Fixed heap-buffer-overflow error when decoding variable literal length.

[nmoinvaz]

Heap-buffer-overflow READ 2 · Lizard_decompress_safe

    #0 0x760da0 in MEM_read16 c-blosc2/internal-complibs/lizard-1.0/entropy/mem.h:146:14
    #1 0x760da0 in MEM_readLE16 c-blosc2/internal-complibs/lizard-1.0/entropy/mem.h:226:16
    #2 0x760da0 in MEM_readLE24 c-blosc2/internal-complibs/lizard-1.0/entropy/mem.h:246:12
    #3 0x760da0 in Lizard_decompress_LIZv1 c-blosc2/internal-complibs/lizard-1.0/lizard_decompress_liz.h:70:34
    #4 0x760da0 in Lizard_decompress_generic c-blosc2/internal-complibs/lizard-1.0/lizard_decompress.c:241:19
    #5 0x760da0 in Lizard_decompress_safe c-blosc2/internal-complibs/lizard-1.0/lizard_decompress.c:269:12
    #6 0x5bab43 in lizard_wrap_decompress c-blosc2/blosc/blosc2.c:407:12
    #7 0x5bab43 in blosc_d c-blosc2/blosc/blosc2.c:1118:18
    #8 0x5b098c in serial_blosc c-blosc2/blosc/blosc2.c:1219:16
    #9 0x5b098c in do_job c-blosc2/blosc/blosc2.c:1377:15
    #10 0x5b7389 in blosc_run_decompression_with_context c-blosc2/blosc/blosc2.c:2159:13
    #11 0x5b7d4b in blosc2_decompress c-blosc2/blosc/blosc2.c:2227:12
    #12 0x5613c3 in LLVMFuzzerTestOneInput c-blosc2/tests/fuzz/fuzz_decompress_chunk.c:34:5

SUMMARY: AddressSanitizer: heap-buffer-overflow (/mnt/scratch0/clusterfuzz/bot/builds/clusterfuzz-builds_c-blosc2_c26e8220b80bfc0b5ac207ffcb887c5ee8c63325/revisions/decompress_chunk_fuzzer+0x760da0)

https://oss-fuzz.com/testcase-detail/5137671143555072

Originally submitted to Blosc/c-blosc2#178.

Testcase binary file liz.biz zipped up:
liz.zip

[nmoinvaz]

This has been merged into Blosc/c-blosc2. Original OSS-Fuzz ticket has been marked closed as fixed for 30 days. Any chance on getting this merged upstream?