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

If this doesn't affect a release branch, or has not been properly classified for severity, please update the Security_Impact or Security_Severity labels, and remove the ReleaseBlock label. To disable this altogether, apply ReleaseBlock-NA.

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

Not sure whether this is Skia or PDFium issue.

Nicolás, I see that you've been changing some code around the stack trace, could you please help to triage this?

The skia experiment has been turned off again.

ClusterFuzz has detected this issue as fixed in range 482264:482277.

Detailed report: https://clusterfuzz.com/testcase?key=5012044016517120

Fuzzer: ifratric_pdf_generic
Job Type: mac_asan_chrome
Platform Id: mac

Crash Type: Stack-buffer-overflow READ 4
Crash Address: 0x00010e4779e8
Crash State:
  CFX_SkiaDeviceDriver::DrawShading
  CPDF_RenderStatus::DrawShading
  CPDF_RenderStatus::ProcessShading
  
Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=mac_asan_chrome&range=481544:481568
Fixed: https://clusterfuzz.com/revisions?job=mac_asan_chrome&range=482264:482277

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5012044016517120


See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs 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 5012044016517120 is verified as fixed, so closing issue.

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

Reopening. "Fixed" because we turned off Skia paths.

Fixed in https://pdfium-review.googlesource.com/c/7273/

Not a ClusterFuzz mistake based on c#9.

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