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Description of problem:
There is an "avc denied" log during tests of NFS crossmnt (details please find from manpage exports(5)) with root "/".
Version-Release number of selected component (if applicable):
RHEL-7.3
How reproducible:
100% easily
Steps to Reproduce:
1. echo '/ *(ro,crossmnt,nohide,no_root_squash)' > /etc/exports
2. systemctl restart nfs
3. Mount the "/" to any mount point
4. Read contents of $mountpoint/boot/
Actual results:
# echo '/ *(ro,crossmnt,nohide,no_root_squash)' >/etc/exports
# systemctl restart nfs
# mount localhost:/ /mnt/mnt_test/
# cat /var/log/audit/audit.log | grep denied
# ls /mnt/mnt_test/boot/ &>/dev/null
# cat /var/log/audit/audit.log | grep denied
type=AVC msg=audit(1491444765.616:197): avc: denied { search } for pid=30483 comm="rpc.mountd" name="/" dev="configfs" ino=7560 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:configfs_t:s0 tclass=dir
#
Expected results:
No AVC failure.
Additional info:
Rhel6 doesn't have this warning.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2018:0763
Description of problem: There is an "avc denied" log during tests of NFS crossmnt (details please find from manpage exports(5)) with root "/". Version-Release number of selected component (if applicable): RHEL-7.3 How reproducible: 100% easily Steps to Reproduce: 1. echo '/ *(ro,crossmnt,nohide,no_root_squash)' > /etc/exports 2. systemctl restart nfs 3. Mount the "/" to any mount point 4. Read contents of $mountpoint/boot/ Actual results: # echo '/ *(ro,crossmnt,nohide,no_root_squash)' >/etc/exports # systemctl restart nfs # mount localhost:/ /mnt/mnt_test/ # cat /var/log/audit/audit.log | grep denied # ls /mnt/mnt_test/boot/ &>/dev/null # cat /var/log/audit/audit.log | grep denied type=AVC msg=audit(1491444765.616:197): avc: denied { search } for pid=30483 comm="rpc.mountd" name="/" dev="configfs" ino=7560 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:configfs_t:s0 tclass=dir # Expected results: No AVC failure. Additional info: Rhel6 doesn't have this warning.