Hi, kcwu@:

There is a heap over flow issue in function BilinearInterpFloat at https://code.google.com/p/chromium/codesearch#chromium/src/third_party/pdfium/third_party/lcms2-2.6/src/cmsintrp.c&sq=package:chromium&type=cs&l=364.

Please check the index boundaries in function BilinearInterpFloat.

Please look at the detailed report for the stacks information.

Is this  bug 654265 ?

Yes, it is the same issue. I merged the two.

ClusterFuzz has detected this issue as fixed in range 434003:434104.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5591320581373952

Fuzzer: afl_pdf_codec_icc_fuzzer
Job Type: afl_chrome_asan
Platform Id: linux

Crash Type: Heap-buffer-overflow READ 4
Crash Address: 0x603000000600
Crash State:
  BilinearInterpFloat
  _LUTevalFloat
  XFormSampler16
  
Recommended Security Severity: Medium

Regressed: https://cluster-fuzz.appspot.com/revisions?job=afl_chrome_asan&range=420425:420578
Fixed: https://cluster-fuzz.appspot.com/revisions?job=afl_chrome_asan&range=434003:434104

Minimized Testcase (0.20 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97-nGWvZQLm-a_24TpWJYqvcsAEG4JjD5WL3-1njE3OZcryESmNKuyqVmJpSPC3W3zGa0-OfK3hqxgNP6_8uf7Jlz9v1flUu63Fl5QhP79ZKXHbTSPd_IDW1hRsv8RdY-fTP2wL4YgL7FBBt9H6I350hCd1-Q?testcase_id=5591320581373952

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.

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot