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xanb

Member

Registered: 2012-07-24

Posts: 418

[solved] I can't access to chroot /dev/null

Hi,

I have a chroot in /var/corral. *Outside* the chroot (and *inside* the chroot too), I can't access to /dev/null:

[root@serviedre xan]# ls > /var/corral/dev/null 
bash: /var/corral/dev/null: Permission denied

These are my permissions:

[root@serviedre xan]# ls /var/corral/ -R -l
/var/corral/:
total 20
drwxr-xr-x 2 root root 4096 Jun 30 13:09 dev
dr-xr-xr-x 3 root root 4096 Jun 27 19:31 etc
lrwxrwxrwx 1 root root    7 Jun 27 19:11 lib -> usr/lib
lrwxrwxrwx 1 root root    7 Jun 27 19:12 lib64 -> usr/lib
drwxrwxrwt 2 root root   40 Jun 30 14:03 run
drwxrwxrwt 2 root root   40 Jun 30 14:03 tmp
dr-xr-xr-x 5 root root 4096 Jun 27 19:12 usr
dr-xr-xr-x 4 root root 4096 Jun 27 19:11 var
drwxr-xr-- 3 http http 4096 Jun 28 21:24 www

/var/corral/dev:
total 0
crw-rw-rw- 1 root root 1, 3 Jun 30 13:09 null
crw-rw-rw- 1 root root 1, 8 Jun 27 19:08 random
cr--r--r-- 1 root root 1, 9 Jun 27 19:08 urandom

/var/corral/etc:
total 368
-rw-r--r-- 1 root root     24 Jun 27 19:29 group
-rw-r--r-- 1 root root     18 Jun 27 19:31 gshadow
-rw-r--r-- 1 root root     63 Jun 27 19:28 host.conf
-rw-r--r-- 1 root root    215 Jun 27 19:28 hosts
-rw-r--r-- 1 root root  28420 Jun 27 19:28 ld.so.cache
-rw-r--r-- 1 root root     71 Jun 27 19:28 ld.so.conf
-rw-r--r-- 1 root root   2619 Jun 27 19:28 localtime
drwxr-xr-- 3 http http   4096 Jun 30 10:56 nginx
-rw-r--r-- 1 root root   2387 Jun 27 19:28 nscd.conf
-rw-r--r-- 1 root root    234 Jun 27 19:28 nsswitch.conf
-rw-r--r-- 1 root root     66 Jun 27 19:30 passwd
-rw-r--r-- 1 root root   3208 Jun 27 19:28 protocols
-rw-r--r-- 1 root root     69 Jun 27 19:28 resolv.conf
-rw-r--r-- 1 root root 292305 Jun 27 19:28 services
-rw-r--r-- 1 root root     40 Jun 27 19:30 shadow
-rw-r--r-- 1 root root      0 Jun 27 19:31 shells

/var/corral/etc/nginx:
total 44
-rw-r--r-- 1 http http 1034 Jun 27 19:28 fastcgi.conf
-rw-r--r-- 1 http http  964 Jun 27 19:28 fastcgi_params
-rw-r--r-- 1 http http 2837 Jun 27 19:28 koi-utf
-rw-r--r-- 1 http http 2223 Jun 27 19:28 koi-win
drwxr-xr-- 2 http http 4096 Jun 27 19:09 logs
-rw-r--r-- 1 http http 3957 Jun 27 19:28 mime.types
-rw-r--r-- 1 http http  809 Jun 28 21:25 nginx.conf
-rw-r--r-- 1 http http 2672 Jun 27 19:28 nginx.conf.antic
-rw-r--r-- 1 http http  596 Jun 27 19:28 scgi_params
-rw-r--r-- 1 http http  623 Jun 27 19:28 uwsgi_params
-rw-r--r-- 1 http http 3610 Jun 27 19:28 win-utf

/var/corral/etc/nginx/logs:
total 0

/var/corral/run:
total 0

/var/corral/tmp:
total 0

/var/corral/usr:
total 12
dr-xr-xr-x 2 root root 4096 Jun 30 12:37 bin
dr-xr-xr-x 2 root root 4096 Jun 27 19:27 lib
lrwxrwxrwx 1 root root    3 Jun 27 19:12 lib64 -> lib
dr-xr-xr-x 3 root root 4096 Jun 27 19:10 share

/var/corral/usr/bin:
total 1852
-rwxr-xr-x 1 root root 931664 Jun 30 12:34 busybox
-rwxr-xr-x 1 root root 962192 Jun 27 19:22 nginx
lrwxrwxrwx 1 root root      7 Jun 30 12:37 sh -> busybox

