In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/lib/conf-migrate/upgrade-run.d/bandwidth line 8:

. /lib/rcscripts/sh/error.sh

  ^------------------------^ SC1091 (info): Not following: /lib/rcscripts/sh/error.sh was not specified as input (see shellcheck -x).

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/lib/conf-migrate/upgrade-run.d/bandwidth line 14:

[ $# -gt 0 ] && [ -d $1 ] || error "Argument is not a valid directory!"

             ^-- SC2015 (info): Note that A && B || C is not if-then-else. C may run when A is true.

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

Did you mean: 

[ $# -gt 0 ] && [ -d "$1" ] || error "Argument is not a valid directory!"

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/lib/conf-migrate/upgrade-run.d/bandwidth line 17:

if [ -f $1$pre_10_2_cf ] && [ -r $1$pre_10_2_cf ]; then

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

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

Did you mean: 

if [ -f "$1"$pre_10_2_cf ] && [ -r "$1"$pre_10_2_cf ]; then

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/lib/conf-migrate/upgrade-run.d/bandwidth line 18:

	if [ $(stat -c %U $1$pre_10_2_cf) != root ] &&

             ^--------------------------^ SC2046 (warning): Quote this to prevent word splitting.

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

Did you mean: 

	if [ $(stat -c %U "$1"$pre_10_2_cf) != root ] &&

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/lib/conf-migrate/upgrade-run.d/bandwidth line 19:

			[ $(stat -c %U $1$pre_10_2_cf) != netd ]; then

                          ^--------------------------^ SC2046 (warning): Quote this to prevent word splitting.

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

Did you mean: 

			[ $(stat -c %U "$1"$pre_10_2_cf) != netd ]; then

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/lib/conf-migrate/upgrade-run.d/bandwidth line 22:

	cp $1$pre_10_2_cf $bandwidth_cf

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

Did you mean: 

	cp "$1"$pre_10_2_cf $bandwidth_cf

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/lib/conf-migrate/upgrade-run.d/bandwidth line 26:

	cp $1$bandwidth_cf $bandwidth_cf

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

Did you mean: 

	cp "$1"$bandwidth_cf $bandwidth_cf

For more information:

  https://www.shellcheck.net/wiki/SC2046 -- Quote this to prevent word splitt...

  https://www.shellcheck.net/wiki/SC1091 -- Not following: /lib/rcscripts/sh/...

  https://www.shellcheck.net/wiki/SC2015 -- Note that A && B || C is not if-t...