ffm: reject invalid codec_id and codec_type
authorAndreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Mon, 14 Dec 2015 21:11:55 +0000 (22:11 +0100)
committerAndreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Thu, 17 Dec 2015 19:04:25 +0000 (20:04 +0100)
commit0b24a0e0f12f0a57a54bfbbf9637855ef8b2f698
treee3a11ae76a784035afedd08bb9874b42a4d3404e
parenta79a5c32f92400fda48e2b6c5372a0d49ace4f7a
ffm: reject invalid codec_id and codec_type

A negative codec_id cannot be handled by the found_decoder API of
AVStream->info: if the codec_id is not recognized, found_decoder is set
to -codec_id, which has to be '<0' according to the API documentation.

This can cause NULL pointer dereferencing in try_decode_frame.

Also make sure the codec_type matches the expected one for codec_id.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit ecf63b7cc24b9fd3e6d604313325dd1ada4db662)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
libavformat/ffmdec.c