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More lcms fun. kcwu@ if you don't have time please feel free to assign back to me.

I don't have free time to help. Reassigned.

ClusterFuzz has detected this issue as fixed in range 452123:452182.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6017538136997888

Fuzzer: libfuzzer_pdf_codec_icc_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  Type_MPEmatrix_Read
  ReadMPEElem
  ReadPositionTable
  
Sanitizer: undefined (UBSAN)

Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=452123:452182

Reproducer Testcase: https://cluster-fuzz.appspot.com/download/AMIfv95ue-OCn9DaCaMaY5mOvatwZY9x9BD0ViRskpsFQxHvUnOaxugMzIcyLE414IVI4Wkvk4jh5mK6p-qtWUI4rfbsrCCH0311DYnBk8ovGq4IKve4d77Ovn1tIWL7JAv4j43dpivemXWqtbHI7gspDI1txGP8O-SafCNrIWa2kIDc2fGUjFKMIzhkM2s0qUEjefxLQA0554HyscWwnp5bThuiGWxQPJ29GeSgU8wkvHq2CDmrdpvkMwHFZQFmqD0qs2Q21RaRWxOfDq7iBKneuRQhoNv9vW6EV6Wd53-5MX1oSHfjwnCDdHeW0NRvKJZnCz0L1i2D1MSRMo5jeoaZZnU7tM4PujGUfmQkuMd3YbQ4vtwVYkQ?testcase_id=6017538136997888


See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

Fixed along with  issue 675617 , should I dup? I'm not sure if it will be easy to figure out if there's really a potential integer overflow without the testcase.