Description of problem:
----------------------

After upgrading the Satellite Server from version 6.10 to 6.12, provisioning a Baremetal Cisco UCSX-210C-M6 using Full Host Image is failing since the host can't boot from the ISO.

The actual error that the customer gets is as follows -

error:/../../grub-core.script/lexer.c:352:syntax error.
error:/../../grub-core.script/lexer.c:352:Incorrect command.
error:/../../grub-core.script/lexer.c:352:syntax error.

Version-Release number of selected component (if applicable):
------------------------------------------------------------

Red Hat Satellite 6.12

Actual results:
--------------

Provisioning a Baremetal Cisco UCSX-210C-M6 using Full Host Image is fails.

Expected results:
----------------

Provisioning a Baremetal Cisco UCSX-210C-M6 using Full Host Image should be successful.

Additional info:
---------------

The provisioning was working as expected on Red Hat Satellite 6.10.

Thus, this might be a regression bug.

Provisioning fails with the error given in the problem description.

Following is the ISO structure which is generated on Satellite 6.12 and Satellite 6.10 -

Satellite 6.12 - NOT working
--------------

menuentry 'Foreman Bootdisk' {
linuxefi /BOOT/S_KICKSTART_8_6_7859_VMLINUZ BOOTIF=01-00-25-b5-76-a0-24 ks=http://sddvvrba378.612w.bns:8000/unattended/provision?static=1&token=4a39e689-5f17-441c-9572-1ef893f0fcae ip=10.92.101.25::10.92.101.1:255.255.255.192:sdpsvrbi827.scglobal.ad.scotiacapital.com::none nameserver=172.20.90.10 nameserver=172.22.1.30
initrdefi /BOOT/ICKSTART_8_6_7859_INITRD_IMG
}

Satellite 6.10 - It was working:
--------------
menuentry 'Foreman Bootdisk' {
linuxefi /BOOT/S_KICKSTART_8_6_7859_VMLINUZ ks=http://sddvvrba378.612w.bns:8000/unattended/provision?token=2974687b-db75-48ae-9107-4a8e4a084d2b BOOTIF=01-00-25-b5-76-a0-23 kssendmac ks.sendmac inst.ks.sendmac ip=10.92.101.24::10.92.101.1:255.255.255.192:sdpsvrbi826.scglobal.ad.scotiacapital.com::none nameserver=172.20.90.10 nameserver=172.22.1.30
initrdefi /BOOT/ICKSTART_8_6_7859_INITRD_IMG
}

In the Satellite 6.12 ISO structure, notice the presence of ampersand (&) in the URL in between static=1 and token=4a39... as follows -> static=1&token=4a39.

In the Satellite 6.10 ISO structure, ampersand (&) is not present.

The presence of this ampersand (&) is causing the issue as, Grub2 requires the ampersand "&" to be escaped or full argument to be quoted, as shown in the examples below -

Original URL (failing) -
----------------------

inst.ks=http://myserver.example.com/kickstarts/provision?token=someUUID&static=yes

Quoted URL -
----------

inst.ks="http://myserver.example.com/kickstarts/provision?token=someUUID&static=yes"

OR

inst.ks='http://myserver.example.com/kickstarts/provision?token=someUUID&static=yes'

Escaped ampersand "&" -
---------------------

inst.ks=http://myserver.example.com/kickstarts/provision?token=someUUID\&static=yes

• In grub, the & character without an escape is considered a word separation meta-character.

• In order to process the & as part of the URL and not a meta-character, it must be escaped or quoted.

Refer the following KCS article for additional details -

https://access.redhat.com/solutions/6810791