6.11-stable review patch. If anyone has any objections, please let me know.
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From: Jason Andryuk jason.andryuk@amd.com
commit c2af2a45560bd4046c2e109152acde029ed0acc2 upstream.
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@gmail.com Closes: https://lore.kernel.org/xen-devel/CALUcmUncX=LkXWeiSiTKsDY-cOe8QksWhFvcCneOK... Tested-by: Arthur Borsboom arthurborsboom@gmail.com CC: stable@vger.kernel.org Signed-off-by: Jason Andryuk jason.andryuk@amd.com Reviewed-by: Roger Pau Monné roger.pau@citrix.com Reviewed-by: Thomas Zimmermann tzimmermann@suse.de Signed-off-by: Helge Deller deller@gmx.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/video/fbdev/xen-fbfront.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/video/fbdev/xen-fbfront.c +++ b/drivers/video/fbdev/xen-fbfront.c @@ -407,6 +407,7 @@ static int xenfb_probe(struct xenbus_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;