From: Jason Andryuk <jason.andryuk@xxxxxxx>
Probing xen-fbfront faults in video_is_primary_device(). The passed-in
struct device is NULL since xen-fbfront doesn't assign it and the
memory is kzalloc()-ed. Assign fb_info->device to avoid this.
This was exposed by the conversion of fb_is_primary_device() to
video_is_primary_device() which dropped a NULL check for struct device.
Fixes: f178e96de7f0 ("arch: Remove struct fb_info from video helpers")
Reported-by: Arthur Borsboom <arthurborsboom@xxxxxxxxx>
Closes: https://lore.kernel.org/xen-devel/CALUcmUncX=LkXWeiSiTKsDY-cOe8QksWhFvcCneOKfrKd0ZajA@xxxxxxxxxxxxxx/
Tested-by: Arthur Borsboom <arthurborsboom@xxxxxxxxx>
CC: stable@xxxxxxxxxxxxxxx
Signed-off-by: Jason Andryuk <jason.andryuk@xxxxxxx>
---
The other option would be to re-instate the NULL check in
video_is_primary_device()
---
drivers/video/fbdev/xen-fbfront.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/video/fbdev/xen-fbfront.c b/drivers/video/fbdev/xen-fbfront.c
index 66d4628a96ae..c90f48ebb15e 100644
--- a/drivers/video/fbdev/xen-fbfront.c
+++ b/drivers/video/fbdev/xen-fbfront.c
@@ -407,6 +407,7 @@ static int xenfb_probe(struct xenbus_device *dev,
/* complete the abuse: */
fb_info->pseudo_palette = fb_info->par;
fb_info->par = info;
+ fb_info->device = &dev->dev;
fb_info->screen_buffer = info->fb;
--
2.43.0
