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On 09/02/2010 05:13 PM, Daniel B. Thurman wrote:
On 09/02/2010 12:52 PM, Daniel J Walsh wrote:
> On 09/02/2010 01:45 PM, Daniel B. Thurman wrote:
>> It is interesting to note that for /md/X/ mounted filesystem, a root
>> user cannot change the / files, whereas / subdirectory files can be
>> changed/modified.
>
>> The workaround is to unmount the /md/X filesystem, remounting it
>> as default, make the change, unmount again, and then mount -a OR
>> simply reboot to the OS and make the changes in the normal way.
>
> That is strange, what AVC are you seeing?
Hope this helps somewhat...
With a little more research, I discovered that I cannot
create a new file, cannot create a new file via the vi
command, but I can modify/delete an existing file and
AVCs are generated in most cases when creating and
modifying a file, but not deleting, or so it seems.
I am booted in F13, and have F12 mounted in /md.
In general, the same three commands are the same
in any place on the md partition, depending perhaps
on user ownership.
(1): cd /md/RF12D1; touch foo (Cannot create empty file: foo)
========================================
Summary:
SELinux is preventing /bin/touch "associate" access on foo.
Detailed Description:
SELinux denied access requested by touch. It is not expected that this
access is
required by touch and this access may signal an intrusion attempt. It is
also
possible that the specific version or configuration of the application is
causing it to require additional access.
Allowing Access:
You can generate a local policy module to allow this access - see FAQ
(
http://docs.fedoraproject.org/selinux-faq-fc5/#id2961385) Please file a bug
report.
Additional Information:
Source Context unconfined_u:object_r:etc_runtime_t:s0
Target Context system_u:object_r:root_t:s0
Target Objects foo [ filesystem ]
Source touch
Source Path /bin/touch
Port <Unknown>
Host
gold.cdkkt.com
Source RPM Packages coreutils-8.4-8.fc13
Target RPM Packages
Policy RPM selinux-policy-3.7.19-51.fc13
Selinux Enabled True
Policy Type targeted
Enforcing Mode Enforcing
Plugin Name catchall
Host Name
gold.cdkkt.com
Platform Linux
gold.cdkkt.com 2.6.34.6-47.fc13.i686
#1 SMP
Fri Aug 27 09:48:44 UTC 2010 i686 i686
Alert Count 1
First Seen Thu 02 Sep 2010 01:48:47 PM PDT
Last Seen Thu 02 Sep 2010 01:48:47 PM PDT
Local ID 9e913bde-6ed4-4d4b-9bfc-ddc06ec0f0c8
Line Numbers
Raw Audit Messages
node=gold.cdkkt.com type=AVC msg=audit(1283460527.718:896): avc:
denied { associate } for pid=19648 comm="touch" name="foo"
scontext=unconfined_u:object_r:etc_runtime_t:s0
tcontext=system_u:object_r:root_t:s0 tclass=filesystem
node=gold.cdkkt.com type=SYSCALL msg=audit(1283460527.718:896):
arch=40000003 syscall=5 success=no exit=-13 a0=bffb6de9 a1=8941 a2=1b6
a3=bffb6de9 items=0 ppid=17927 pid=19648 auid=500 uid=0 gid=0 euid=0
suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=1 comm="touch"
exe="/bin/touch"
subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)
(2): cd /md/RF12D1; vi foo (Cannot create file: foo)
AVS (a) "vi foo", (b) Modify, Write & Save not possible, no AVC
(a) ========================================
Summary:
SELinux is preventing /bin/vi "associate" access on .foo.swp.
Detailed Description:
SELinux denied access requested by vi. It is not expected that this
access is
required by vi and this access may signal an intrusion attempt. It is also
possible that the specific version or configuration of the application is
causing it to require additional access.
Allowing Access:
You can generate a local policy module to allow this access - see FAQ
(
http://docs.fedoraproject.org/selinux-faq-fc5/#id2961385) Please file a bug
report.
Additional Information:
Source Context unconfined_u:object_r:etc_runtime_t:s0
Target Context system_u:object_r:root_t:s0
Target Objects .foo.swp [ filesystem ]
Source vi
Source Path /bin/vi
Port <Unknown>
Host
gold.cdkkt.com
Source RPM Packages vim-minimal-7.2.411-1.fc13
Target RPM Packages
Policy RPM selinux-policy-3.7.19-51.fc13
Selinux Enabled True
Policy Type targeted
Enforcing Mode Enforcing
Plugin Name catchall
Host Name
gold.cdkkt.com
Platform Linux
gold.cdkkt.com 2.6.34.6-47.fc13.i686
#1 SMP
Fri Aug 27 09:48:44 UTC 2010 i686 i686
Alert Count 1
First Seen Thu 02 Sep 2010 01:49:39 PM PDT
Last Seen Thu 02 Sep 2010 01:49:39 PM PDT
Local ID 01dced02-64b8-4543-a021-c5d9d141d9a4
Line Numbers
Raw Audit Messages
node=gold.cdkkt.com type=AVC msg=audit(1283460579.305:898): avc:
denied { associate } for pid=19762 comm="vi" name=".foo.swp"
scontext=unconfined_u:object_r:etc_runtime_t:s0
tcontext=system_u:object_r:root_t:s0 tclass=filesystem
node=gold.cdkkt.com type=SYSCALL msg=audit(1283460579.305:898):
arch=40000003 syscall=5 success=no exit=-13 a0=858f310 a1=280c2 a2=180
a3=858f310 items=0 ppid=17927 pid=19762 auid=500 uid=0 gid=0 euid=0
suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=1 comm="vi"
exe="/bin/vi" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
key=(null)
3: cd /md/RF12D1/etc; vi fstab [Can modify & save existing file]
AVCs: (a) vi fstab, (b) modify, write & save
(a) ========================================
Summary:
SELinux is preventing /bin/vi "associate" access on .fstab.swp.
