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Bug 800929 - nfs-server restart causes avc denial, avc: denied { execute } for pid=14480 comm="sh" name="mount"
Summary: nfs-server restart causes avc denial, avc: denied { execute } for pid=1448...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy
Version: 7.0
Hardware: All
OS: Linux
high
medium
Target Milestone: rc
: ---
Assignee: Miroslav Grepl
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-03-07 14:14 UTC by Petr Sklenar
Modified: 2014-06-18 02:11 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-06-13 13:12:35 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Petr Sklenar 2012-03-07 14:14:45 UTC 
Description of problem:
service nfs-server restart causes avc denial and its not started

Version-Release number of selected component (if applicable):
nfs-utils-1.2.5-3.el7.x86_64
selinux-policy-3.10.0-56.el7.noarch

How reproducible:
deterministic

Steps to Reproduce:
1. service nfs-server restart
  
Actual results:
# restorecon /bin/mount

# getenforce 
Enforcing

# ls -laZ /bin/mount
-rwsr-xr-x. root root system_u:object_r:mount_exec_t:s0 /bin/mount

# service nfs-server restart
Redirecting to /bin/systemctl  restart nfs-server.service
type=AVC msg=audit(1331129342.367:1159): avc:  denied  { execute } for  pid=14480 comm="sh" name="mount" dev=dm-1 ino=397106 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:mount_exec_t:s0 tclass=file
type=AVC msg=audit(1331129342.368:1160): avc:  denied  { execute } for  pid=14480 comm="sh" name="mount" dev=dm-1 ino=397106 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:mount_exec_t:s0 tclass=file
Job failed. See system logs and 'systemctl status' for details.

# find / -inum 397106
/bin/mount

Expected results:
no denial
nfs-server can start

Additional info:
Comment 1 Daniel Walsh 2012-03-07 18:52:34 UTC 
If you run in permissive mode, do you see any other AVC's?
Comment 3 Milos Malik 2012-04-10 07:18:25 UTC 
Yes, following AVCs appear in permissive mode:
----
time->Tue Apr 10 11:12:19 2012
type=SYSCALL msg=audit(1334049139.673:71): arch=c000003e syscall=59 success=yes exit=0 a0=177c2b0 a1=177c3d0 a2=177af60 a3=7fff88b1cfa0 items=0 ppid=1319 pid=1320 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="mount" exe="/bin/mount" subj=system_u:system_r:nfsd_t:s0 key=(null)
type=AVC msg=audit(1334049139.673:71): avc:  denied  { execute_no_trans } for  pid=1320 comm="sh" path="/bin/mount" dev=sda4 ino=2883655 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:mount_exec_t:s0 tclass=file
type=AVC msg=audit(1334049139.673:71): avc:  denied  { execute } for  pid=1320 comm="sh" name="mount" dev=sda4 ino=2883655 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:mount_exec_t:s0 tclass=file
----
time->Tue Apr 10 11:12:19 2012
type=SYSCALL msg=audit(1334049139.677:72): arch=c000003e syscall=2 success=yes exit=3 a0=7fb3682c14f0 a1=42 a2=1a4 a3=7fffbc3a5dc0 items=0 ppid=1319 pid=1320 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="mount" exe="/bin/mount" subj=system_u:system_r:nfsd_t:s0 key=(null)
type=AVC msg=audit(1334049139.677:72): avc:  denied  { write } for  pid=1320 comm="mount" name="utab" dev=tmpfs ino=1970 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:mount_var_run_t:s0 tclass=file
----
time->Tue Apr 10 11:12:19 2012
type=SYSCALL msg=audit(1334049139.678:73): arch=c000003e syscall=165 success=yes exit=0 a0=7fb3693dd1d0 a1=7fb3693dd1f0 a2=7fb3693dd210 a3=ffffffffc0ed0000 items=0 ppid=1319 pid=1320 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="mount" exe="/bin/mount" subj=system_u:system_r:nfsd_t:s0 key=(null)
type=AVC msg=audit(1334049139.678:73): avc:  denied  { module_request } for  pid=1320 comm="mount" kmod="nfsd" scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=system
type=AVC msg=audit(1334049139.678:73): avc:  denied  { mounton } for  pid=1320 comm="mount" path="/proc/fs/nfsd" dev=proc ino=4026531845 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:proc_t:s0 tclass=dir
----
time->Tue Apr 10 11:12:19 2012
type=SYSCALL msg=audit(1334049139.803:74): arch=c000003e syscall=21 success=yes exit=0 a0=7fb3693dd1f0 a1=2 a2=0 a3=7fffbc3a5f80 items=0 ppid=1319 pid=1320 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="mount" exe="/bin/mount" subj=system_u:system_r:nfsd_t:s0 key=(null)
type=AVC msg=audit(1334049139.803:74): avc:  denied  { write } for  pid=1320 comm="mount" name="/" dev=nfsd ino=1 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:nfsd_fs_t:s0 tclass=dir
----
Comment 4 Daniel Walsh 2012-04-10 20:39:40 UTC 
Fixed in selinux-policy-3.10.0-114.fc17
Comment 7 Ludek Smid 2014-06-13 13:12:35 UTC 
This request was resolved in Red Hat Enterprise Linux 7.0.

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