| Message ID | 20170812015515.GA8360@embeddedgus (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Aug 11, 2017 at 08:55:15PM -0500, Gustavo A. R. Silva wrote: > 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> Applied to drm-misc-next, thanks. -Daniel > --- > drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c b/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c > index 1616af2..c50534c 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 > -- > 2.5.0 > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel
diff --git a/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c b/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c index 1616af2..c50534c 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
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> --- drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)