OSV-2020-227 Heap-double-free in spng__free

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22720 Crash type: Heap-double-free Crash state: spngfree spnginflatestream readnonidatchunks...

OSV-2020-114 Use-of-uninitialized-value in read_non_idat_chunks

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22646 Crash type: Use-of-uninitialized-value Crash state: readnonidatchunks readchunks spnggetplte...

OSV-2020-79 Use-of-uninitialized-value in check_exif

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22714 Crash type: Use-of-uninitialized-value Crash state: checkexif readnonidatchunks readchunks...