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>
Mon, 21 Jan 2019 06:53:25 +0000 (07:53 +0100)
commit89d65915cf6e7d79bd57896a4eb3fd626e699fc1
tree6f4146370f6f7f5cc72f9d70d7dab121efff3a34
parente69bb0fb05550523a143efdfeffd51d4d2e813c4
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