/var/corral/usr/lib:
total 6964
-rwxr-xr-x 1 root root  164232 Jun 27 19:25 ld-linux-x86-64.so.2
-r-xr-xr-x 1 root root 2855424 Jun 27 19:25 libcrypto.so.1.0.0
-rwxr-xr-x 1 root root   39184 Jun 27 19:25 libcrypt.so.1
-rwxr-xr-x 1 root root 1979984 Jun 27 19:25 libc.so.6
-rwxr-xr-x 1 root root   14576 Jun 27 19:25 libdl.so.2
-rwxr-xr-x 1 root root   31536 Jun 27 19:27 libnss_compat-2.21.so
-rwxr-xr-x 1 root root   31536 Jun 27 19:27 libnss_compat.so
-rwxr-xr-x 1 root root   31536 Jun 27 19:27 libnss_compat.so.2
-rwxr-xr-x 1 root root   31072 Jun 27 19:27 libnss_db-2.21.so
-rwxr-xr-x 1 root root   31072 Jun 27 19:27 libnss_db.so
-rwxr-xr-x 1 root root   31072 Jun 27 19:27 libnss_db.so.2
-rwxr-xr-x 1 root root   22864 Jun 27 19:27 libnss_dns-2.21.so
-rwxr-xr-x 1 root root   22864 Jun 27 19:27 libnss_dns.so
-rwxr-xr-x 1 root root   22864 Jun 27 19:27 libnss_dns.so.2
-rwxr-xr-x 1 root root   51712 Jun 27 19:27 libnss_files-2.21.so
-rwxr-xr-x 1 root root   51712 Jun 27 19:27 libnss_files.so
-rwxr-xr-x 1 root root   51712 Jun 27 19:27 libnss_files.so.2
-rwxr-xr-x 1 root root   22896 Jun 27 19:27 libnss_hesiod-2.21.so
-rwxr-xr-x 1 root root   22896 Jun 27 19:27 libnss_hesiod.so
-rwxr-xr-x 1 root root   22896 Jun 27 19:27 libnss_hesiod.so.2
-rwxr-xr-x 1 root root   47608 Jun 27 19:27 libnss_nis-2.21.so
-rwxr-xr-x 1 root root   51648 Jun 27 19:27 libnss_nisplus-2.21.so
-rwxr-xr-x 1 root root   51648 Jun 27 19:27 libnss_nisplus.so
-rwxr-xr-x 1 root root   51648 Jun 27 19:27 libnss_nisplus.so.2
-rwxr-xr-x 1 root root   47608 Jun 27 19:27 libnss_nis.so
-rwxr-xr-x 1 root root   47608 Jun 27 19:27 libnss_nis.so.2
-rwxr-xr-x 1 root root  456936 Jun 27 19:25 libpcre.so.1
-rwxr-xr-x 1 root root  142832 Jun 27 19:25 libpthread.so.0
-r-xr-xr-x 1 root root  557360 Jun 27 19:25 libssl.so.1.0.0
-rwxr-xr-x 1 root root   88592 Jun 27 19:25 libz.so.1

/var/corral/usr/share:
total 4
dr-xr-xr-x 3 root root 4096 Jun 27 19:22 nginx

/var/corral/usr/share/nginx:
total 4
dr-xr-xr-x 2 root root 4096 Jun 27 19:22 html

/var/corral/usr/share/nginx/html:
total 8
-rw-r--r-- 1 root root 537 Jun 27 19:22 50x.html
-rw-r--r-- 1 root root 612 Jun 27 19:22 index.html

/var/corral/var:
total 8
dr-xr-xr-x 3 root root 4096 Jun 27 19:11 lib
dr-xr-xr-x 3 root root 4096 Jun 27 19:11 log

/var/corral/var/lib:
total 4
drwxr-xr-- 8 http http 4096 Jun 30 11:29 nginx

/var/corral/var/lib/nginx:
total 24
drwxr--r-- 2 http http 4096 Jun 30 11:29 client-body
drwxr--r-- 2 http http 4096 Jun 30 11:29 fastcgi
drwxr-xr-- 7 http http 4096 Jun 27 19:22 nginx
drwxr--r-- 2 http http 4096 Jun 30 11:29 proxy
drwxr--r-- 2 http http 4096 Jun 30 11:29 scgi
drwxr--r-- 2 http http 4096 Jun 30 11:29 uwsgi

/var/corral/var/lib/nginx/client-body:
total 0

/var/corral/var/lib/nginx/fastcgi:
total 0

/var/corral/var/lib/nginx/nginx:
total 20
drwxr--r-- 2 http http 4096 Jun 27 19:22 client-body
drwxr--r-- 2 http http 4096 Jun 27 19:22 fastcgi
drwxr--r-- 2 http http 4096 Jun 27 19:22 proxy
drwxr--r-- 2 http http 4096 Jun 27 19:22 scgi
drwxr--r-- 2 http http 4096 Jun 27 19:22 uwsgi

/var/corral/var/lib/nginx/nginx/client-body:
total 0

/var/corral/var/lib/nginx/nginx/fastcgi:
total 0

/var/corral/var/lib/nginx/nginx/proxy:
total 0

/var/corral/var/lib/nginx/nginx/scgi:
total 0

/var/corral/var/lib/nginx/nginx/uwsgi:
total 0

/var/corral/var/lib/nginx/proxy:
total 0

/var/corral/var/lib/nginx/scgi:
total 0

/var/corral/var/lib/nginx/uwsgi:
total 0

/var/corral/var/log:
total 4
drwxr-xr-- 2 http http 4096 Jun 30 11:29 nginx

/var/corral/var/log/nginx:
total 0
-rw-r--r-- 1 http http 0 Jun 30 11:29 access.log

/var/corral/www:
total 12
-rw-r--r-- 1 http http  537 Jun 27 19:22 50x.html
drwxr-xr-- 2 http http 4096 Jun 27 19:11 cgi-bin
-rw-r--r-- 1 http http  612 Jun 27 19:22 index.html

/var/corral/www/cgi-bin:
total 0
[root@serviedre xan]# 

Any ideas?

Thanks,

Last edited by xanb (2015-06-30 12:47:29)

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Owning one OpenRC (artoo way) and other three systemd machines

xanb

Member

Registered: 2012-07-24

Posts: 418

Re: [solved] I can't access to chroot /dev/null

Solved: /var was mounted with no-dev:
/dev/sda5 on /var type ext4 (rw,nodev,relatime,discard,data=ordered)

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Owning one OpenRC (artoo way) and other three systemd machines