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@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
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;
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