On 12/18/2012 10:11 AM, Piotr Karbowski wrote:
Hi,
For some reason when i do move /dev/msr[0-9]+ nodes to /dev/cpu the
/dev/cpu is getting 777 permissions. The very rule that affect it:
msr([0-9]+) root:root 600 =cpu/%1/msr
Testcase:
### mdev.conf without msr:
microcode root:root 600 =cpu/
cpu([0-9]+) root:root 600 =cpu/%1/cpuid
# rm /dev/cpu -rf; mdev -s; ls -ld /dev/cpu
drwxr-xr-x 6 root root 140 Dec 18 10:07 /dev/cpu/
Good so far.
### mdev.conf with msr:
microcode root:root 600 =cpu/
cpu([0-9]+) root:root 600 =cpu/%1/cpuid
msr([0-9]+) root:root 600 =cpu/%1/msr
# rm /dev/cpu -rf; mdev -s; ls -ld /dev/cpu
drwxrwxrwx 6 root root 140 Dec 18 10:08 /dev/cpu/
And the /dev/cpu is 777, whatever is the order of msr, or even with
there is only rule for msr, the /dev/cpu become 777, the /dev/cpu/0/ is
755 as it should be.
Busybox mdev 1.20.2
A bit more debuging, the rule:
msr0 root:root 600 =cpu/msr0
Does work, but if I add / at the end, like:
msr0 root:root 600 =cpu/msr0/msr
it does alter /dev/cpu permissions.
-- Piotr.
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