OSV-2018-414 Use-of-uninitialized-value in jbig2_immediate_generic_region

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9680 Crash type: Use-of-uninitialized-value Crash state: jbig2immediategenericregion jbig2parsesegment jbig2datain...

OSV-2020-161 Heap-use-after-free in jbig2_release_huffman_table

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=21587 Crash type: Heap-use-after-free READ 8 Crash state: jbig2releasehuffmantable jbig2textregion jbig2datain...