Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique Reachable Functions	All non-covered Complexity	All Reachable Complexity	Function Name	Function Callsite	Blocked Branch
None	6	6	_realloc	call site: 00000	/src/libwebsockets/lib/core/alloc.c:140
None	4	173	lws_api_test_gunzip(FuzzedDataProvider&)	call site: 00000	/src/libwebsockets/lws_upng_inflate_fuzzer.cpp:28
None	2	17	__lws_logv	call site: 00005	/src/libwebsockets/lib/core/logs.c:384
None	2	2	_realloc	call site: 00000	/src/libwebsockets/lib/core/alloc.c:154
None	0	501	_lws_upng_inflate_data	call site: 00033	/src/libwebsockets/lib/misc/upng-gzip.c:438
None	0	501	_lws_upng_inflate_data	call site: 00064	/src/libwebsockets/lib/misc/upng-gzip.c:764
None	0	501	_lws_upng_inflate_data	call site: 00065	/src/libwebsockets/lib/misc/upng-gzip.c:768
None	0	501	_lws_upng_inflate_data	call site: 00065	/src/libwebsockets/lib/misc/upng-gzip.c:788
None	0	41	lws_upng_inflator_create	call site: 00003	/src/libwebsockets/lib/misc/upng-gzip.c:974
None	0	37	_lws_upng_inflate_data	call site: 00062	/src/libwebsockets/lib/misc/upng-gzip.c:733
None	0	0	lws_snprintf	call site: 00011	/src/libwebsockets/lib/core/libwebsockets.c:870
None	0	0	lws_snprintf	call site: 00012	/src/libwebsockets/lib/core/libwebsockets.c:877

Fuzzer calltree


         LLVMFuzzerTestOneInput

[function] [call site] 00000


           lws_api_test_gunzip(FuzzedDataProvider&)

[function] [call site] 00001


             lws_upng_inflator_create

[function] [call site] 00002


               lws_zalloc

[function] [call site] 00003


               _lws_log

[function] [call site] 00004


                 __lws_logv

[function] [call site] 00005


                   lws_strncpy

[function] [call site] 00006


                     strncpy

[call site] 00007


                   lwsl_timestamp

[function] [call site] 00008


                     gettimeofday

[call site] 00009


                     localtime_r

[call site] 00010


                     lws_snprintf

[function] [call site] 00011


                       vsnprintf

[call site] 00012


                     lws_snprintf

[function] [call site] 00013


                   strlen

[call site] 00014


                   lws_snprintf

[function] [call site] 00015


                   vsnprintf

[call site] 00016


               lws_realloc

[function] [call site] 00017


               _lws_log

[function] [call site] 00018


               lws_realloc

[function] [call site] 00019


             std::__cxx11::basic_string
             
              , std::allocator
              
               >::~basic_string()

[call site] 00020


             lws_upng_inflate_data

[function] [call site] 00021


               _lws_upng_inflate_data

[function] [call site] 00022


                 read_bit

[function] [call site] 00023


                 read_bit

[function] [call site] 00024


                 read_bit

[function] [call site] 00025


                 _lws_log

[function] [call site] 00026


                 _lws_log

[function] [call site] 00027


                 read_byte

[function] [call site] 00028


                 read_byte

[function] [call site] 00029


                 read_byte

[function] [call site] 00030


                 read_byte

[function] [call site] 00031


                 _lws_log

[function] [call site] 00032


                 read_byte

[function] [call site] 00033


                 huffman_tree_init

[function] [call site] 00034


                 huffman_tree_init

[function] [call site] 00035


                 _lws_log

[function] [call site] 00036


                 huffman_tree_init

[function] [call site] 00037


                 huffman_tree_init

[function] [call site] 00038


                 huffman_tree_init

[function] [call site] 00039


                 read_bits

[function] [call site] 00040


                   read_bit

[function] [call site] 00041


                 read_bits

[function] [call site] 00042


                 read_bits

[function] [call site] 00043


                 read_bits

[function] [call site] 00044


                 huffman_tree_create_lengths

[function] [call site] 00045


                   __assert_fail

[call site] 00046


                   __assert_fail

[call site] 00047


                   __assert_fail

[call site] 00048


                   __assert_fail

[call site] 00049


                 huffman_tree_create_lengths

[function] [call site] 00050


                 huffman_tree_create_lengths

[function] [call site] 00051


                 huffman_decode_symbol

[function] [call site] 00052


                   read_bit

[function] [call site] 00053


                 read_bits

[function] [call site] 00054


                 read_bits

[function] [call site] 00055


                 read_bits

[function] [call site] 00056


                 _lws_log

[function] [call site] 00057


                 huffman_decode_symbol

[function] [call site] 00058


                 read_bits

[function] [call site] 00059


                 huffman_decode_symbol

[function] [call site] 00060


                 _lws_log

[function] [call site] 00061


                 read_bits

[function] [call site] 00062


                 _lws_log

[function] [call site] 00063


                 __assert_fail

[call site] 00064


                 _lws_log

[function] [call site] 00065


                 read_byte

[function] [call site] 00066


                 read_byte

[function] [call site] 00067


                 read_byte

[function] [call site] 00068


                 read_byte

[function] [call site] 00069


                 read_byte

[function] [call site] 00070


                 read_byte

[function] [call site] 00071


                 read_byte

[function] [call site] 00072


                 read_byte

[function] [call site] 00073


                 read_byte

[function] [call site] 00074


                 read_byte

[function] [call site] 00075


                 read_byte

[function] [call site] 00076


             lws_upng_inflator_destroy

[function] [call site] 00077


               lws_realloc

[function] [call site] 00078


               lws_realloc

[function] [call site] 00079