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SubjectRe: broken ownership of /proc/sys/ files on 2.6.27
Date
On Sunday, 16 of November 2008, Peter Palfrader wrote:
> Hi,
>
> on several (probably all) of my systems running a 2.6.27 kernel on at
> least i386, amd64, ia64, sparc proc/sys does have files not owned by
> root:

Well, my system running 2.6.27.6 doesn't have this problem.

> weasel@villa:~$ find /proc/sys ! -uid 0 -ls
> 2273612 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:55 /proc/sys/kernel/sched_rt_runtime_us
> 2273615 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:55 /proc/sys/kernel/core_uses_pid
> 2273616 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:55 /proc/sys/kernel/core_pattern
> 2273621 0 -rw-r--r-- 1 nobody munin 0 Nov 16 20:55 /proc/sys/kernel/hotplug
> 2273622 0 -rw-r--r-- 1 nobody munin 0 Nov 16 20:55 /proc/sys/kernel/acct
> 2273623 0 -rw-r--r-- 1 nobody munin 0 Nov 16 20:55 /proc/sys/kernel/sysrq
> 2273624 0 -rw------- 1 nobody munin 0 Nov 16 20:55 /proc/sys/kernel/cad_pid
> 2273625 0 -rw-r--r-- 1 nobody munin 0 Nov 16 20:55 /proc/sys/kernel/threads-max
> 2217102 0 -r--r--r-- 1 joy Debian 0 Nov 16 19:57 /proc/sys/kernel/random/entropy_avail
> 2273626 0 -rw-r--r-- 1 nobody munin 0 Nov 16 20:55 /proc/sys/kernel/overflowuid
> 2273627 0 -rw-r--r-- 1 nobody munin 0 Nov 16 20:55 /proc/sys/kernel/overflowgid
> 2273628 0 -rw-r--r-- 1 nobody munin 0 Nov 16 20:55 /proc/sys/kernel/panic_on_oops
> 2273635 0 -r--r--r-- 1 nobody nogroup 0 Nov 16 20:55 /proc/sys/kernel/bootloader_type
> 2273636 0 -rw-r--r-- 1 weasel Debian 0 Nov 16 20:55 /proc/sys/kernel/kstack_depth_to_print
> 2273638 0 -rw-r--r-- 1 weasel Debian 0 Nov 16 20:55 /proc/sys/kernel/randomize_va_space
> 2273598 0 dr-xr-xr-x 0 weasel Debian 0 Nov 16 20:55 /proc/sys/vm
> 2209118 0 -r--r--r-- 1 joy Debian 0 Nov 16 19:50 /proc/sys/fs/file-nr
> weasel@villa:~$ uname -a
> Linux villa 2.6.27.6-dsa-dl380-oldxeon #2 SMP Fri Nov 14 01:40:49 CET 2008 i686 GNU/Linux
>
>
> weasel@ravel:~$ find /proc/sys ! -uid 0 -ls
> 3917380 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:57 /proc/sys/kernel/sched_latency_ns
> 3917381 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:57 /proc/sys/kernel/sched_wakeup_granularity_ns
> 3917382 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:57 /proc/sys/kernel/sched_shares_ratelimit
> 3917383 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:57 /proc/sys/kernel/sched_child_runs_first
> 3917384 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:57 /proc/sys/kernel/sched_features
> 3917387 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:57 /proc/sys/kernel/sched_rt_period_us
> 3917388 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:57 /proc/sys/kernel/sched_rt_runtime_us
> 3917389 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:57 /proc/sys/kernel/sched_compat_yield
> 3847910 0 -rw-r--r-- 1 joeyh Debian 0 Nov 16 20:11 /proc/sys/kernel/pid_max
> 3917373 0 dr-xr-xr-x 0 weasel Debian 0 Nov 16 20:57 /proc/sys/fs
> 3917376 0 dr-xr-xr-x 0 nagios nagios 0 Nov 16 20:57 /proc/sys/net
> weasel@ravel:~$ uname -a
> Linux ravel 2.6.27.6-dsa-amd64-opteron #2 SMP Fri Nov 14 01:32:43 CET 2008 x86_64 GNU/Linux
>
> weasel@caballero:~$ find /proc/sys ! -uid 0 -ls
> 6950 0 -rw-r--r-- 1 weasel Debian 0 Nov 16 20:48 /proc/sys/kernel/sched_min_granularity_ns
> 6951 0 -rw-r--r-- 1 weasel Debian 0 Nov 16 20:48 /proc/sys/kernel/sched_latency_ns
> 6955 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:48 /proc/sys/kernel/sched_features
> 6959 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:48 /proc/sys/kernel/sched_rt_runtime_us
> 2173 0 -r--r--r-- 1 nobody munin 0 Nov 16 20:35 /proc/sys/kernel/random/entropy_avail
> 6971 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:48 /proc/sys/kernel/overflowuid
> 6972 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:48 /proc/sys/kernel/overflowgid
> 6973 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:48 /proc/sys/kernel/panic_on_oops
> 6974 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:48 /proc/sys/kernel/printk_ratelimit
> 6975 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:48 /proc/sys/kernel/printk_ratelimit_burst
> 6978 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:48 /proc/sys/kernel/softlockup_panic
> 6979 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:48 /proc/sys/kernel/softlockup_thresh
> 6980 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:48 /proc/sys/kernel/hung_task_check_count
> 1618 0 -r--r--r-- 1 nobody munin 0 Nov 16 20:35 /proc/sys/fs/file-nr
> weasel@caballero:~$ uname -a
> Linux caballero 2.6.27.2-dsa-mckinley #1 SMP Sun Oct 19 12:14:46 UTC 2008 ia64 GNU/Linux
>
> weasel@spontini:~$ find /proc/sys ! -uid 0 -ls
> 41263 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:58 /proc/sys/kernel/panic
> 41264 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:58 /proc/sys/kernel/core_uses_pid
> 41267 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:58 /proc/sys/kernel/real-root-dev
> 41271 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:58 /proc/sys/kernel/scons-poweroff
> 41272 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:58 /proc/sys/kernel/ctrl-alt-del
> 41273 0 -r--r--r-- 1 nagios nagios 0 Nov 16 20:58 /proc/sys/kernel/sg-big-buff
> 41280 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:58 /proc/sys/kernel/printk
> 41291 0 -r--r--r-- 1 nagios nagios 0 Nov 16 20:58 /proc/sys/kernel/version
> 41292 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:58 /proc/sys/kernel/hostname
> 41293 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:58 /proc/sys/kernel/domainname
> 41294 0 -rw-r--r-- 1 nagios nagios 0 Nov 16 20:58 /proc/sys/kernel/shmmax
> 5299 0 -r--r--r-- 1 nobody munin 0 Nov 16 19:22 /proc/sys/fs/file-nr
> 41259 0 dr-xr-xr-x 0 weasel Debian 0 Nov 16 20:58 /proc/sys/debug
> weasel@spontini:~$ uname -a
> Linux spontini 2.6.27.2-dsa-usii #2 SMP Sun Oct 19 16:34:26 CEST 2008 sparc64 GNU/Linux
>
>
> That's probably not how it should be, right?

No, it's not.

Thanks,
Rafael


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