Messages in this thread | | | Date | Fri, 25 May 2001 08:11:07 +0100 | From | David Welch <> | 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 03:20:20PM +1000, Keith Owens wrote: > > >> On a side note, does anyone know if the kernel does checking if the > >> stack overflowed at any time? > > > >You normally get a silent hang or worse a stack fault exception > >(which linux/x86 without kdb cannot recover from) which gives you instant > >reboot. > > You cannot recover from a kernel stack overflow even with kdb. The > exception handler and kdb use the stack that just overflowed. > Why not use a task gate for the double fault handler points to a per-processor TSS with a seperate stack. This would allow limited recovery from a kernel stack overlay. - 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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