Predator, CL and Code Search did not provide any possible suspects.
Assigning to the concern owner who might be related to the file, "pngerror.c"

@msarett -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

Looks like same  issue 698971 .
From regression range, suspected CL could be
https://chromium.googlesource.com/chromium/src/+/11a3425fff09d249101f8fb0dcd9c00ddb80283b
scroggo@, could you please take a look?
Thank you

ClusterFuzz has detected this issue as fixed in range 455091:455226.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6696539117584384

Fuzzer: libfuzzer_libpng_progressive_read_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: UNKNOWN
Crash Address: 0x03e900007516
Crash State:
  cr_png_longjmp
  png_default_error
  cr_png_error
  
Sanitizer: address (ASAN)

Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan_debug&range=454894:455009
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan_debug&range=455091:455226

Reproducer Testcase: https://cluster-fuzz.appspot.com/download/AMIfv97NVtmdrHgz1QcyrjAxQ30xJ833yDFfqHQwLa15N2B5DY4wZLMh06AF_24hXHp_hxgCB7uXFqR-c4SGKzll4VvA5iYPSQmeUPr7uCFMb0O__voznqiUgGe8ZLsroqARn4m5KhlTiaf0vO4E8HCPhNy83XIgmhTNogaHo1YMF5nJzj_brj5Ui7h_GQ18VgZSjh8lytEP3sIGrwiPRo1-rBT6S_ixU8ueTsdd6aGAg__7jgTyNEqgV1W663GQe3ZuaWILQ6CXwpMCk4O0MBHtcDjI01gaXYvXO8qcVgai52rbJ80OUU_m2Lx26K28k5EAevOAz6UeJ-Kz6K57-Jh5ffg6jOj4bxmoV3tshlUjuQuo6vhKmsQ?testcase_id=6696539117584384


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.