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avformat/mov: check extent_offset calculation for overflow

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Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2024-06-30 23:40:20 -03:00
parent b44758d8e4
commit fbe52bd65c
1 changed files with 2 additions and 1 deletions
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3
libavformat/mov.c
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@ -8104,7 +8104,8 @@ static int mov_read_iloc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
}
for (int j = 0; j < extent_count; j++) {
if (rb_size(pb, &extent_offset, offset_size) < 0 ||
rb_size(pb, &extent_length, length_size) < 0)
rb_size(pb, &extent_length, length_size) < 0 ||
base_offset > INT64_MAX - extent_offset)
return AVERROR_INVALIDDATA;
if (offset_type == 1)
c->heif_item[i].is_idat_relative = 1;