If you check in your syslog (or console), you will probably see a message telling you that build_udp_raw() has performed an 'backwards memcpy' which is not allowed because the result is undefined, therefore we check for this and then log + abort.
this code should be using memmove(). Rafael Sadowski <raf...@sizeofvoid.org> wrote: > I stumbled across the following. Maybe only our nmap port is broken. > > $ doas nmap -vvv -sU -sT google.de > Starting Nmap 7.91 ( https://nmap.org ) at 2023-11-16 21:28 CET > Warning: Hostname google.de resolves to 2 IPs. Using 142.250.74.195. > Initiating Ping Scan at 21:28 > Scanning google.de (142.250.74.195) [4 ports] > sendto in send_ip_packet_sd: sendto(4, packet, 40, 0, 142.250.74.195, 16) => > Permission denied > Offending packet: TCP 10.0.23.5:58160 > 142.250.74.195:80 A ttl=39 id=51533 > iplen=40 seq=0 win=1024 > Completed Ping Scan at 21:28, 0.01s elapsed (1 total hosts) > Initiating Parallel DNS resolution of 1 host. at 21:28 > Completed Parallel DNS resolution of 1 host. at 21:28, 0.00s elapsed > DNS resolution of 1 IPs took 0.01s. Mode: Async [#: 1, OK: 1, NX: 0, DR: 0, > SF: 0, TR: 1, CN: 0] > Initiating UDP Scan at 21:28 > Scanning google.de (142.250.74.195) [1000 ports] > zsh: abort (core dumped) doas nmap -vvv -sU -sT google.d > > Tested on: > dmesg|head > OpenBSD 7.4-current (GENERIC.MP) #16: Fri Nov 3 21:38:55 MDT 2023 > dera...@arm64.openbsd.org:/usr/src/sys/arch/arm64/compile/GENERIC.MP > real mem = 8432713728 (8042MB) > avail mem = 8137003008 (7760MB) > random: good seed from bootblocks > mainbus0 at root: Raspberry Pi 4 Model B Rev 1.4 > psci0 at mainbus0: PSCI 1.1, SMCCC 1.2 > efi0 at mainbus0: UEFI 2.7 > efi0: https://github.com/pftf/RPi4 rev 0x10000 > smbios0 at efi0: SMBIOS 3.3.0 > > and > > OpenBSD 7.4-current (GENERIC.MP) #1447: Wed Nov 15 09:56:54 MST 2023 > dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP > real mem = 34026549248 (32450MB) > avail mem = 32975663104 (31448MB) > random: good seed from bootblocks > mpath0 at root > scsibus0 at mpath0: 256 targets > mainbus0 at root > bios0 at mainbus0: SMBIOS rev. 3.4 @ 0x8dfda000 (81 entries) > bios0: vendor LENOVO version "N3AET77W (1.42 )" date 09/21/2023 > > backtrace: > > #1 0x0000010a3cca7262 in _libc_abort () at > /usr/src/lib/libc/stdlib/abort.c:51 > #2 0x0000010a3ccfdda3 in memcpy (dst0=<optimized out>, src0=<optimized out>, > length=<optimized out>) at /usr/src/lib/libc/string/memcpy.c:74 > #3 0x000001078eaf3ddd in build_udp_raw(in_addr const*, in_addr const*, int, > unsigned short, unsigned char, bool, unsigned char*, int, unsigned short, > unsigned short, char const*, unsigned short, unsigned int*) () > #4 0x000001078eadcc3e in sendIPScanProbe(UltraScanInfo*, HostScanStats*, > probespec const*, unsigned char, unsigned char) () > #5 0x000001078ead6601 in ultra_scan(std::__1::vector<Target*, > std::__1::allocator<Target*> >&, scan_lists*, stype, timeout_info*) () > #6 0x000001078eaa5554 in nmap_main(int, char**) () > #7 0x000001078ea7c1a1 in _start () >
