This is xnu-8019. See this file in:
Directory listing for xnu-8019//san/memory
Makefile
kasan-arm64.c
kasan-blacklist
kasan-blacklist-arm64
kasan-blacklist-dynamic
kasan-blacklist-x86_64
kasan-classic-arm64.h
kasan-classic.c
kasan-classic.h
kasan-fakestack.c
kasan-helper.c
kasan-memintrinsics.c
kasan-report.c
kasan-tbi-arm64.h
kasan-tbi.c
kasan-tbi.h
kasan-test-arm64.s
kasan-test-x86_64.s
kasan-test.c
kasan-x86_64.c
kasan.c
kasan.h
kasan_dynamic_blacklist.c
kasan_internal.h
memintrinsics.h
ubsan-blacklist
ubsan.c
ubsan.h
ubsan_log.c
ubsan_minimal.c
ubsan_minimal.h