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avcodec/ansi: Check initial dimensions

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Fixes: Timeout (minutes to less than 1sec)
Fixes: 25682/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ANSI_fuzzer-6320712032452608

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-09-19 21:17:32 +02:00
parent 106f11f68a
commit 949f0a6be9
1 changed files with 6 additions and 0 deletions
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6
libavcodec/ansi.c
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@ -475,6 +475,11 @@ static av_cold int decode_close(AVCodecContext *avctx)
return 0;
}
static const AVCodecDefault ansi_defaults[] = {
{ "max_pixels", "640*480" },
{ NULL },
};
AVCodec ff_ansi_decoder = {
.name = "ansi",
.long_name = NULL_IF_CONFIG_SMALL("ASCII/ANSI art"),
@ -486,4 +491,5 @@ AVCodec ff_ansi_decoder = {
.decode = decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
.defaults = ansi_defaults,
};