panic: ASan: Invalid access, 64-byte write at 0xfffffe00595ab480, MallocRedZone(fb) cpuid = 0 time = 1722269360 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056f15650 kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056f157b0 vpanic() at vpanic+0x280/frame 0xfffffe0056f15970 panic() at panic+0xb5/frame 0xfffffe0056f15a40 kasan_report() at kasan_report+0xdf/frame 0xfffffe0056f15b10 kasan_memset() at kasan_memset+0xd1/frame 0xfffffe0056f15b40 explicit_bzero() at explicit_bzero+0x1f/frame 0xfffffe0056f15b60 zfree() at zfree+0x131/frame 0xfffffe0056f15ba0 read_random_uio() at read_randoserialport: Connected to syzkaller.us-central1-b.ci-freebsd-i386-test-2 port 1 (session ID: 058971e82e445770beed6ef6addf6edefbcfcbf743988eac009aba6843dda5f0, active connections: 1). m_uio+0x2d2/frame 0xfffffe0056f15bf0 sys_getrandom() at sys_getrandom+0x20a/frame 0xfffffe0056f15d10 amd64_syscall() at amd64_syscall+0x4cb/frame 0xfffffe0056f15f30 fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0056f15f30 --- syscall (563, FreeBSD ELF64, getrandom), rip = 0x82177456a, rsp = 0x820204d78, rbp = 0x820204dc0 --- KDB: enter: panic [ thread pid 73 tid 100098 ] Stopped at kdb_enter+0x6e: movq $0,0x23dc0a7(%rip) db>