_channel() function is
> implemented.
>
> We can't even reproduce it here, as we would need to have the same
> TV signal you're using.
>
> I could try to simulate it here, but I would need you to zap into the
> transponder and record ~60 seconds (using dvbv5-zap -P), for me to be
> able to use my RF generator and try to simulate the error.
>
> The file will be big, so you'll need to temporarely store it at Google
> Drive or some other similar service and pass me a link for downloading
> it.
>
> Thanks,
> Mauro




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