git: 93ebd6307efe - main - vt: panic while changing vt font

[Toomas Soome]

The branch main has been updated by tsoome:

URL: https://cgit.FreeBSD.org/src/commit/?id=93ebd6307efeb95a29bc614edd0c67c2af850e98

commit 93ebd6307efeb95a29bc614edd0c67c2af850e98
Author:     Toomas Soome <tsoome at FreeBSD.org>
AuthorDate: 2021-01-24 18:59:36 +0000
Commit:     Toomas Soome <tsoome at FreeBSD.org>
CommitDate: 2021-01-26 23:07:03 +0000

    vt: panic while changing vt font
    
    Set refcount for loader provided font to 1 to prevent this font
    from being released (so we can reset to default).
    
    PR: 252833
---
 sys/dev/vt/vt_core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/dev/vt/vt_core.c b/sys/dev/vt/vt_core.c
index 2352ed823424..ac89d8635e78 100644
--- a/sys/dev/vt/vt_core.c
+++ b/sys/dev/vt/vt_core.c
@@ -1528,6 +1528,8 @@ parse_font_info(struct font_info *fi)
 	ptr = roundup2(ptr, 8);
 
 	vfp = &vt_font_loader;
+	/* This is default font, set refcount 1 to disable removal. */
+	vfp->vf_refcount = 1;
 	vfp->vf_height = fi->fi_height;
 	vfp->vf_width = fi->fi_width;
 	for (unsigned i = 0; i < VFNT_MAPS; i++) {