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avcodec/jpeg2000: Check sum of sizes of band->prec before allocating 

Fixes: OOM
Fixes: 4810/clusterfuzz-testcase-minimized-6034253235093504

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 2018-01-14 00:39:40 +01:00
parent a1f38c7589
commit 6887e41243
1 changed files with 3 additions and 0 deletions
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3
libavcodec/jpeg2000.c
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@ -541,6 +541,9 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
if (!reslevel->band)
return AVERROR(ENOMEM);
if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y * reslevel->nbands > avctx->max_pixels / sizeof(*reslevel->band->prec))
return AVERROR(ENOMEM);
for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
ret = init_band(avctx, reslevel,
comp, codsty, qntsty,