Messages in this thread |  | | Date | Fri, 25 May 2001 16:07:29 +0200 | From | Andi Kleen <> | Subject | Re: [CHECKER] large stack variables (>=1K) in 2.4.4 and 2.4.4-ac8 |
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On Fri, May 25, 2001 at 04:03:57PM +0200, Oliver Neukum wrote: > > A small overflow of the kernel stack overwrites the struct task at the > > bottom of the stack, recovery is dubious at best because we rely on > > data in struct task. A large overflow of the kernel stack either > > corrupts the storage below this task's stack, which could hit anything, > > or it gets a stack fault. > > Is there a reason for the task structure to be at the bottom rather than the > top of these two pages ?
This way you save one addition for every current access; which adds to quite a few KB over the complete kernel.
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