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Description of problem:
The RHEL6 test is checking if /dev/twa has context fixed_disk_device_t
but on RHEL7 it has context device_t. According to mail from mgrepl it is not correct and should be fixed.

Test:
/CoreOS/selinux-policy/Regression/bz547387-smartd-cannot-access-sg-devices
The test is based on this bug:
https://bugzilla.redhat.com/show_bug.cgi?id=715227

Version-Release number of selected component (if applicable):
selinux-policy-3.10.0-131.el7.noarch

Michal,
what does 

# grep -r tw /etc/selinux/targeted/contexts/files/ |grep fixed
/etc/selinux/targeted/contexts/files/file_contexts:/dev/tw[a-z][^/]+	-c	system_u:object_r:fixed_disk_device_t:s0

on RHEL7 system?

# matchpathcon /dev/twa
/dev/twa	system_u:object_r:device_t:s0
# matchpathcon /dev/twa0
/dev/twa0	system_u:object_r:fixed_disk_device_t:s0
# grep -r tw /etc/selinux/targeted/contexts/files/ | grep fixed
/etc/selinux/targeted/contexts/files/file_contexts:/dev/tw[a-z][^/]+	-c	system_u:object_r:fixed_disk_device_t:s0
#

+ means there has to be a non / after /dev/tw[a-z]

If we want to match on /dev/twa then we need /dev/tw[a-z][^/]*

This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.