Detailed Description:
SELinux denied access requested by vi. It is not expected that this
access is
required by vi and this access may signal an intrusion attempt. It is also
possible that the specific version or configuration of the application is
causing it to require additional access.
Allowing Access:
You can generate a local policy module to allow this access - see FAQ
(
http://docs.fedoraproject.org/selinux-faq-fc5/#id2961385) Please file a bug
report.
Additional Information:
Source Context unconfined_u:object_r:etc_runtime_t:s0
Target Context system_u:object_r:root_t:s0
Target Objects .fstab.swp [ filesystem ]
Source vi
Source Path /bin/vi
Port <Unknown>
Host
gold.cdkkt.com
Source RPM Packages vim-minimal-7.2.411-1.fc13
Target RPM Packages
Policy RPM selinux-policy-3.7.19-51.fc13
Selinux Enabled True
Policy Type targeted
Enforcing Mode Enforcing
Plugin Name catchall
Host Name
gold.cdkkt.com
Platform Linux
gold.cdkkt.com 2.6.34.6-47.fc13.i686
#1 SMP
Fri Aug 27 09:48:44 UTC 2010 i686 i686
Alert Count 1
First Seen Thu 02 Sep 2010 01:51:05 PM PDT
Last Seen Thu 02 Sep 2010 01:51:05 PM PDT
Local ID e7b9c7a4-f908-4e0e-8d33-a92dc5e115a9
Line Numbers
Raw Audit Messages
node=gold.cdkkt.com type=AVC msg=audit(1283460665.979:912): avc:
denied { associate } for pid=19806 comm="vi" name=".fstab.swp"
scontext=unconfined_u:object_r:etc_runtime_t:s0
tcontext=system_u:object_r:root_t:s0 tclass=filesystem
node=gold.cdkkt.com type=SYSCALL msg=audit(1283460665.979:912):
arch=40000003 syscall=5 success=no exit=-13 a0=86c9320 a1=280c2 a2=180
a3=86c9320 items=0 ppid=17927 pid=19806 auid=500 uid=0 gid=0 euid=0
suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=1 comm="vi"
exe="/bin/vi" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
key=(null)
(b) ========================================
Summary:
SELinux is preventing /bin/vi "associate" access on fstab~.
Detailed Description:
SELinux denied access requested by vi. It is not expected that this
access is
required by vi and this access may signal an intrusion attempt. It is also
possible that the specific version or configuration of the application is
causing it to require additional access.
Allowing Access:
You can generate a local policy module to allow this access - see FAQ
(
http://docs.fedoraproject.org/selinux-faq-fc5/#id2961385) Please file a bug
report.
Additional Information:
Source Context unconfined_u:object_r:etc_runtime_t:s0
Target Context system_u:object_r:root_t:s0
Target Objects fstab~ [ filesystem ]
Source vi
Source Path /bin/vi
Port <Unknown>
Host
gold.cdkkt.com
Source RPM Packages vim-minimal-7.2.411-1.fc13
Target RPM Packages
Policy RPM selinux-policy-3.7.19-51.fc13
Selinux Enabled True
Policy Type targeted
Enforcing Mode Enforcing
Plugin Name catchall
Host Name
gold.cdkkt.com
Platform Linux
gold.cdkkt.com 2.6.34.6-47.fc13.i686
#1 SMP
Fri Aug 27 09:48:44 UTC 2010 i686 i686
Alert Count 4
First Seen Thu 02 Sep 2010 01:58:28 PM PDT
Last Seen Thu 02 Sep 2010 01:58:32 PM PDT
Local ID 5594e318-4b02-4875-be04-c5fe6fa2cf8d
Line Numbers
Raw Audit Messages
node=gold.cdkkt.com type=AVC msg=audit(1283461112.259:930): avc:
denied { associate } for pid=20016 comm="vi" name="fstab~"
scontext=unconfined_u:object_r:etc_runtime_t:s0
tcontext=system_u:object_r:root_t:s0 tclass=filesystem
node=gold.cdkkt.com type=SYSCALL msg=audit(1283461112.259:930):
arch=40000003 syscall=5 success=no exit=-13 a0=87dedc0 a1=280c1 a2=1a4
a3=87dedc0 items=0 ppid=17927 pid=20016 auid=500 uid=0 gid=0 euid=0
suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=1 comm="vi"
exe="/bin/vi" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
key=(null)
4: cd /md/var/tmp; rm <file>, selinux context-root_t
No AVC generated
========================================
I think the problem is the context you chose. The tools are trying to
do a transition and change the context. Since you chose root_t the
label of /, the kernel is trying to place etc_runtime_t files in the
directory. If you were to touch a file in / the same thing would happen.
If you change your context line to use nfs_t or usr_t, I think you will
get a better result.
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