Re: only root has acces to /dev/mem ?

Alan Cox (alan@lxorguk.ukuu.org.uk)
Mon, 13 Sep 1999 21:29:25 +0100 (BST)

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> sine i am using 2.2.12 i had no permissions to write on /dev/mem
> i belong to the group kmem who has +rw on it i cann't write
> when i chown it the user cann't still write on it
> only root can??
> was it a security bug or so??

Tightening rather than anything else. You need the RAWIO capability to use
/dev/mem or /dev/kmem. You can drop all other capabilities

Alan

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