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media: dvb-core: Fix receiving invalid EIT-sections 

Resetting buf without resetting pusi_seen at a channel-switch can lead
to copying the rest of a section to the start of buf, but treating it as
a complete section, when the next pusi arrives.
EIT-sections starting without valid header were randomly received during
an EIT-scan on a transponder.

Signed-off-by: Johann Friedrichs <johann.friedrichs@web.de>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Johann Friedrichs 2019-11-21 16:19:05 +01:00 committed by Mauro Carvalho Chehab
parent c12495132d
commit 000e675182
1 changed files with 1 additions and 0 deletions
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drivers/media/dvb-core/dvb_demux.c
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@ -971,6 +971,7 @@ static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed)
dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
dvbdmxfeed->feed.sec.secbufp = 0;
dvbdmxfeed->feed.sec.seclen = 0;
dvbdmxfeed->pusi_seen = false;
if (!dvbdmx->start_feed) {
mutex_unlock(&dvbdmx->mutex);