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

Issue 847678 link

Starred by 1 user

Issue metadata

Status: WontFix
Owner: ----
Closed: Sep 5
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug-Regression



Sign in to add a comment

Null-dereference READ in _IO_wdefault_xsputn

Project Member Reported by ClusterFuzz, May 30 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5562318130511872

Fuzzer: libFuzzer_pdfium_xfa_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  _IO_wdefault_xsputn
  vfwprintf
  vswprintf
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=562400:562409

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5562318130511872

Issue filed automatically.

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

Comment 1 by ClusterFuzz, May 30 2018

Cc: dsinclair@chromium.org
Labels: ClusterFuzz-Auto-CC
Automatically adding ccs based on OWNERS file / target commit history.

If this is incorrect, please add ClusterFuzz-Wrong label.
Cc: -dsinclair@chromium.org brajkumar@chromium.org
Components: Internals>Plugins>PDF
Labels: -Type-Bug M-69 Test-Predator-Wrong Type-Bug-Regression
Owner: dsinclair@chromium.org
Status: Assigned (was: Untriaged)
This issue looks similar to  bug 842529 , hence assigning to the same owner for more updates.

dsinclair@ Could you please take a look in to this issue?

Thanks!
Cc: tsepez@chromium.org
Project Member

Comment 4 by ClusterFuzz, May 31 2018

ClusterFuzz has detected this issue as fixed in range 563014:563041.

Detailed report: https://clusterfuzz.com/testcase?key=5562318130511872

Fuzzer: libFuzzer_pdfium_xfa_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  _IO_wdefault_xsputn
  vfwprintf
  vswprintf
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=562400:562409
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=563014:563041

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5562318130511872

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 5 by ClusterFuzz, May 31 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 5562318130511872 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.
Status: Unconfirmed (was: Verified)
I suspect CF is being flaky and this will just crop up again as a different bug.
Status: Assigned (was: Unconfirmed)
Owner: ----
Status: Untriaged (was: Assigned)
Setting PDF bugs assigned to me back to untriaged so they can get re-assigned as needed.
Project Member

Comment 9 by ClusterFuzz, Sep 5

Labels: -Reproducible Unreproducible
ClusterFuzz testcase 5562318130511872 appears to be flaky, updating reproducibility label.
Project Member

Comment 10 by ClusterFuzz, Sep 5

Status: WontFix (was: Untriaged)
ClusterFuzz testcase 5562318130511872 is flaky and no longer crashes, so closing issue.

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

Sign in to add a comment