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MS-DOS: Check font pointer for null

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The 16 color mode loads the font specified in font_map, and accepts it
only if its size is 8 by 16 pixels. This change avoids a null
dereference if the font is not found.
This commit is contained in:
Ray Chason
2026-07-02 21:34:35 -04:00
parent aaf601ffc8
commit ae8982fe3e
1 changed files with 1 additions and 1 deletions
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sys/msdos/vidvga.c
+1 -1
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@@ -811,7 +811,7 @@ vga_Init(void)
} }
free_font(psf_font); free_font(psf_font);
psf_font = load_font(font_name); psf_font = load_font(font_name);
if (psf_font->width != 8 || psf_font->height != 16) { if (psf_font != NULL && psf_font->width != 8 || psf_font->height != 16) {
raw_printf("VGA mode only supports 8x16 fonts"); raw_printf("VGA mode only supports 8x16 fonts");
free_font(psf_font); free_font(psf_font);
psf_font = NULL; psf_font = NULL;