netdev - Re: eth_send of ARP packet returned -1 rather than expected 42

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Date:   Tue, 8 Jan 2019 10:48:34 +0100 (CET)
From:   Marco Berizzi <pupilla@...ero.it>
To:     Ido Schimmel <idosch@...sch.org>
Cc:     netdev@...r.kernel.org
Subject: Re: eth_send of ARP packet returned -1 rather than expected 42

> Not sure it's the same issue, but can you test with commit 6b8d95f1795c
> ("packet: validate address length if non-zero")? It's in mainline
> already and queued for -stable.
> 
> See similar report here:
> https://www.spinics.net/lists/netdev/msg541807.html

Hi,

Thanks for the quick response. Yes indeed the problem is the same.
4.20.1-rc1 is working good again:

root@...imero:~# nmap -v 10.81.104.82
Starting Nmap 7.70 ( https://nmap.org ) at 2019-01-08 10:04 CET
Initiating ARP Ping Scan at 10:04
Scanning 10.81.104.82 [1 port]
Completed ARP Ping Scan at 10:04, 0.02s elapsed (1 total hosts)
Initiating SYN Stealth Scan at 10:04
Scanning ntexve (10.81.104.82) [1000 ports]
Discovered open port 22/tcp on 10.81.104.82
Completed SYN Stealth Scan at 10:04, 0.03s elapsed (1000 total ports)
Nmap scan report for ntexve (10.81.104.82)
Host is up (0.00024s latency).
Not shown: 999 closed ports
PORT   STATE SERVICE
22/tcp open  ssh
MAC Address: 00:19:99:AB:0B:38 (Fujitsu Technology Solutions GmbH)

Read data files from: /usr/bin/../share/nmap
Nmap done: 1 IP address (1 host up) scanned in 0.13 seconds
           Raw packets sent: 1001 (44.028KB) | Rcvd: 1001 (40.032KB)
root@...imero:~# uname -a
Linux Calimero 4.20.1-rc1 #1 SMP Mon Jan 7 17:52:46 CET 2019 x86_64 Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz GenuineIntel GNU/Linux
root@...imero:~#