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Issue metadata

Status: WontFix
Owner:
Closed: May 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug-Security



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Bad-cast to blink::WebAudioSourceProvider from invalid vptr in blink::HTMLMediaElement::AudioSourceProviderImpl::Wrap

Project Member Reported by ClusterFuzz, Apr 28 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5442755254550528

Fuzzer: inferno_layout_test_fuzzer
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Bad-cast
Crash Address: 0x127719f87900
Crash State:
  Bad-cast to blink::WebAudioSourceProvider from invalid vptr
  blink::HTMLMediaElement::AudioSourceProviderImpl::Wrap
  blink::HTMLMediaElement::StartPlayerLoad
  
Sanitizer: undefined (UBSAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=527199:527221

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5442755254550528

Additional requirements: Requires HTTP

Issue filed automatically.

See https://github.com/google/clusterfuzz-tools for more information.
 
Project Member

Comment 1 by ClusterFuzz, Apr 28 2018

Components: Blink>Media
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.
Project Member

Comment 2 by sheriffbot@chromium.org, Apr 28 2018

Labels: M-66
Project Member

Comment 3 by sheriffbot@chromium.org, Apr 28 2018

Labels: Pri-1
Owner: dalecur...@chromium.org
Status: Assigned (was: Untriaged)
Hmm.  No suspect CL in range.

dalecurtis@ - You're an owner here and seem to have some familiarity with this code.  Could you take a look or re-assign as appropriate? Thanks!
Cc: mlamouri@chromium.org
Probably this is just ClusterFuzz getting hold of internals.* methods it shouldn't be again. I forget the bug we dupe these into, but will double check.
Status: WontFix (was: Assigned)
Correct. I did reach out to the team and there was no clear answer. I think we should remove setMediaElementNetworkState. It's used in two tests for a total of three times. We already got much more than three clusterfuzz bugs because of it :) 
Project Member

Comment 7 by ClusterFuzz, May 10 2018

ClusterFuzz has detected this issue as fixed in range 557279:557285.

Detailed report: https://clusterfuzz.com/testcase?key=5442755254550528

Fuzzer: inferno_layout_test_fuzzer
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Bad-cast
Crash Address: 0x127719f87900
Crash State:
  Bad-cast to blink::WebAudioSourceProvider from invalid vptr
  blink::HTMLMediaElement::AudioSourceProviderImpl::Wrap
  blink::HTMLMediaElement::StartPlayerLoad
  
Sanitizer: undefined (UBSAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=527199:527221
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=557279:557285

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5442755254550528

Additional requirements: Requires HTTP

See https://github.com/google/clusterfuzz-tools 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 8 by sheriffbot@chromium.org, Aug 9

Labels: -Restrict-View-SecurityTeam 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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