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Issue metadata

Status: Verified
Owner:
Closed: Mar 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug-Security



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Use-of-uninitialized-value in v8::internal::compiler::JSGraph::Float32Constant

Project Member Reported by ClusterFuzz, Mar 1 2017

Issue description

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6524092724543488

Fuzzer: libfuzzer_v8_wasm_compile_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  v8::internal::compiler::JSGraph::Float32Constant
  v8::internal::wasm::WasmFullDecoder::DecodeFunctionBody
  v8::internal::wasm::WasmFullDecoder::Decode
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_msan&range=453545:453564

Reproducer Testcase: https://cluster-fuzz.appspot.com/download/AMIfv96pYIvjJIFREodTPrJspBl5ScCdYnJLw2BdyzspNwbbistAB53tj-zM2vGHbsLGfq_CkTXaLoT-YTWAYmk32gchBFZWYR6MxMAXzrcCG2_s0cfYV3HL979GCKHpl8D6ZZ0m-r-xGOmjO0wx-Pg3rlbAWJnWWQ061BcDq-maqTj2fMh60u2W8fCrTk3UZhwr54Ji1RnLa7gS3QnrGycpnbAzSQxmSQxPEM5EtfAqAlVv5skfGcofDXvb2w-uGB-bvF6JySDgrX1ApN-nAKVDLhjhbCNHjJhbrTXWTNaFSST2VANDCPxFebWhsfT9VrL5XgHHKlWoFr-Hmc8iR5KrayqwcZoLIekdtIYPxdTwAoTEGUZvoEI?testcase_id=6524092724543488


Issue filed automatically.

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.
 
Project Member

Comment 1 by sheriffbot@chromium.org, Mar 1 2017

Labels: M-58
Project Member

Comment 2 by sheriffbot@chromium.org, Mar 1 2017

Labels: ReleaseBlock-Beta
This issue is a security regression. If you are not able to fix this quickly, please revert the change that introduced it.

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

Comment 3 by sheriffbot@chromium.org, Mar 1 2017

Labels: Pri-1

Comment 4 by vakh@chromium.org, Mar 1 2017

Cc: titzer@chromium.org
Components: Blink>JavaScript
Owner: ahaas@chromium.org
Status: Available (was: Untriaged)
Please help triage this and identify the right owner.
Project Member

Comment 5 by ClusterFuzz, Mar 2 2017

ClusterFuzz has detected this issue as fixed in range 454045:454092.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6524092724543488

Fuzzer: libfuzzer_v8_wasm_compile_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  v8::internal::compiler::JSGraph::Float32Constant
  v8::internal::wasm::WasmFullDecoder::DecodeFunctionBody
  v8::internal::wasm::WasmFullDecoder::Decode
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_msan&range=453545:453564
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_msan&range=454045:454092

Reproducer Testcase: https://cluster-fuzz.appspot.com/download/AMIfv96pYIvjJIFREodTPrJspBl5ScCdYnJLw2BdyzspNwbbistAB53tj-zM2vGHbsLGfq_CkTXaLoT-YTWAYmk32gchBFZWYR6MxMAXzrcCG2_s0cfYV3HL979GCKHpl8D6ZZ0m-r-xGOmjO0wx-Pg3rlbAWJnWWQ061BcDq-maqTj2fMh60u2W8fCrTk3UZhwr54Ji1RnLa7gS3QnrGycpnbAzSQxmSQxPEM5EtfAqAlVv5skfGcofDXvb2w-uGB-bvF6JySDgrX1ApN-nAKVDLhjhbCNHjJhbrTXWTNaFSST2VANDCPxFebWhsfT9VrL5XgHHKlWoFr-Hmc8iR5KrayqwcZoLIekdtIYPxdTwAoTEGUZvoEI?testcase_id=6524092724543488


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.
Project Member

Comment 6 by ClusterFuzz, Mar 2 2017

Labels: ClusterFuzz-Verified
Status: Verified (was: Available)
ClusterFuzz testcase 6524092724543488 is verified as fixed, so closing issue.

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

Comment 7 by sheriffbot@chromium.org, Mar 2 2017

Labels: -Restrict-View-SecurityTeam Restrict-View-SecurityNotify
Labels: -ReleaseBlock-Beta
Project Member

Comment 9 by sheriffbot@chromium.org, Jun 8 2017

Labels: -Restrict-View-SecurityNotify allpublic
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

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