Description of problem:
I was getting the following errors.
Jun 06 10:06:13 ganak. kdumpctl[981]: No memory reserved for crash kernel.
Jun 06 10:06:13 ganak. kdumpctl[981]: Starting kdump: [FAILED]

To solve it I executed system-config-kdump
Which opened a gui where initially "Firmware assisted dump" was selected by default. It automatically selected "Manual Settings"
& filled "New kdump Memory" to 128(MB) while "Current kdump Memory" remained 0 (MB)

At this point the 3 selinux alerts happened.

type=AVC msg=audit(1496811012.375:1681): avc:  denied  { read } for  pid=10088 comm="grubby" name="sr0" dev="devtmpfs" ino=11675 scontext=system_u:system_r:kdumpgui_t:s0-s0:c0.c1023 tcontext=system_u:object_r:removable_device_t:s0 tclass=blk_file permissive=0
type=AVC msg=audit(1496811013.149:1682): avc:  denied  { write } for  pid=10088 comm="grubby" name="/" dev="tmpfs" ino=11695 scontext=system_u:system_r:kdumpgui_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_run_t:s0 tclass=dir permissive=0
type=AVC msg=audit(1496811013.149:1683): avc:  denied  { write } for  pid=10088 comm="grubby" name="log" dev="sda3" ino=617 scontext=system_u:system_r:kdumpgui_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_log_t:s0 tclass=dir permissive=0
SELinux is preventing grubby from 'read' accesses on the blk_file sr0.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that grubby should be allowed read access on the sr0 blk_file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'grubby' --raw | audit2allow -M my-grubby
# semodule -X 300 -i my-grubby.pp

Additional Information:
Source Context                system_u:system_r:kdumpgui_t:s0-s0:c0.c1023
Target Context                system_u:object_r:removable_device_t:s0
Target Objects                sr0 [ blk_file ]
Source                        grubby
Source Path                   grubby
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-225.16.fc25.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.11.3-200.fc25.x86_64 #1 SMP Thu
                              May 25 19:03:07 UTC 2017 x86_64 x86_64
Alert Count                   2
First Seen                    2017-06-07 10:20:12 IST
Last Seen                     2017-06-07 10:20:17 IST
Local ID                      7befdb7d-890d-41b8-8655-ee61ae0b608b

Raw Audit Messages
type=AVC msg=audit(1496811017.505:1684): avc:  denied  { read } for  pid=10087 comm="system-config-k" name="sr0" dev="devtmpfs" ino=11675 scontext=system_u:system_r:kdumpgui_t:s0-s0:c0.c1023 tcontext=system_u:object_r:removable_device_t:s0 tclass=blk_file permissive=0


Hash: grubby,kdumpgui_t,removable_device_t,blk_file,read

Version-Release number of selected component:
selinux-policy-3.13.1-225.16.fc25.noarch

Additional info:
reporter:       libreport-2.8.0
hashmarkername: setroubleshoot
kernel:         4.11.3-200.fc25.x86_64
type:           libreport

Potential duplicate: bug 1026644