The ATSC A/65C standard (in Section 6.5) allows the "title_length" field
in the Event Information Table (EIT) to be set to zero, but the "atsc_epg"
program crashes with the following backtrace if that happens:
Core was generated by `./atsc_epg -t -f 521000000'.
Program terminated with signal 11, Segmentation fault.
#0 0x080484b2 in atsc_text_strings_first (txt=0x0)
at ../../lib/libucsi/atsc/types.h:174
174 if (txt->number_strings == 0)
(gdb) bt
#0 0x080484b2 in atsc_text_strings_first (txt=0x0)
at ../../lib/libucsi/atsc/types.h:174
#1 0x08049670 in parse_events (curr_info=0x811bd4c, eit=0xbfcd0d78,
section=0x8302710) at atsc_epg.c:647
#2 0x08049be6 in parse_eit (dmxfd=4, index=1, pid=7425) at atsc_epg.c:806
#3 0x0804aa39 in main (argc=4, argv=0xbfcd1ee4) at atsc_epg.c:1197
This patch simply skips parsing title text data if title_length is zero.
Signed-off-by: Bob Ross <pigiron@xxxxxxx>
---
util/atsc_epg/atsc_epg.c | 2 ++
1 file changed, 2 insertions(+)
diff -uprN dvb-apps.orig/util/atsc_epg/atsc_epg.c dvb-apps/util/atsc_epg/atsc_epg.c
--- dvb-apps.orig/util/atsc_epg/atsc_epg.c 2011-07-01 20:32:30.000000000 -0500
+++ dvb-apps/util/atsc_epg/atsc_epg.c 2011-07-08 17:32:43.000000000 -0500
@@ -644,6 +644,8 @@ static int parse_events(struct atsc_chan
}
title = atsc_eit_event_name_title_text(e);
+ if (title == NULL)
+ continue;
atsc_text_strings_for_each(title, str, j) {
struct atsc_text_string_segment *seg;
--
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