In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.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/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.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/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/libexec/sshdgenkeys.sh line 27:

		fsynced_write_or_cleanup "$f" "$ecdsa_key${f#$ecdsa_key_tmp}"

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

Did you mean: 

		fsynced_write_or_cleanup "$f" "$ecdsa_key${f#"$ecdsa_key_tmp"}"

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/libexec/sshdgenkeys.sh line 33:

		fsynced_write_or_cleanup "$f" "$rsa_key${f#$rsa_key_tmp}"

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

Did you mean: 

		fsynced_write_or_cleanup "$f" "$rsa_key${f#"$rsa_key_tmp"}"

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/libexec/sshdgenkeys.sh line 37:

[ -f "$ecdsa_key" -a -f "$rsa_key" ] || error "$0: key generation failed"

                  ^-- SC2166 (warning): Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.

For more information:

  https://www.shellcheck.net/wiki/SC2166 -- Prefer [ p ] && [ q ] as [ p -a q...

  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...