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udl-kms: fix crash due to uninitialized memory

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commit 09a00abe3a 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 <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mikulas Patocka
2018-06-03 16:40:57 +02:00
committed by Greg Kroah-Hartman
parent 86c18c5a4b
commit c0357c1895
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/udl/udl_fb.c
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@@ -221,7 +221,7 @@ static int udl_fb_open(struct fb_info *info, int user)
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;