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Issue metadata

Status: Verified
Owner:
Closed: Jun 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 3
Type: Bug



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Assert in SkLineClipper::IntersectLine

Project Member Reported by ClusterFuzz, Jun 2 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5890518291316736

Fuzzer: libFuzzer_paint_op_buffer_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: Abrt
Crash Address: 0x053900004b09
Crash State:
  sk_abort_no_print
  SkLineClipper::IntersectLine
  SkLineClipper::IntersectLine
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=555638:555648

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5890518291316736

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Jun 2 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, Jun 2 2018

Cc: enne@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.

Comment 3 by enne@chromium.org, Jun 5 2018

Labels: -Pri-1 ClusterFuzz-Ignore Pri-3
Owner: reed@google.com
Status: Assigned (was: Untriaged)
Summary: Assert in SkLineClipper::IntersectLine (was: Abrt in sk_abort_no_print)
Mike: the fuzzer found some values that make SkLineClipper::IntersectLine complain.  It doesn't seem like there's a security issue here, so marking this as a lower priority.  But, it might be something you want to look at.  It's easy to repro.  I wasn't sure who to assign this to, so am sending it your way.  Feel free to close if this is too low priority to fix.

Here's the values for this function:

src[0] = {fX = -4.67746776e+23, fY = -4.18426559e+23}
src[1] = {fX = 9.73221392e+18, fY = 8.70602818e+18}
dst[0] = {fX = 2.86985925e-42, fY = 3.45728357e-41}
dst[1] = {fX = 5.56035231e-42, fY = 3.49988304e-41}

clip = (const SkRect &) @0x7ffff299e2e0: {fLeft = -32767, fTop = -32767, 
  fRight = 32767, fBottom = 32767}

bounds = {fLeft = 32767, fTop = -3.76547836e+11, fRight = 4.20906795e+11, 
  fBottom = 32767}

Project Member

Comment 4 by ClusterFuzz, Jun 6 2018

ClusterFuzz has detected this issue as fixed in range 564660:564675.

Detailed report: https://clusterfuzz.com/testcase?key=5890518291316736

Fuzzer: libFuzzer_paint_op_buffer_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: Abrt
Crash Address: 0x053900004b09
Crash State:
  sk_abort_no_print
  SkLineClipper::IntersectLine
  SkLineClipper::IntersectLine
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=555638:555648
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=564660:564675

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5890518291316736

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, Jun 6 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 5890518291316736 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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