linux-kernel - Re: [PATCH 01/05] use proc_dointvec_minmax to check boundaries while needed

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Date:	Fri, 4 Mar 2011 09:41:59 +0800
From:	Dave Young <hidave.darkstar@...il.com>
To:	Don Zickus <dzickus@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/05] use proc_dointvec_minmax to check boundaries while needed

On Thu, Mar 3, 2011 at 10:59 PM, Don Zickus <dzickus@...hat.com> wrote:
> On Thu, Mar 03, 2011 at 09:58:20PM +0800, Dave Young wrote:
>> proc_dointvec doesn't check extra minmax params, use proc_dointvec_minmax
>> instead of proc_dointvec for cases need boundaries check.
>
> Is this patch needed, if you are basically changing it again in patches 3
> and 5?

Sure if 3 and 5 is acked, if someone object them then this is good?

>
> Cheers,
> Don
>
>>
>> Signed-off-by: Dave Young <hidave.darkstar@...il.com>
>> ---
>>  kernel/sysctl.c |   12 ++++++------
>>  1 file changed, 6 insertions(+), 6 deletions(-)
>>
>> --- linux-2.6.orig/kernel/sysctl.c    2011-03-03 10:44:53.000000000 +0800
>> +++ linux-2.6/kernel/sysctl.c 2011-03-03 11:02:43.736663258 +0800
>> @@ -374,7 +374,7 @@ static struct ctl_table kern_table[] = {
>>               .data           = &sysctl_sched_autogroup_enabled,
>>               .maxlen         = sizeof(unsigned int),
>>               .mode           = 0644,
>> -             .proc_handler   = proc_dointvec,
>> +             .proc_handler   = proc_dointvec_minmax,
>>               .extra1         = &zero,
>>               .extra2         = &one,
>>       },
>> @@ -1204,7 +1204,7 @@ static struct ctl_table vm_table[] = {
>>               .data           = &block_dump,
>>               .maxlen         = sizeof(block_dump),
>>               .mode           = 0644,
>> -             .proc_handler   = proc_dointvec,
>> +             .proc_handler   = proc_dointvec_minmax,
>>               .extra1         = &zero,
>>       },
>>       {
>> @@ -1212,7 +1212,7 @@ static struct ctl_table vm_table[] = {
>>               .data           = &sysctl_vfs_cache_pressure,
>>               .maxlen         = sizeof(sysctl_vfs_cache_pressure),
>>               .mode           = 0644,
>> -             .proc_handler   = proc_dointvec,
>> +             .proc_handler   = proc_dointvec_minmax,
>>               .extra1         = &zero,
>>       },
>>  #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
>> @@ -1221,7 +1221,7 @@ static struct ctl_table vm_table[] = {
>>               .data           = &sysctl_legacy_va_layout,
>>               .maxlen         = sizeof(sysctl_legacy_va_layout),
>>               .mode           = 0644,
>> -             .proc_handler   = proc_dointvec,
>> +             .proc_handler   = proc_dointvec_minmax,
>>               .extra1         = &zero,
>>       },
>>  #endif
>> @@ -1231,7 +1231,7 @@ static struct ctl_table vm_table[] = {
>>               .data           = &zone_reclaim_mode,
>>               .maxlen         = sizeof(zone_reclaim_mode),
>>               .mode           = 0644,
>> -             .proc_handler   = proc_dointvec,
>> +             .proc_handler   = proc_dointvec_minmax,
>>               .extra1         = &zero,
>>       },
>>       {
>> @@ -1287,7 +1287,7 @@ static struct ctl_table vm_table[] = {
>>               .data           = &vdso_enabled,
>>               .maxlen         = sizeof(vdso_enabled),
>>               .mode           = 0644,
>> -             .proc_handler   = proc_dointvec,
>> +             .proc_handler   = proc_dointvec_minmax,
>>               .extra1         = &zero,
>>       },
>>  #endif
>



-- 
Regards
dave