[PATCH 04/21] udl-kms: fix crash due to uninitialized memory

[Mikulas Patocka]

We must use kzalloc when allocating the fb_deferred_io structure.
Otherwise, the field first_io is undefined and it causes a crash.

Signed-off-by: Mikulas Patocka <mpatocka at redhat.com>
Cc: stable at vger.kernel.org

---
 drivers/gpu/drm/udl/udl_fb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-4.16.12/drivers/gpu/drm/udl/udl_fb.c
===================================================================
--- linux-4.16.12.orig/drivers/gpu/drm/udl/udl_fb.c	2018-05-29 17:55:39.000000000 +0200
+++ linux-4.16.12/drivers/gpu/drm/udl/udl_fb.c	2018-05-29 17:55:39.000000000 +0200
@@ -221,7 +221,7 @@ static int udl_fb_open(struct fb_info *i
 
 		struct fb_deferred_io *fbdefio;
 
-		fbdefio = kmalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
+		fbdefio = kzalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
 
 		if (fbdefio) {
 			fbdefio->delay = DL_DEFIO_WRITE_DELAY;