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Compiled in Ubuntu20.04,got global-buffer-overflow in kernel_startup_bootstrap.It should be false positve report. #4

@fatgrass

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@fatgrass

=================================================================
==882421==ERROR: AddressSanitizer: global-buffer-overflow on address 0x0000015021f8 at pc 0x000000f8bb2d bp 0x7fff205d4b60 sp 0x7fff205d4b58
READ of size 4 at 0x0000015021f8 thread T0
#0 0xf8bb2c in startup_entry_cmp /home/test/Downloads/tmp/SockFuzzer-main/build/../third_party/xnu/osfmk/kern/startup.c:259:25
#1 0x50af5b in qsort (/home/test/Downloads/SockFuzzer-main/build/net_fuzzer+0x50af5b)
#2 0xf8bc01 in kernel_startup_bootstrap /home/test/Downloads/tmp/SockFuzzer-main/build/../third_party/xnu/osfmk/kern/startup.c:287:2
#3 0xd1f082 in initialize_network /home/test/Downloads/tmp/SockFuzzer-main/build/../fuzz/api/backend.c:143:3
#4 0xd3446a in TestOneProtoInput(Session const&) /home/test/Downloads/tmp/SockFuzzer-main/build/../fuzz/net_fuzzer.cc:670:5
#5 0xd33a88 in LLVMFuzzerTestOneInput /home/test/Downloads/tmp/SockFuzzer-main/build/../fuzz/net_fuzzer.cc:665:1
#6 0x464961 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/home/test/Downloads/SockFuzzer-main/build/net_fuzzer+0x464961)
#7 0x46669a in fuzzer::Fuzzer::ReadAndExecuteSeedCorpora(std::__Fuzzer::vector<fuzzer::SizedFile, fuzzer::fuzzer_allocatorfuzzer::SizedFile >&) (/home/test/Downloads/SockFuzzer-main/build/net_fuzzer+0x46669a)
#8 0x466d29 in fuzzer::Fuzzer::Loop(std::__Fuzzer::vector<fuzzer::SizedFile, fuzzer::fuzzer_allocatorfuzzer::SizedFile >&) (/home/test/Downloads/SockFuzzer-main/build/net_fuzzer+0x466d29)
#9 0x4559fe in fuzzer::FuzzerDriver(int*, char***, int ()(unsigned char const, unsigned long)) (/home/test/Downloads/SockFuzzer-main/build/net_fuzzer+0x4559fe)
#10 0x47e842 in main (/home/test/Downloads/SockFuzzer-main/build/net_fuzzer+0x47e842)
#11 0x7fb5fdf960b2 in __libc_start_main /build/glibc-sMfBJT/glibc-2.31/csu/../csu/libc-start.c:308:16
#12 0x42a79d in _start (/home/test/Downloads/SockFuzzer-main/build/net_fuzzer+0x42a79d)

0x0000015021f8 is located 40 bytes to the left of global variable '__startup_LOCKS_EARLY_entry_lck_grp_startup_init_133' defined in '../third_party/xnu/bsd/kern/kern_control.c:133:8' (0x1502220) of size 24
0x0000015021f8 is located 0 bytes to the right of global variable '__startup_LOCKS_EARLY_entry_lck_attr_startup_init_132' defined in '../third_party/xnu/bsd/kern/kern_control.c:132:8' (0x15021e0) of size 24
SUMMARY: AddressSanitizer: global-buffer-overflow /home/test/Downloads/tmp/SockFuzzer-main/build/../third_party/xnu/osfmk/kern/startup.c:259:25 in startup_entry_cmp
Shadow bytes around the buggy address:
0x0000802983e0: f9 f9 f9 f9 00 00 00 f9 f9 f9 f9 f9 06 f9 f9 f9
0x0000802983f0: f9 f9 f9 f9 00 00 00 f9 f9 f9 f9 f9 00 03 f9 f9
0x000080298400: f9 f9 f9 f9 00 00 00 f9 f9 f9 f9 f9 00 04 f9 f9
0x000080298410: f9 f9 f9 f9 00 00 00 f9 f9 f9 f9 f9 00 03 f9 f9
0x000080298420: f9 f9 f9 f9 00 00 00 f9 f9 f9 f9 f9 03 f9 f9 f9
=>0x000080298430: f9 f9 f9 f9 00 00 00 f9 f9 f9 f9 f9 00 00 00[f9]
0x000080298440: f9 f9 f9 f9 00 00 00 f9 f9 f9 f9 f9 00 00 00 f9
0x000080298450: f9 f9 f9 f9 00 00 00 f9 f9 f9 f9 f9 00 00 00 f9
0x000080298460: f9 f9 f9 f9 00 00 00 f9 f9 f9 f9 f9 00 00 00 f9
0x000080298470: f9 f9 f9 f9 00 00 00 f9 f9 f9 f9 f9 00 00 00 f9
0x000080298480: f9 f9 f9 f9 00 00 00 f9 f9 f9 f9 f9 00 00 00 f9
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==882421==ABORTING
MS: 0 ; base unit: 0000000000000000000000000000000000000000

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