panic: ASan: Invalid access, 64-byte write at 0xfffffe00079e8ec0, MallocRedZone(fb) cpuid = 1 time = 1722017445 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056de8650 kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056de87b0 vpanic() at vpanic+0x280/frame 0xfffffe0056de8970 panic() at panic+0xb5/frame 0xfffffe0056de8a40 kasan_report() at kasan_report+0xdf/frame 0xfffffe0056de8b10 kasan_memset() at kasan_memset+0xd1/frame 0xfffffe0056de8b40 explicit_bzero() at explicit_bzero+0x1f/frame 0xfffffe0056de8b60 zfree() at zfree+0x131/frame 0xfffffe0056de8ba0 read_random_uio() at read_random_uio+0x2d2/frame 0xfffffe0056de8bf0 sys_getrandom() at sys_getrandom+0x20a/frame 0xfffffe0056de8d10 amd64_syscall() at amd64_syscall+0x4cb/frame 0xfffffe0056de8f30 fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0056de8f30 --- syscall (563, FreeBSD ELF64, getrandom), rip = 0x821c4056a, rsp = 0x82112b348, rbp = 0x82112b390 --- KDB: enter: panic [ thread pid 73 tid 100095 ] Stopped at kdb_enter+0x6e: movq $0,0x23db537(%rip) db> serialport: Connected to syzkaller.us-central1-b.ci-freebsd-main-test-2 port 1 (session ID: 184c3c337b9ea368faf16b5db57d0a54abb889f058d58569bf4c462279b6b87a, active connections: 1).