The top of the stack isn't shown, but it indicates a simple failure to allocate. Probably not interesting and this would just hard crash in production due to OOM being fatal.

#0 0x10efc7f8b in construct<unsigned char, const unsigned char &> third_party/llvm-build/Release+Asserts/include/c++/v1/memory:1798:13
#1 0x10efc7f8b in __construct<unsigned char, const unsigned char &> third_party/llvm-build/Release+Asserts/include/c++/v1/memory:1709
#2 0x10efc7f8b in construct<unsigned char, const unsigned char &> third_party/llvm-build/Release+Asserts/include/c++/v1/memory:1555
#3 0x10efc7f8b in __construct_at_end third_party/llvm-build/Release+Asserts/include/c++/v1/vector:1006
#4 0x10efc7f8b in std::__1::vector<unsigned char, std::__1::allocator<unsigned char> >::vector(unsigned long, unsigned char const&) third_party/llvm-build/Release+Asserts/include/c++/v1/vector:1104
#5 0x10efe01e5 in safe_browsing::dmg::(anonymous namespace)::UDIFBlockChunkReadStream::HandleZLib(unsigned char*, unsigned long, unsigned long*) chrome/utility/safe_browsing/mac/udif.cc:792:26

ClusterFuzz has detected this issue as fixed in range 485997:486042.

Detailed report: https://clusterfuzz.com/testcase?key=6217737461563392

Fuzzer: libFuzzer_safe_browsing_dmg_fuzzer
Job Type: mac_libfuzzer_chrome_asan
Platform Id: mac

Crash Type: Null-dereference WRITE
Crash Address: 0x000000000000
Crash State:
  safe_browsing::dmg::UDIFBlockChunkReadStream::HandleZLib
  safe_browsing::dmg::UDIFPartitionReadStream::Read
  safe_browsing::dmg::ReadStream::ReadExact
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=mac_libfuzzer_chrome_asan&range=423384:423408
Fixed: https://clusterfuzz.com/revisions?job=mac_libfuzzer_chrome_asan&range=485997:486042

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6217737461563392


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 6217737461563392 is verified as fixed, so closing issue.

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

ClusterFuzz has detected this issue as fixed in range 485997:486042.

Detailed report: https://clusterfuzz.com/testcase?key=6217737461563392

Fuzzer: libFuzzer_safe_browsing_dmg_fuzzer
Job Type: mac_libfuzzer_chrome_asan
Platform Id: mac

Crash Type: Null-dereference WRITE
Crash Address: 0x000000000000
Crash State:
  safe_browsing::dmg::UDIFBlockChunkReadStream::HandleZLib
  safe_browsing::dmg::UDIFPartitionReadStream::Read
  safe_browsing::dmg::ReadStream::ReadExact
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=mac_libfuzzer_chrome_asan&range=423384:423408
Fixed: https://clusterfuzz.com/revisions?job=mac_libfuzzer_chrome_asan&range=485997:486042

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6217737461563392


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.