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Issue 792103 link

Starred by 1 user
Status: Assigned
Merged: issue 779958
Owner:
capn@chromium.org
Cc:
kkaluri@chromium.org
sugoi@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 3
Type: Bug



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Undefined-shift in ConstantUnion::operator>>

Project Member Reported by ClusterFuzz, Dec 5 2017 
Detailed report: https://clusterfuzz.com/testcase?key=6621738296410112

Fuzzer: libFuzzer_swiftshader_vertex_routine_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  ConstantUnion::operator>>
  TIntermConstantUnion::fold
  TIntermediate::addBinaryMath
  
Sanitizer: undefined (UBSAN)

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

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6621738296410112

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 5 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.

Comment 2 by kkaluri@chromium.org, Dec 6 2017

Cc: kkaluri@chromium.org
Labels: M-65 Test-Predator-Wrong
Mergedinto: 779958
Status: Duplicate (was: Untriaged)
This looks similar to   Issue 779958  , hence merging into, 
please undo if it not the case.

Comment 3 by kkaluri@chromium.org, Dec 6 2017

Owner: capn@chromium.org
Status: Assigned (was: Duplicate)
Capn@ Could you please look into this issue as it related to SwiftShader issue

Comment 4 by capn@chromium.org, Dec 6 2017

Labels: -Pri-2 Pri-3
I don't think it's the same as  Issue 779958 . It's benign though, because the result of the shift is also undefined for the shader language that we're compiling.
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