New issue
Advanced search Search tips
Note: Color blocks (like █ or █) mean that a user may not be available. Tooltip shows the reason.

Issue 717693 link

Starred by 1 user
Status: WontFix
Owner: ----
Closed: Jun 2017
Cc:
█ ti...@chromium.org
yosin@chromium.org
█ msrchandra@chromium.org
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



Sign in to add a comment

Crash in GetTreeScope

Project Member Reported by ClusterFuzz, May 2 2017 
Detailed report: https://clusterfuzz.com/testcase?key=6107450209206272

Fuzzer: bj_broddelwerk
Job Type: linux_lsan_chrome_mp
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000020
Crash State:
  GetTreeScope
  ShadowDepthOf<blink::EditingAlgorithm<blink::NodeTraversal>
  blink::TextIteratorAlgorithm<blink::EditingAlgorithm<blink::NodeTraversal> >::In
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_lsan_chrome_mp&range=209699:209703

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6107450209206272


Issue filed automatically.

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

Comment 1 by msrchandra@chromium.org, May 3 2017

Cc: msrchandra@chromium.org
Labels: Test-Predator-Wrong M-59
Owner: ti...@chromium.org
Status: Assigned (was: Untriaged)
Predator and CL did not provide any possible suspects.
Using Code Search for the file, "TextIterator.cpp" assigning to the concern owner.
Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/d909708dbf4f72ab2cc60b3021832aeaa22c0580

@timav -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

Comment 2 by ti...@chromium.org, May 3 2017 

I was able to reproduce with content_shell on Linux. Got

[1:1:0503/115819.551640:1998824677082:FATAL:CompositeEditCommand.cpp(1472)] Check failed: destination.DeepEquivalent().IsConnected(). SELECT class="CLASS2"@afterAnchor/TextAffinity::Downstream

After I removed DCHECKs eventually I get the null |end_container| in   TextIteratorAlgorithm<Strategy>::Initialize()
https://cs.chromium.org/chromium/src/third_party/WebKit/Source/core/editing/iterators/TextIterator.cpp?rcl=f7c0e7db6402fdb3ca65b7e6ffa44989ee056c13&l=245

and the crash.

Comment 3 by ti...@chromium.org, May 3 2017

Cc: -msrchandra@chromium.org ti...@chromium.org yosin@chromium.org
Owner: msrchandra@chromium.org
I reverted my CL and got the same behavior. So probably it is not it.

Comment 4 by msrchandra@chromium.org, May 12 2017

Cc: msrchandra@chromium.org
Owner: ----
Status: Untriaged (was: Assigned)
Re-doing the task as there is no regression issue, will update once the regression range is fetched.
Thank You.
Project Member

Comment 5 by ClusterFuzz, Jun 11 2017

Status: WontFix (was: Untriaged)
ClusterFuzz testcase 6107450209206272 is flaky and no longer reproduces, so closing issue.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.
►

Sign in to add a comment