In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/etc/ppp/ip-up line 17:

	echo $1 | sed -re 's,\.,\\.,g'

             ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

	echo "$1" | sed -re 's,\.,\\.,g'

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/etc/ppp/ip-up line 23:

		grep -q "nameserver *$(addBS $dns)" $RESOLV_CONF || echo "nameserver $dns" >> $RESOLV_CONF

                                             ^--^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

		grep -q "nameserver *$(addBS "$dns")" $RESOLV_CONF || echo "nameserver $dns" >> $RESOLV_CONF

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/etc/ppp/ip-up line 30:

addDNS $DNS1

       ^---^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

addDNS "$DNS1"

In /logs/firmware/patool_extraction/DUMP/mtdblock8_unblob_extracted/mtdblock8_extract/0-9650176.squashfs_v4_le_extract/etc/ppp/ip-up line 31:

addDNS $DNS2

       ^---^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

addDNS "$DNS2"

For more information:

  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...