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avcodec/jpeg2000dec: Clip all tile coordinates

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Fixes out of array access
Fixes: b877a6b788a25c70e8b1d014f8628549/asan_heap-oob_1da2c3f_2324_5a1b329b0b3c4bb6b1d775660ac56717.r3d

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 43492ff3ab)

Conflicts:

	libavcodec/jpeg2000dec.c
This commit is contained in:
Michael Niedermayer 2015-11-07 02:16:11 +01:00
parent 5bb599d0c0
commit 9e755b9b99
1 changed files with 4 additions and 4 deletions
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8
libavcodec/jpeg2000dec.c
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@ -686,10 +686,10 @@ static int init_tile(Jpeg2000DecoderContext *s, int tileno)
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
int ret; // global bandno
comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
comp->coord_o[0][0] = av_clip(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x, s->width);
comp->coord_o[0][1] = av_clip((tilex + 1) * s->tile_width + s->tile_offset_x, s->image_offset_x, s->width);
comp->coord_o[1][0] = av_clip(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y, s->height);
comp->coord_o[1][1] = av_clip((tiley + 1) * s->tile_height + s->tile_offset_y, s->image_offset_y, s->height);
comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor);
comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor);