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avcodec/jpeg2000dec: Fix off by 1 error in JPEG2000_PGOD_CPRL handling

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Fixes: assertion failure
Fixes: 10785/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-5672160496975872

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 305e523105f6f59e7572050f19edc9f4671c036c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-10-20 22:35:37 +02:00
parent 947f7af048
commit 98444e0222
1 changed files with 1 additions and 1 deletions
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2
libavcodec/jpeg2000dec.c
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@ -1128,7 +1128,7 @@ static int jpeg2000_decode_packets_po_iteration(Jpeg2000DecoderContext *s, Jpeg2
step_x = 32;
step_y = 32;
if (RSpoc > FFMIN(codsty->nreslevels, REpoc))
if (RSpoc >= FFMIN(codsty->nreslevels, REpoc))
continue;
for (reslevelno = RSpoc; reslevelno < FFMIN(codsty->nreslevels, REpoc); reslevelno++) {