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Issue 918141 link

Starred by 2 users
Status: Assigned
Owner:
thestig@chromium.org
Cc:
kkaluri@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 2
Type: Bug



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Integer-overflow in sfntly::IndexSubTableFormat2::Builder::GlyphStartOffset

Project Member Reported by ClusterFuzz, Dec 28 
Detailed report: https://clusterfuzz.com/testcase?key=6549371591852032

Fuzzer: libFuzzer_sfntly_fuzzer
Fuzz target binary: sfntly_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  sfntly::IndexSubTableFormat2::Builder::GlyphStartOffset
  sfntly::IndexSubTable::Builder::GlyphInfo
  InitializeBitmapBuilder
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=464668:464680

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6549371591852032

Issue filed automatically.

See https://github.com/google/clusterfuzz-tools for instructions to reproduce this bug locally.
Project Member

Comment 1 by ClusterFuzz, Dec 28

Cc: thestig@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 2 by kkaluri@chromium.org, Jan 2

Cc: kkaluri@chromium.org
Labels: M-72 Test-Predator-Wrong CF-NeedsTriage
Unable to provide possible suspect using Predator, CL and Code Search.
Could someone please look into the issue.

Thank You...

Comment 3 by thestig@chromium.org, Jan 7

Cc: -thestig@chromium.org
Components: Internals>Skia>PDF
Owner: thestig@chromium.org
Status: Assigned (was: Untriaged)
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