Re: [PATCH 2.4] usb serial write fix

[Paul Fulghum]

On Tue, 2004-11-02 at 08:03, Paul Fulghum wrote:
> On Mon, 2004-11-01 at 21:36, Pete Zaitcev wrote:
> > Why testing for signals? Do you expect any?
> 
> post_helper can run in a user process as well
> as keventd. The user process can get a signal
> like HUP to pppd.

This brings up a question.

post_helper is using a single list to queue
write requests from all user processes.

A write request on the list can be processed
in a user process different than the submitting process.

Signals sent to one user process can interfere with
the processing of write requests from a different process.

Is this not a security problem?

-- 
Paul Fulghum
paulkf@xxxxxxxxxxxxx

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