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  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 4 Oct 2007 08:54:40 -0700
From:	Stephen Hemminger <>
To:	Daniel Drake <>
Subject: Re: [PATCH] mac80211: Fix TX after monitor interface is converted
 to managed

On Thu,  4 Oct 2007 12:33:43 +0100 (BST)
Daniel Drake <> wrote:

> This sequence of events causes loss of connectivity:
> <plug in>
> <associate as normal in managed mode>
> ifconfig eth7 down
> iwconfig eth7 mode monitor
> ifconfig eth7 up
> ifconfig eth7 down
> iwconfig eth7 mode managed
> <associate as normal>
> At this point you are associated but TX does not work. This is because
> the eth7 hard_start_xmit is still ieee80211_monitor_start_xmit.
> Fix this by unsetting the hard_start_xmit handler in ieee80211_if_reinit. It
> will then be reinitialised to the default (ieee80211_subif_start_xmit) in
> ieee80211_if_set_type.
> Signed-off-by: Daniel Drake <>

Playing with the function pointer is a awkward way to do this.  Shouldn't
the state management flags be used instead (dormant, running, stop/wake)...
I am concerned about races and dereferencing the NULL ptr.

Stephen Hemminger <>
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists