Re: Try/catch for modules?

[Ruben Safir <ruben@mrbrklyn.com>]

you are going to use a try and catch in the kernel?


On 10/17/19 9:42 AM, Maria Neptune wrote:
> On Thu, Oct 17, 2019, 09:42 Maria Neptune <maria.elysse.n@gmail.com> wrote:
> 
>> I hate to say it but honestly in a kernel module, your solution is not to
>> do null dereferences. It's hard but you gotta.
>> Otherwise I've seen quite a bit of error handling done with gotos (if
>> ptr==0 goto error), which I believe compiles to similar code as try/except
>> blocks. Unsure how you'd handle stuff that sends a signal like null
>> dereferences in that way though.
>>
>> On Thu, Oct 17, 2019, 09:37 Martin Galvan <omgalvan.86@gmail.com> wrote:
>>
>>> Hi all,
>>>
>>> I'm writing a kernel module, and am trying to implement some
>>> exception-handling mechanism so that the system won't oops/panic if my
>>> module does e.g. a NULL dereference. The (horribly hackish) way I'm
>>> doing this right now is registering a die_notifier which will set the
>>> 'panic_on_oops' variable to 0 if we detect that the current PID
>>> corresponds to my module. However, this is ugly for many reasons.
>>>
>>> What would be the "standard" way of doing this? Is there something
>>> like Window's try/except blocks, where I can get back control of the
>>> execution flow, without having the process die? I'm aware of
>>> _ASM_EXTABLE, but I understand this only works for a single
>>> instruction and has other limitations.
>>>
>>> _______________________________________________
>>> Kernelnewbies mailing list
>>> Kernelnewbies@kernelnewbies.org
>>> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>>
>>
> 
> 
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