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Issue metadata

Status: Verified
Owner:
Closed: Jan 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 2
Type: Bug



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Stack-overflow in pp::MacroExpander::collectMacroArgs

Project Member Reported by ClusterFuzz, Dec 22 2017

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=4945342012588032

Fuzzer: libFuzzer_swiftshader_vertex_routine_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Stack-overflow
Crash Address: 0x7ffc01424ff8
Crash State:
  pp::MacroExpander::collectMacroArgs
  pp::MacroExpander::expandMacro
  pp::MacroExpander::pushMacro
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=521502:521555

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4945342012588032

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Dec 22 2017

Components: Internals>GPU>SwiftShader
Labels: Test-Predator-Auto-Components
Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.
Cc: kkaluri@chromium.org
Labels: M-65 Test-Predator-Wrong
Owner: capn@chromium.org
Status: Assigned (was: Untriaged)
Since it is related to Swiftshader component, assigning it to capn@

capn@ could you please look into it


Thank You...

Comment 3 by capn@chromium.org, Dec 22 2017

Cc: sugoi@chromium.org
Labels: -Pri-1 Pri-2
We very recently updated SwiftShader's GLSL preprocessor with ANGLE's, and the latter also has a fuzzer like this so it probably already fixed the issue. We haven't rolled DEPS to a newer revision yet though...
Project Member

Comment 4 by ClusterFuzz, Jan 13 2018

ClusterFuzz has detected this issue as fixed in range 529109:529113.

Detailed report: https://clusterfuzz.com/testcase?key=4945342012588032

Fuzzer: libFuzzer_swiftshader_vertex_routine_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Stack-overflow
Crash Address: 0x7ffc01424ff8
Crash State:
  pp::MacroExpander::collectMacroArgs
  pp::MacroExpander::expandMacro
  pp::MacroExpander::pushMacro
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=521502:521555
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=529109:529113

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4945342012588032

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 5 by ClusterFuzz, Jan 13 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 4945342012588032 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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