Re: [PATCH v2] sanitize task->comm to avoid leaking escape codes

From: Steve Grubb
Date: Tue Jun 29 2010 - 20:25:17 EST

On Tuesday, June 29, 2010 08:16:08 pm KOSAKI Motohiro wrote:
> > For the audit system, we want the real, unsanitized task->comm. We record
> > it in a special format to the audit logs such that unprintable
> > characters are included. We want it exactly this way for certification
> > purposes as well as forensic evidence if someone was playing games. If
> > you do sanitize it for other areas of the kernel, please give us a way
> > to get the unsanitized text.
> Probably this mail is offtopic. I think audit is unrelated with this
> discusstion. because when forensic, admins shouldn't believe task->comm
> at all. because 1) no path information, perhaps "ls" might mean
> "/home/attackers-dir/evil-script/ls" 2) easily obscured by
> prctl(PR_SET_NAME).

No, its on-topic and we want that information unchanged.

> That said, audit have to logged following two point if task name is
> necessary. 1) exec
> 2) prctl(PRT_SET_NAME)
> Thought ?

The audit system is capable of grabbing that information, too.

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