6633327d59
dmx_section_feed_release_filter() locks dvbdmx->mutex and if the feed is still filtering, it calls feed->stop_filtering(feed). stop_filtering() is implemented by dmx_section_feed_stop_filtering() that first of all try to lock the same mutex: dvbdmx->mutex. That leads to a deadlock. It does not happen often in practice because all callers of release_filter() stop filtering by themselves. So the problem can happen in case of race condition only. The patch releases dvbdmx->mutex before call to feed->stop_filtering(feed) and reacquires the mutex after that. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com> |
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| .. | ||
| demux.h | ||
| dmxdev.c | ||
| dmxdev.h | ||
| dvb_ca_en50221.c | ||
| dvb_ca_en50221.h | ||
| dvb_demux.c | ||
| dvb_demux.h | ||
| dvb_filter.c | ||
| dvb_filter.h | ||
| dvb_frontend.c | ||
| dvb_frontend.h | ||
| dvb_math.c | ||
| dvb_math.h | ||
| dvb_net.c | ||
| dvb_net.h | ||
| dvb_ringbuffer.c | ||
| dvb_ringbuffer.h | ||
| dvb-usb-ids.h | ||
| dvbdev.c | ||
| dvbdev.h | ||
| Kconfig | ||
| Makefile | ||