Messages in this thread | | | Date | Thu, 30 Jul 1998 12:30:49 +1200 | From | Chris Wedgwood <> | Subject | Re: [PATCH] Security fix for 2.1.111, 2.0.x forwardport |
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On Sun, Jul 26, 1998 at 10:23:14PM +0100, Alan Cox wrote:
> The only other one I can find off hand is the /proc stuff - sitting with > /proc/somepid/file open when the PID is reused.
I've been trying to think of a good way to avoid this - and can't really think of anything terribly useful.
One (ugly hack) that does come to mind though, is, if it is possible to find all files open referencing and inode between (X & Y), then when pid n exits, close any open descriptors associated with inode (n<<16 & 0xFFFF0000).
It would also require revoking an mmap'd pages from /proc/n/mem - but then again, it looks like mmap on /proc/n/mem shouldn't be allowed anyhow.
Feasible?
-cw
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