On Sat, Nov 19, 2016 at 7:57 PM, Jason Gunthorpe
<jgunthorpe@xxxxxxxxxxxxxxxxxxxx> wrote:
> On Fri, Nov 18, 2016 at 09:22:42PM -0500, Valdis.Kletnieks@xxxxxx wrote:
>> On Fri, 18 Nov 2016 12:24:37 +0100, Dmitry Vyukov said:
>> > WARNINGs mean kernel bugs.
>> > The one in ucma_write() points to user programming error
>> > or a malicious attempt. This is not a kernel bug, remove it.
>>
>> > - if (WARN_ON_ONCE(!ib_safe_file_access(filp)))
>> > + if (!ib_safe_file_access(filp))
>> > return -EACCES;
>>
>> In that case, wouldn't this be better?
>>
>> if (!ib_safe_file_access(filp)) {
>> printk_once("Process %d (%s) tried to do something hinky", pid, comm);
>> return _EACCESS;
>> }
>>
>> so the sysadmin becomes aware of the malicious attempt?
>
> Yes please
Mailed v2
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