panic: ASan: Invalid access, 64-byte write at 0xfffffe00079e8d80, MallocRedZone(fb) cpuid = 0 time = 1722119929 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056de1650 kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056de17b0 vpanic() at vpanic+0x280/frame 0xfffffe0056de1970 panic() at panic+0xb5/frame 0xfffffe0056de1a40 kasan_report() at kasan_report+0xdf/frame 0xfffffe0056de1b10 kasan_memset() at kasan_memset+0xd1/frame 0xfffffe0056de1b40 explicit_bzero() at explicit_bzero+0x1f/frame 0xfffffe0056de1b60 zfree() at zfree+0x131/frame 0xfffffe0056de1ba0 read_random_uio() at read_random_uio+0x2d2/frame 0xfffffe0056de1bf0 sys_getrandom() at sys_getrandom+0x20a/frame 0xfffffe0056de1d10 amd64_syscall() at amd64_syscall+0x4cb/frame 0xfffffe0056de1f30 fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0056de1f30 --- syscall (563, FreeBSD ELF64, getrandom), rip = 0x82133856a, rsp = 0x8202dd228, rbp = 0x8202dd270 --- KDB: enter: panic [ thread pid 73 tid 100094 ] Stopped at kdb_enter+0x6e: movq $0,0x23db447(%rip) db> serialport: Connected to syzkaller.us-central1-b.ci-freebsd-i386-test-1 port 1 (session ID: 58626199fb26e902f11f3b79d8b42588706aabd7fbe8299f678cf52cf210dea6, active connections: 1).