linux-kernel - Re: [PATCH] sysctl: Fix ax25 checks

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Message-ID: <47670F90.4020004@ccr.jussieu.fr>
Date:	Tue, 18 Dec 2007 01:08:48 +0100
From:	Bernard Pidoux <pidoux@....jussieu.fr>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Linux Netdev List <netdev@...r.kernel.org>,
	linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] sysctl:  Fix ax25 checks

Eric,

I applied your patch and now I have all /proc/sys/net/ax25
created and initialized as before.

Thanks.

Bernard Pidoux




Eric W. Biederman wrote:
> Bernard Pidoux <pidoux@....jussieu.fr> writes:
> 
>> With 2.6.24-rc5 there is no /proc/net/ax25
> 
> /proc/sys/net/ax25?
> 
>> Here is an extract from dmesg after boot :
> 
> Groan.  I thought I had found the last of the bugs with
> my sysctl sanity checks.  I guess you actually have to
> use ax25 for this bug to show up.
> 
> Thank you for catching this. 
> 
>> =======================
>> sysctl table check failed: /net/ax25/ax0/ax25_default_mode .3.9.1.2 Unknown
>> sysctl binary path
>> Pid: 2936, comm: kissattach Not tainted 2.6.24-rc5 #1
>>  [<c012ca6a>] set_fail+0x3b/0x43
>>  [<c012ce7a>] sysctl_check_table+0x408/0x456
>>  [<c012ce8e>] sysctl_check_table+0x41c/0x456
>>  [<c012ce8e>] sysctl_check_table+0x41c/0x456
>>  [<c02ac64a>] _spin_unlock+0x14/0x1c
>>  [<c012ce8e>] sysctl_check_table+0x41c/0x456
>>  [<c011e681>] sysctl_set_parent+0x19/0x2a
>>  [<c011f55c>] register_sysctl_table+0x45/0x85
>>  [<d8be9d26>] ax25_register_sysctl+0x112/0x11c [ax25]
>>  [<d8be6c76>] ax25_device_event+0x2e/0x90 [ax25]
>>  [<c012c560>] notifier_call_chain+0x2a/0x47
>>  [<c012c59f>] raw_notifier_call_chain+0x17/0x1a
>>  [<c0259290>] dev_open+0x6f/0x75
>>  [<c0257ee7>] dev_change_flags+0x9c/0x148
>>  [<c0256ab3>] __dev_get_by_name+0x68/0x73
>>  [<c0292307>] devinet_ioctl+0x22e/0x53b
>>  [<c0259074>] dev_ioctl+0x472/0x5ba
>>  [<c024d4ba>] sock_ioctl+0x1aa/0x1cf
>>  [<c024d310>] sock_ioctl+0x0/0x1cf
>>  [<c016bc19>] do_ioctl+0x19/0x4c
>>  [<c016be40>] vfs_ioctl+0x1f4/0x20b
>>  [<c0103d01>] sysenter_past_esp+0x9a/0xa9
>>  [<c016be9c>] sys_ioctl+0x45/0x5d
>>  [<c0103cc6>] sysenter_past_esp+0x5f/0xa9
>>  =======================
>> sysctl table check failed: /net/ax25/ax0/backoff_type .3.9.1.3 Unknown sysctl
>> binary path
>> (...) truncated
>>  =======================
>> sysctl table check failed: /net/ax25/ax0/connect_mode .3.9.1.4 Unknown sysctl
>> binary path
>> (...)
>>  =======================
>> sysctl table check failed: /net/ax25/ax0/standard_window_size .3.9.1.5 Unknown
>> sysctl binary path
>>  =======================
>> (...)
>>
>> and so on ...
>>
> 
> Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>
> ---
>  kernel/sysctl_check.c |    7 ++++++-
>  1 files changed, 6 insertions(+), 1 deletions(-)
> 
> diff --git a/kernel/sysctl_check.c b/kernel/sysctl_check.c
> index bed939f..a68425a 100644
> --- a/kernel/sysctl_check.c
> +++ b/kernel/sysctl_check.c
> @@ -428,7 +428,7 @@ static struct trans_ctl_table trans_net_netrom_table[] = {
>  	{}
>  };
>  
> -static struct trans_ctl_table trans_net_ax25_table[] = {
> +static struct trans_ctl_table trans_net_ax25_param_table[] = {
>  	{ NET_AX25_IP_DEFAULT_MODE,	"ip_default_mode" },
>  	{ NET_AX25_DEFAULT_MODE,	"ax25_default_mode" },
>  	{ NET_AX25_BACKOFF_TYPE,	"backoff_type" },
> @@ -446,6 +446,11 @@ static struct trans_ctl_table trans_net_ax25_table[] = {
>  	{}
>  };
>  
> +static struct trans_ctl_table trans_net_ax25_table[] = {
> +	{ 0, NULL, trans_net_ax25_param_table },
> +	{}
> +};
> +
>  static struct trans_ctl_table trans_net_bridge_table[] = {
>  	{ NET_BRIDGE_NF_CALL_ARPTABLES,		"bridge-nf-call-arptables" },
>  	{ NET_BRIDGE_NF_CALL_IPTABLES,		"bridge-nf-call-iptables" },
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