Messages in this thread | | | Date | Tue, 17 Jul 2012 09:36:35 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: [PATCH TRIVIAL] mm: Fix build warning in kmem_cache_create() |
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On Mon, 16 Jul 2012, David Rientjes wrote:
> > The kernel cannot check everything and will blow up in unexpected ways if > > someone codes something stupid. There are numerous debugging options that > > need to be switched on to get better debugging information to investigate > > deper. Adding special code to replicate these checks is bad. > > > > Disagree, CONFIG_SLAB does not blow up for a NULL name string and just > corrupts userspace.
Ohh.. So far we only had science fiction. Now kernel fiction.... If you could corrupt userspace using sysfs with a NULL string then you'd first need to fix sysfs support.
And if you really want to be totally safe then I guess you need to audit the kernel and make sure that every core kernel function that takes a string argument does check for it to be NULL just in case.
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