In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/sshdgenkeys.sh line 5:

. /lib/rcscripts/sh/files.sh

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

In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/sshdgenkeys.sh line 7:

[ $# -eq 1 ] && [ "$1" ] || error "$0: missing or empty argument"

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

In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/sshdgenkeys.sh line 10:

rm -f $t*

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

Did you mean: 

rm -f "$t"*

In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/sshdgenkeys.sh line 11:

ssh-keygen -q -t rsa -f $t -N '' -b 2048 || error "$0: key generation failed"

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

Did you mean: 

ssh-keygen -q -t rsa -f "$t" -N '' -b 2048 || error "$0: key generation failed"

In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/sshdgenkeys.sh line 12:

for f in $t*; do

         ^-- SC2231 (info): Quote expansions in this for loop glob to prevent wordsplitting, e.g. "$dir"/*.txt .

In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/libexec/sshdgenkeys.sh line 13:

	fsynced_write_or_cleanup $f $1${f#$t}

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

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

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

                                          ^-- SC2295 (info): Expansions inside ${..} need to be quoted separately, otherwise they match as patterns.

Did you mean: 

	fsynced_write_or_cleanup "$f" "$1""${f#"$t"}"

For more information:

  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...

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