Messages in this thread | | | Date | Tue, 7 Feb 2006 17:43:07 +0000 | From | Russell King <> | Subject | Re: 8250 serial console fixes -- issue |
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On Tue, Feb 07, 2006 at 10:18:04AM +0100, Pavel Machek wrote: > I'm afraid that auditing kernel to never ever print \n from user will > be quite a long job. If I get > > Killed process 1234 > System Halted > due to OOM > > I am going to figure it out no problem, but modems do not have that > kind of abilities...
In that case the problem is unsolvable. What if I named a process
\n+++ATH0\n
? Oh dear, your modem just hung up. Or maybe:
\n+++AT&C0\n
and now your modem always sets DCD active, so even with detection of DCD in the kernel, I can now talk to it via process names after I've forced it to disconnect.
And yes, there's modems out there which accept that and act on the '+++' immediately - no pause after '+++' required.
-- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core - 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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