| Message ID | 20240909063359.1197065-1-make24@iscas.ac.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [RESEND] drm/sti: avoid potential dereference of error pointers in sti_gdp_atomic_check | expand |
Hi, Thank you for your patch. Acked-by: Alain Volmat <alain.volmat@foss.st.com> Regards, Alain On Mon, Sep 09, 2024 at 02:33:59PM +0800, Ma Ke wrote: > The return value of drm_atomic_get_crtc_state() needs to be > checked. To avoid use of error pointer 'crtc_state' in case > of the failure. > > Cc: stable@vger.kernel.org > Fixes: dd86dc2f9ae1 ("drm/sti: implement atomic_check for the planes") > Signed-off-by: Ma Ke <make24@iscas.ac.cn> > --- > drivers/gpu/drm/sti/sti_gdp.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/sti/sti_gdp.c b/drivers/gpu/drm/sti/sti_gdp.c > index 43c72c2604a0..f046f5f7ad25 100644 > --- a/drivers/gpu/drm/sti/sti_gdp.c > +++ b/drivers/gpu/drm/sti/sti_gdp.c > @@ -638,6 +638,9 @@ static int sti_gdp_atomic_check(struct drm_plane *drm_plane, > > mixer = to_sti_mixer(crtc); > crtc_state = drm_atomic_get_crtc_state(state, crtc); > + if (IS_ERR(crtc_state)) > + return PTR_ERR(crtc_state); > + > mode = &crtc_state->mode; > dst_x = new_plane_state->crtc_x; > dst_y = new_plane_state->crtc_y; > -- > 2.25.1 >
diff --git a/drivers/gpu/drm/sti/sti_gdp.c b/drivers/gpu/drm/sti/sti_gdp.c index 43c72c2604a0..f046f5f7ad25 100644 --- a/drivers/gpu/drm/sti/sti_gdp.c +++ b/drivers/gpu/drm/sti/sti_gdp.c @@ -638,6 +638,9 @@ static int sti_gdp_atomic_check(struct drm_plane *drm_plane, mixer = to_sti_mixer(crtc); crtc_state = drm_atomic_get_crtc_state(state, crtc); + if (IS_ERR(crtc_state)) + return PTR_ERR(crtc_state); + mode = &crtc_state->mode; dst_x = new_plane_state->crtc_x; dst_y = new_plane_state->crtc_y;
The return value of drm_atomic_get_crtc_state() needs to be checked. To avoid use of error pointer 'crtc_state' in case of the failure. Cc: stable@vger.kernel.org Fixes: dd86dc2f9ae1 ("drm/sti: implement atomic_check for the planes") Signed-off-by: Ma Ke <make24@iscas.ac.cn> --- drivers/gpu/drm/sti/sti_gdp.c | 3 +++ 1 file changed, 3 insertions(+)