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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-04-05 00:20:33 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-04-05 12:05:47 +0200 |
| commit | 2169a3f262beedcb06fdb0e0e5277a680570df13 (patch) | |
| tree | 6bd5444df5555aaddf0960c4fd22a5fa3f9456c7 /libavcodec/agm.c | |
| parent | 18a851aca766ff8c7199c9e0c37d8fa642e41920 (diff) | |
| download | ffmpeg-2169a3f262beedcb06fdb0e0e5277a680570df13.tar.gz | |
avcodec/agm: Fix integer overflow with w/h
Fixes: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
Fixes: 13999/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5644405991538688
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/agm.c')
| -rw-r--r-- | libavcodec/agm.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavcodec/agm.c b/libavcodec/agm.c index 2d2092222d..cbd45e8095 100644 --- a/libavcodec/agm.c +++ b/libavcodec/agm.c @@ -535,11 +535,13 @@ static int decode_frame(AVCodecContext *avctx, void *data, s->flags = 0; w = bytestream2_get_le32(gbyte); + h = bytestream2_get_le32(gbyte); + if (w == INT32_MIN || h == INT32_MIN) + return AVERROR_INVALIDDATA; if (w < 0) { w = -w; s->flags |= 2; } - h = bytestream2_get_le32(gbyte); if (h < 0) { h = -h; s->flags |= 1; |