diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-08-04 22:42:21 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-08-06 00:38:09 +0200 |
| commit | 5036d7b20cf2af7e30dd3e8785b045aad0b8bbe7 (patch) | |
| tree | a67a5d9521576c4a0baeff4f8c56dbbc420300c8 /libavcodec/jpeg2000dec.c | |
| parent | 5508e7bf8a2aa49fc75813e00f021843637fdf04 (diff) | |
avcodec/jpeg2000dec: Handle reducedresno of 32
Fixes: shift exponent 32 is too large for 32-bit type 'int'
Fixes: 24566/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-6033783737024512
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Gautam Ramakrishnan <gautamramk@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/jpeg2000dec.c')
| -rw-r--r-- | libavcodec/jpeg2000dec.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index 06ad841934..a4c20f45c5 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -1465,20 +1465,20 @@ static int jpeg2000_decode_packets_po_iteration(Jpeg2000DecoderContext *s, Jpeg2 if (reslevelno >= codsty->nreslevels) continue; - trx0 = ff_jpeg2000_ceildiv(tile->coord[0][0], s->cdx[compno] << reducedresno); - try0 = ff_jpeg2000_ceildiv(tile->coord[1][0], s->cdy[compno] << reducedresno); + trx0 = ff_jpeg2000_ceildiv(tile->coord[0][0], (int64_t)s->cdx[compno] << reducedresno); + try0 = ff_jpeg2000_ceildiv(tile->coord[1][0], (int64_t)s->cdy[compno] << reducedresno); if (!(y % ((uint64_t)s->cdy[compno] << (rlevel->log2_prec_height + reducedresno)) == 0 || - (y == tile->coord[1][0] && (try0 << reducedresno) % (1U << (reducedresno + rlevel->log2_prec_height))))) + (y == tile->coord[1][0] && ((int64_t)try0 << reducedresno) % (1ULL << (reducedresno + rlevel->log2_prec_height))))) continue; if (!(x % ((uint64_t)s->cdx[compno] << (rlevel->log2_prec_width + reducedresno)) == 0 || - (x == tile->coord[0][0] && (trx0 << reducedresno) % (1U << (reducedresno + rlevel->log2_prec_width))))) + (x == tile->coord[0][0] && ((int64_t)trx0 << reducedresno) % (1ULL << (reducedresno + rlevel->log2_prec_width))))) continue; // check if a precinct exists - prcx = ff_jpeg2000_ceildiv(x, s->cdx[compno] << reducedresno) >> rlevel->log2_prec_width; - prcy = ff_jpeg2000_ceildiv(y, s->cdy[compno] << reducedresno) >> rlevel->log2_prec_height; + prcx = ff_jpeg2000_ceildiv(x, (int64_t)s->cdx[compno] << reducedresno) >> rlevel->log2_prec_width; + prcy = ff_jpeg2000_ceildiv(y, (int64_t)s->cdy[compno] << reducedresno) >> rlevel->log2_prec_height; prcx -= ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], reducedresno) >> rlevel->log2_prec_width; prcy -= ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], reducedresno) >> rlevel->log2_prec_height; @@ -1543,20 +1543,20 @@ static int jpeg2000_decode_packets_po_iteration(Jpeg2000DecoderContext *s, Jpeg2 Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno; int trx0, try0; - trx0 = ff_jpeg2000_ceildiv(tile->coord[0][0], s->cdx[compno] << reducedresno); - try0 = ff_jpeg2000_ceildiv(tile->coord[1][0], s->cdy[compno] << reducedresno); + trx0 = ff_jpeg2000_ceildiv(tile->coord[0][0], (int64_t)s->cdx[compno] << reducedresno); + try0 = ff_jpeg2000_ceildiv(tile->coord[1][0], (int64_t)s->cdy[compno] << reducedresno); if (!(y % ((uint64_t)s->cdy[compno] << (rlevel->log2_prec_height + reducedresno)) == 0 || - (y == tile->coord[1][0] && (try0 << reducedresno) % (1U << (reducedresno + rlevel->log2_prec_height))))) + (y == tile->coord[1][0] && ((int64_t)try0 << reducedresno) % (1ULL << (reducedresno + rlevel->log2_prec_height))))) continue; if (!(x % ((uint64_t)s->cdx[compno] << (rlevel->log2_prec_width + reducedresno)) == 0 || - (x == tile->coord[0][0] && (trx0 << reducedresno) % (1U << (reducedresno + rlevel->log2_prec_width))))) + (x == tile->coord[0][0] && ((int64_t)trx0 << reducedresno) % (1ULL << (reducedresno + rlevel->log2_prec_width))))) continue; // check if a precinct exists - prcx = ff_jpeg2000_ceildiv(x, s->cdx[compno] << reducedresno) >> rlevel->log2_prec_width; - prcy = ff_jpeg2000_ceildiv(y, s->cdy[compno] << reducedresno) >> rlevel->log2_prec_height; + prcx = ff_jpeg2000_ceildiv(x, (int64_t)s->cdx[compno] << reducedresno) >> rlevel->log2_prec_width; + prcy = ff_jpeg2000_ceildiv(y, (int64_t)s->cdy[compno] << reducedresno) >> rlevel->log2_prec_height; prcx -= ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], reducedresno) >> rlevel->log2_prec_width; prcy -= ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], reducedresno) >> rlevel->log2_prec_height; |