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authorLars Knoll <lars.knoll@digia.com>2014-03-25 14:55:34 (GMT)
committerThe Qt Project <gerrit-noreply@qt-project.org>2014-04-03 10:47:43 (GMT)
commit343df131f7207d65932c6505769aa2fb7fc04713 (patch)
treeeb21e990c881d79f39a5bc85a5366df8190d5f7a /src/3rdparty/libjpeg/jcdctmgr.c
parent565f5236c6c72effa914ae0537a1fb2b0de1027c (diff)
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Avoid out of bounds memory reads when scaling imagesv4.8.6
The calculation of the width/height required for the scaling algorithm was prone to floating point rounding issues, where the lower value got rounded down, the higher one rounded up. This could lead to a situation where we iterated over one more line/pixel in the line than we have in the source image. Correct this by passing the dimension of the source image into the function and bounds checking the values before iterating. Backport of If44b2235a479224660d508a0504fec40d724763a from Qt 5 Task-number: QTBUG-35927 Change-Id: If145ee715a143b889538243f45227d8d78a0050f Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
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