git: 85d8155e9526 - stable/13 - kboot: Disks should be at least 16MB

The branch stable/13 has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=85d8155e952613e03ab444947405ec0d9183e3b0

commit 85d8155e952613e03ab444947405ec0d9183e3b0
Author:     Warner Losh <imp@FreeBSD.org>
AuthorDate: 2022-12-13 05:39:03 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2023-01-24 21:49:45 +0000

    kboot: Disks should be at least 16MB
    
    Linux pre-boot environments will often have a number of psuedo disks
    that are small, all smaller than a few MB. 16MB is a good cutoff since
    it's big enough to filter these devices, yet small enough to allow a
    super-minimal partition through (the smallest I've been able to make
    that's useful lately is around 20MB).
    
    Sponsored by:           Netflix
    
    (cherry picked from commit 0386255bee079922f00f37eeb4e9e3138b7666c1)
---
 stand/kboot/hostdisk.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/stand/kboot/hostdisk.c b/stand/kboot/hostdisk.c
index bc31bef8e6d0..628450ef8bb5 100644
--- a/stand/kboot/hostdisk.c
+++ b/stand/kboot/hostdisk.c
@@ -60,6 +60,8 @@ struct devsw hostdisk = {
  */
 #define SYSBLK "/sys/block"
 
+#define HOSTDISK_MIN_SIZE (16ul << 20)	/* 16MB */
+
 typedef STAILQ_HEAD(, hdinfo) hdinfo_list_t;
 typedef struct hdinfo {
 	STAILQ_ENTRY(hdinfo)	hd_link;	/* link in device list */
@@ -162,6 +164,8 @@ hostdisk_add_drive(const char *drv, uint64_t secs)
 	if (!file2u64(fn, &hd->hd_sectorsize))
 		goto err;
 	hd->hd_size = hd->hd_sectors * hd->hd_sectorsize;
+	if (hd->hd_size < HOSTDISK_MIN_SIZE)
+		goto err;
 	hd->hd_flags = 0;
 	STAILQ_INIT(&hd->hd_children);
 	printf("/dev/%s: %ju %ju %ju\n",