imagemagick/encoder_heic_fuzzer: Heap-buffer-overflow in ref_pic_set::compute_derived_values

Project:
https://github.com/imagemagick/imagemagick.git

Detailed report: https://oss-fuzz.com/testcase?key=5831210287759360

Project: imagemagick
Fuzzer: afl_imagemagick_encoder_heic_fuzzer
Fuzz target binary: encoder_heic_fuzzer
Job Type: afl_asan_imagemagick
Platform Id: linux

Crash Type: Heap-buffer-overflow READ 1
Crash Address: 0x62300000199c
Crash State:
ref_pic_set::compute_derived_values
read_short_term_ref_pic_set
seq_parameter_set::read

Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=afl_asan_imagemagick&range=201803230437:201804010434

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5831210287759360

Issue filed automatically.

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for more information.

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