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

reed@, tomhudson@: Please help triage this bug and find the right owner. Thanks.

FYI Skia bugs should be assigned to the developer if CL/code owner is obvious, or to Skia component for triage, or me.  tomhudson@ has not worked on Skia in some time, reed@ is out and sometimes overused...don't want these to get lost in the mix!

Sending to Yuqian to see if he sees anything in the AA code...

ClusterFuzz has detected this issue as fixed in range 491156:491274.

Detailed report: https://clusterfuzz.com/testcase?key=5613929987571712

Fuzzer: afl_paint_op_buffer_fuzzer
Job Type: afl_chrome_asan
Platform Id: linux

Crash Type: Stack-buffer-overflow READ 16
Crash Address: 0x7f49719a0ccb
Crash State:
  add_aa_span
  MaskSuperBlitter::blitH
  walk_edges
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=afl_chrome_asan&range=489460:489535
Fixed: https://clusterfuzz.com/revisions?job=afl_chrome_asan&range=491156:491274

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5613929987571712


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 5613929987571712 is verified as fixed, so closing issue as verified.

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

This bug requires manual review: M62 has already been promoted to the beta branch, so this requires manual review
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), bhthompson@(ChromeOS), abdulsyed@(Desktop)

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

Clusterfuzz noted this is fixed in M62

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