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Issue metadata

Status: Verified
Owner:
Last visit 18 days ago
Closed: Aug 15
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 2
Type: Bug



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Null-dereference READ in spvtools::val::Instruction::opcode

Project Member Reported by ClusterFuzz, Aug 10

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=6533366623764480

Fuzzer: afl_spvtools_opt_size_fuzzer
Job Type: afl_chrome_asan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x00000000003a
Crash State:
  spvtools::val::Instruction::opcode
  spvtools::val::CheckDecorationsOfBuffers
  spvtools::val::ValidateDecorations
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=afl_chrome_asan&range=581965:581976

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6533366623764480

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Aug 10

Components: Internals>GPU>Internals
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: dsinclair@chromium.org vmi...@chromium.org piman@chromium.org
Owner: alanbaker@google.com
Status: Assigned (was: Untriaged)
Labels: -Pri-1 Pri-2
Note, this is not used in prod, so no need for P1.
Project Member

Comment 5 by ClusterFuzz, Aug 15

ClusterFuzz has detected this issue as fixed in range 583092:583110.

Detailed report: https://clusterfuzz.com/testcase?key=6533366623764480

Fuzzer: afl_spvtools_opt_size_fuzzer
Job Type: afl_chrome_asan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x00000000003a
Crash State:
  spvtools::val::Instruction::opcode
  spvtools::val::CheckDecorationsOfBuffers
  spvtools::val::ValidateDecorations
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=afl_chrome_asan&range=581965:581976
Fixed: https://clusterfuzz.com/revisions?job=afl_chrome_asan&range=583092:583110

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6533366623764480

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 6 by ClusterFuzz, Aug 15

Labels: ClusterFuzz-Verified
Status: Verified (was: Started)
ClusterFuzz testcase 6533366623764480 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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