Messages in this thread | | | From | Jiasheng Jiang <> | Subject | Re: Re: Re: [PATCH v3] serial: pch_uart: potential dereference of null pointer | Date | Thu, 16 Dec 2021 23:41:13 +0800 |
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On Thu, Dec 16, 2021 at 11:24:36PM +0800, Greg KH wrote: > Did you run the kernel before your change and then after your change to > ensure that the failure you saw before your change is now properly > fixed? > > How did you test this?
Thank you for your answer. But I haven't run it yet. And in fact I don't know how to trigger the alloc failure. I just find the other place like eni_init_one() in `drivers/atm/eni.c` check the return value of the dma_alloc_coherent(). So that's possible to alloc failure. Therefore, in order to avoid the dereference of the null pointer, it might be better to deal with it.
Sincerely thanks,
jiasheng jiang
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