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authorkcwu <kcwu@chromium.org>2016-10-17 06:13:11 -0700
committerCommit bot <commit-bot@chromium.org>2016-10-17 06:13:11 -0700
commit85fcf94eeae589641213c4301bbb16b44b10a282 (patch)
treeb29673f448464f6bf5803e06e2c40aed97989b8e /.clang-format
parent05923132ae08d45fbe957219775a48c55ee57aef (diff)
downloadpdfium-85fcf94eeae589641213c4301bbb16b44b10a282.tar.xz
lcms: reject NaN when reading float numbers
LerpFloat functions expect input values are normal float. They first clamp values to the range of [0.0, 1.0] and then calculate interpolation with the input values. If the input value is NaN, it will lead to heap buffer overflow because the index to LutTable is calculated based on the said value and fclamp(NaN) is not in expected [0.0, 1.0] range. This patch rejects all NaN values earlier when reading float numbers. So it also changed behavior for cases other than LerpFloat. I think it is okay because NaN doesn't make sense for usual calculations. BUG=654676 Review-Url: https://codereview.chromium.org/2422553002
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