Messages in this thread |  | | Date | Fri, 2 Nov 2001 15:16:09 +0200 (EET) | From | lkml user <> | Subject | Re: null pointer questions |
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On Fri, 2 Nov 2001, Roman Zippel wrote:
> Hi, > > On Thu, 1 Nov 2001, Ken Ashcraft wrote: > > > 1. If I pass size 0 to kmalloc, what does it return? > > AFAIK size is always rounded up, so you get the smallest possible > allocation unit. > > > 2. What happens if I pass a null pointer as the destination parameter > > to copy_from_user? Does copy_from_user handle it safely or will the > > kernel seg fault? > > The kernel won't crash, but it might fail (depending on whether 0 is a > valid user space address or not). > > bye, Roman > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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