4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mikulas Patocka <[email protected]>

commit 09a00abe3a9941c2715ca83eb88172cd2f54d8fd upstream.

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 <[email protected]>
Cc: [email protected]
Signed-off-by: Dave Airlie <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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

--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -341,7 +341,7 @@ 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;


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