diff options
| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2017-08-11 20:55:15 -0500 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-08-18 09:10:46 +0200 |
| commit | 3c2c42eb47f2e2272e0cc244751cd312e18d5142 (patch) | |
| tree | cf6b9382823e50bd1ec6d8eacf0148199e55cff4 /drivers/gpu/drm/gma500 | |
| parent | f3bbc908e87384785c26b6fa71d1c0beb126797c (diff) | |
| download | linux-3c2c42eb47f2e2272e0cc244751cd312e18d5142.tar.bz2 | |
drm/gma500: fix potential NULL pointer dereference dereference
NULL check at line 528: if (!sender || !data_out || !len_out) {, implies
that pointer _sender_ might be NULL.
Move pointer _sender_ dereference after NULL check in order to avoid a
potential NULL pointer dereference.
This issue was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20170812015515.GA8360@embeddedgus
Diffstat (limited to 'drivers/gpu/drm/gma500')
| -rw-r--r-- | drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c b/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c index 1616af209bfc..c50534c923df 100644 --- a/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c +++ b/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c @@ -520,7 +520,7 @@ static int __read_panel_data(struct mdfld_dsi_pkg_sender *sender, u8 data_type, u8 *data, u16 len, u32 *data_out, u16 len_out, bool hs) { unsigned long flags; - struct drm_device *dev = sender->dev; + struct drm_device *dev; int i; u32 gen_data_reg; int retry = MDFLD_DSI_READ_MAX_COUNT; @@ -530,6 +530,8 @@ static int __read_panel_data(struct mdfld_dsi_pkg_sender *sender, u8 data_type, return -EINVAL; } + dev = sender->dev; + /** * do reading. * 0) send out generic read request |