netdev - Re: dropwatch for network drop monitor

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Fri, 17 Apr 2009 20:13:58 +0200
From:	Oliver Hartkopp <oliver@...tkopp.net>
To:	Neil Horman <nhorman@...driver.com>
CC:	netdev@...r.kernel.org
Subject: Re: dropwatch for network drop monitor

Neil Horman wrote:

> 
> Quick update for you, I've reproduced the problem.  The inability to restart
> after the first few errors is actually by design.  Since you had to kill the
> user space process, it left the kernel bits in a state where they were still
> monitoring, so a second start command (when you restarted the user space daemon)
> caused an error, and the program shutdown (which I probably shouldn't do,
> returning instead to the command console).  You can work around this by issuing
> a stop command, which successfully stops the kernel bits and lets you restart
> them.

Hard terminations are mostly critical to handle. I'll try the workaround.

> 
> This also tells me that the kernel netlink warning is not fatal (as our netlink
> message commands are getting processed properly).  I still need to figure out
> why thats happening though.
> 

Ok.

> As for the ctrl-c issue, I've got no idea whats going on there, its like the
> recv operation is restarting after we catch the SIGINT.  I think I may just
> switch that to a poll operation on the netlink socket and stdin input.  That
> should fix that up quick.  Expect a git commit on that sometime this weekend,
> and some subseqent netdev posts to fix the kernel bits. 

You can also send me an off-list mail when you have something to test this
weekend.

I can produce a lot of drops on my machine ;-)

Regards,
Oliver

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html