This issue is a security regression. If you are not able to fix this quickly, please revert the change that introduced it.

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XFA => not shipping, Probe() => severity low.

CF objecting to a ptr to .data() in a vector of .size() 0.

https://pdfium-review.googlesource.com/5750 is the CL.

ClusterFuzz has detected this issue as fixed in range 473689:473746.

Detailed report: https://clusterfuzz.com/testcase?key=4545061466669056

Fuzzer: libfuzzer_pdfium_xfa_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Container-overflow READ 1
Crash Address: 0x611000001800
Crash State:
  CFX_UnownedPtr<unsigned char const>::Probe
  CFX_SAXReader::NotifyTargetData
  CFX_SAXReader::ParseMaybeClose
  
Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=472960:473004
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=473689:473746

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4545061466669056


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.

ClusterFuzz testcase 4545061466669056 is verified as fixed, so closing issue.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.

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