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Issue 788523 link

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Issue metadata

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



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Null-dereference READ in TParseContext::addFunctionCallOrMethod

Project Member Reported by ClusterFuzz, Nov 25 2017

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=4849818735476736

Fuzzer: libFuzzer_swiftshader_vertex_routine_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  TParseContext::addFunctionCallOrMethod
  yyparse
  PaParseStrings
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=512576:512620

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4849818735476736

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Nov 25 2017

Cc: capn@google.com cwallez@google.com
Labels: Test-Predator-Auto-CC
Automatically adding ccs based on suspected regression changelists:

Fill vertex routine state for fuzzer. by capn@google.com - https://swiftshader.googlesource.com/SwiftShader/+/b6f0e40bbe40613f6ba0ff4c13f4ff2c06d6517a

vertex_routine_fuzzer: Get source from `data` by cwallez@google.com - https://swiftshader.googlesource.com/SwiftShader/+/1730b2df1391bba3dc580fbb9f17382f93521665

If this is incorrect, please apply the Test-Predator-Wrong-CLs label.
Cc: -capn@google.com msrchandra@chromium.org pnangunoori@chromium.org
Components: Internals>GPU>SwiftShader
Labels: M-64
Owner: capn@chromium.org
Status: Assigned (was: Untriaged)
capn@ -- Could you please look into this issue as the issue is related to Swiftshader.

Thanks.
Project Member

Comment 3 by ClusterFuzz, Dec 5 2017

ClusterFuzz has detected this issue as fixed in range 521492:521536.

Detailed report: https://clusterfuzz.com/testcase?key=4849818735476736

Fuzzer: libFuzzer_swiftshader_vertex_routine_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  TParseContext::addFunctionCallOrMethod
  yyparse
  PaParseStrings
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=512576:512620
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=521492:521536

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4849818735476736

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reference.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 4 by ClusterFuzz, Dec 5 2017

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 4849818735476736 is verified as fixed, so closing issue as verified.

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

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