avcodec/pngdec: Check compression method
authorMichael Niedermayer <michael@niedermayer.cc>
Fri, 9 Nov 2018 02:12:45 +0000 (03:12 +0100)
committerMichael Niedermayer <michael@niedermayer.cc>
Sun, 18 Nov 2018 01:35:03 +0000 (02:35 +0100)
commitde1d2ea6b20ac6c2a2bf23e67d07a86b87836386
treec79cc219214ef0c4806b9bdbf6c37f05841866ae
parent0612e6a0d7dea838211e60c53491a0caff1842d4
avcodec/pngdec: Check compression method

method 0 (inflate/deflate) is the only specified in the specification and the only supported

Fixes: Timeout
Fixes: 10976/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PNG_fuzzer-5729372588736512

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 1f99674ddddcc33f4c37def0a206e31ad7c4c1af)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/pngdec.c