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Issue 831556 link

Starred by 1 user
Status: WontFix
Owner:
dalecur...@chromium.org
Closed: Apr 2018
Cc:
mlamouri@chromium.org
infe...@chromium.org
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 11 2018 
Detailed report: https://clusterfuzz.com/testcase?key=6621225175220224

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Bad-cast
Crash Address: 0x16e30b257900
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=6621225175220224

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Apr 11 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 11 2018

Labels: M-65
Project Member

Comment 3 by sheriffbot@chromium.org, Apr 11 2018

Labels: Pri-1

Comment 4 by carlosil@chromium.org, Apr 12 2018

Owner: dalecur...@chromium.org
Status: Assigned (was: Untriaged)
dalecurtis: Assigning to you since this seems to be in Blink>Media, I couldn't find anything immediately obvious in the CL range suggested by Clusterfuzz, feel free to reassign if appropriate.

Comment 5 by dalecur...@chromium.org, Apr 12 2018

Cc: infe...@chromium.org mlamouri@chromium.org
Status: WontFix (was: Assigned)
This is another issue due to ClusterFuzz having access to test only media.internals methods :/ We need to block internals.setMediaElementNetworkState() from ClusterFuzz usage.

Comment 6 by dalecur...@chromium.org, Apr 12 2018 

If we don't run layout tests with asan enabled, we should just disable this method when built with sanitizers.
Project Member

Comment 7 by ClusterFuzz, Apr 19 2018

Labels: Needs-Feedback
ClusterFuzz testcase 6621225175220224 is still reproducing on tip-of-tree build (trunk).

If this testcase was not reproducible locally or unworkable, ignore this notification and we will file another bug soon with hopefully a better and workable testcase.

Otherwise, if this is not intended to be fixed (e.g. this is an intentional crash), please add ClusterFuzz-Ignore label to prevent future bug filing with similar crash stacktrace.
Project Member

Comment 8 by sheriffbot@chromium.org, Jul 20

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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