Howto pass pointer to char parameter to kernel via copy_to_user()

by Danke Xie » Wed, 21 Jul 2010 04:25:56 GMT

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 Hi Dwi,

I couldn't really figure out what is being done in the code. But I
think I noticed a reason why the call might fail (though not 100%
sure). You allocated one byte with kmalloc, which is sizeof(char), but
you would be copying 4 bytes into the area, that is sizeof(tmp). I
think that's why you got a seg fault. Do you think so?



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