We are hitting this regression a lot. Looks like regression from https://chromium.googlesource.com/chromium/src//+/330deea56e27bc760fa52101040a51428bb7f582, but already reverted in https://codereview.chromium.org/2025503002/.

Sorry, I screwed up my assert and there's a buffer overflow in there since I call lengthOfNullTermiantedString() on non-null terminated UChar*'s. It was fixed and relanded today. Let me know if things show up again.

Thanks Elliot for the fix, will let you know if things still remain.

ClusterFuzz has detected this issue as fixed in range 396634:396810.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6483771499216896

Fuzzer: attekett_surku_fuzzer
Job Type: linux_asan_chrome_mp
Platform Id: linux

Crash Type: Heap-buffer-overflow READ 2
Crash Address: 0x61000001e5fc
Crash State:
  blink::concatenateFamilyName
  blink::CSSPropertyParser::parseFontFaceDescriptor
  blink::CSSPropertyParser::parseValue
  
Recommended Security Severity: Medium

Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_asan_chrome_mp&range=396459:396493
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_asan_chrome_mp&range=396634:396810

Minimized Testcase (0.09 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv97NQhfQSzxUhz32iv5Di_E7-vyiuEhds07956wZqSk2wIXjKxgXxTRDUcC1DkjdBQ8pgbNrst6o82L9dvQ34kIUZiBHqEES4V4klk14ioJWakU8PUlqD_P3_23NxRN3fEb-JPAHxH57Ca2wlD9N_f5zt7gJ2w
<style>@font-face{font-family:'myfont';src:local(Courier);unicode-r�p+H�~��ode-range:U+062-60;


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.

Sorry to say that this was found before to this fuzzer hitting it, so no reward given.

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

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

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