git: a78bc42bcc31 - main - reboot: Disallow -k and -r, it doesn't make sense.

The branch main has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=a78bc42bcc31f04fdb3319f7b11c6d8da5a30bee

commit a78bc42bcc31f04fdb3319f7b11c6d8da5a30bee
Author:     Warner Losh <imp@FreeBSD.org>
AuthorDate: 2024-02-12 18:44:43 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2024-02-12 18:44:43 +0000

    reboot: Disallow -k and -r, it doesn't make sense.
    
    When we're re-rooting to a new /, there is no next kernel. Error out
    rather than leaving a timebomb in /boot/nextboot.conf.
    
    Sponsored by:           Netflix
    Reviewed by:            kevans, kib, emaste
    Differential Revision:  https://reviews.freebsd.org/D43800
---
 sbin/reboot/reboot.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sbin/reboot/reboot.c b/sbin/reboot/reboot.c
index 7daf38b88a3e..90c67caf9d07 100644
--- a/sbin/reboot/reboot.c
+++ b/sbin/reboot/reboot.c
@@ -115,6 +115,8 @@ main(int argc, char *argv[])
 		errx(1, "-c and -p cannot be used together");
 	if ((howto & RB_REROOT) != 0 && howto != RB_REROOT)
 		errx(1, "-r cannot be used with -c, -d, -n, or -p");
+	if ((howto & RB_REROOT) != 0 && kernel != NULL)
+		errx(1, "-r and -k cannot be used together, there is no next kernel");
 	if (geteuid()) {
 		errno = EPERM;
 		err(1, NULL);