sysfs patches in -mm create bad permissions

From: Adrian Bridgett (adrian_at_smop.co.uk)
Date: 08/09/04

  • Next message: Andrew Morton: "Re: -mm swsusp: fix highmem handling" 
    Date:	Mon, 9 Aug 2004 22:45:33 +0100
To: linux-kernel@vger.kernel.org

    Thanks to GregKH for looking at this too.

    Odd one this. It seems like whoever looks at some files in /sys first, owns
    them. e.g I just created a new user fred, rebooted. Then "find /sys -user
    fred" shows loads of files. Permissions are 644 and so the owner is
    important.

    In particular, "echo -n disk > /sys/power/state" will cause the machine to
    suspend to disk (hence the security tag).

    Found when I suddenly thought, "hang on, shouldn't I be root" :-)

    Results so far:

    2.6.8-rc2-mm1 - bad
    2.6.8-rc2 - okay
    2.6.8-rc3 - okay
    2.6.8-rc3-mm1 - bad

    .config file available on request. compiled with gcc 3.3.4 (debian 1:3.3.4-6)

    Adrian 

    -- 
Email: adrian@smop.co.uk
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  • Next message: Andrew Morton: "Re: -mm swsusp: fix highmem handling"

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