diff options
| author | Colin Ian King <colin.king@canonical.com> | 2019-12-16 16:21:36 +0000 |
|---|---|---|
| committer | Patrik Jakobsson <patrik.r.jakobsson@gmail.com> | 2019-12-19 15:33:40 +0100 |
| commit | 7da5492739db745d935a7044288a7307a0fb7f29 (patch) | |
| tree | 4524d43aad2223bf1baa69f8ec78e0e642d8da8c | |
| parent | 24f03be4aa7922ef5c6067d2809c5d90dfe275c9 (diff) | |
drm/gma500: fix null dereference of pointer fb before null check
Pointer fb is being dereferenced when assigning dev before it
is null checked. Fix this by only dereferencing dev after the
null check.
Fixes: 6b7ce2c4161a ("drm/gma500: Remove struct psb_fbdev")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191216162136.270114-1-colin.king@canonical.com
| -rw-r--r-- | drivers/gpu/drm/gma500/accel_2d.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/gma500/accel_2d.c b/drivers/gpu/drm/gma500/accel_2d.c index b9e5a38632f7..adc0507545bf 100644 --- a/drivers/gpu/drm/gma500/accel_2d.c +++ b/drivers/gpu/drm/gma500/accel_2d.c @@ -228,8 +228,8 @@ static void psbfb_copyarea_accel(struct fb_info *info, { struct drm_fb_helper *fb_helper = info->par; struct drm_framebuffer *fb = fb_helper->fb; - struct drm_device *dev = fb->dev; - struct drm_psb_private *dev_priv = dev->dev_private; + struct drm_device *dev; + struct drm_psb_private *dev_priv; uint32_t offset; uint32_t stride; uint32_t src_format; @@ -238,6 +238,8 @@ static void psbfb_copyarea_accel(struct fb_info *info, if (!fb) return; + dev = fb->dev; + dev_priv = dev->dev_private; offset = to_gtt_range(fb->obj[0])->offset; stride = fb->pitches[0]; |