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Issue metadata

Status: Verified
Owner:
Closed: May 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Mac
Pri: 2
Type: Bug



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Null-dereference READ in SkImage::width

Project Member Reported by ClusterFuzz, Jan 20 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=4958725097127936

Fuzzer: libFuzzer_paint_op_buffer_eq_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x00000000000c
Crash State:
  SkImage::width
  cc::CreateDrawImage
  cc::DrawImageRectOp::Serialize
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=529167:529168

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4958725097127936

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Jan 20 2018

Components: Internals>Skia
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 ClusterFuzz, Jan 20 2018

Labels: Test-Predator-Auto-Owner
Owner: dominickn@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/5cb9e8d52ba6f729e36c4ab3447c4a76ad250832 (Allow site settings to query favicons by host name.).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.
Project Member

Comment 3 by ClusterFuzz, Jan 21 2018

Labels: OS-Mac
Cc: mmoroz@chromium.org och...@chromium.org
Owner: infe...@chromium.org
My CL doesn't touch CC or Skia, and I'm having a very hard time working out why this fuzzer would have tripped when it doesn't actually run any of the code I changed. Over to the ClusterFuzz folks.

Comment 5 by och...@chromium.org, Jan 22 2018

Labels: Test-Predator-Wrong-CLs
Cc: -mmoroz@chromium.org -och...@chromium.org vmp...@chromium.org
Components: -Internals>Skia Blink>Paint
Owner: enne@chromium.org
enne@, vmpstr@ - can you please help to triage.
Components: -Blink>Paint Internals>Compositing

Comment 8 by enne@chromium.org, Jan 25 2018

Cc: khushals...@chromium.org ericrk@chromium.org
Labels: -Pri-1 Pri-2
ericrk: Do you think we need a fake transfer cache that always generates an image no matter what entry you ask for? Or should we just skip images in the equality fuzzer?

Comment 9 by enne@chromium.org, Feb 21 2018

Components: -Internals>Compositing Internals>Compositing>OOP-Raster
Project Member

Comment 10 by ClusterFuzz, May 3 2018

ClusterFuzz has detected this issue as fixed in range 555636:555647.

Detailed report: https://clusterfuzz.com/testcase?key=4958725097127936

Fuzzer: libFuzzer_paint_op_buffer_eq_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x00000000000c
Crash State:
  SkImage::width
  cc::CreateDrawImage
  cc::DrawImageRectOp::Serialize
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=529167:529168
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=555636:555647

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4958725097127936

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 11 by ClusterFuzz, May 3 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 4958725097127936 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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