* [PATCH] drm/amd/display: avoid null pointer dereference in dm_set_vblank
@ 2020-12-25 6:24 ` Defang Bo
0 siblings, 0 replies; 5+ messages in thread
From: Defang Bo @ 2020-12-25 6:24 UTC (permalink / raw)
To: airlied, daniel; +Cc: amd-gfx, dri-devel, linux-kernel, Defang Bo
[Why]
Similar to commit<dddc0557e>("drm/amd/display: Guard against null crtc in CRC IRQ"),
a null pointer deference can occur if crtc is null in
dm_set_vblank.
[How]
Check that CRTC is non-null before accessing its fields.
Signed-off-by: Defang Bo <bodefang@126.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index e2b23486..df23d28 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4875,10 +4875,17 @@ static inline int dm_set_vupdate_irq(struct drm_crtc *crtc, bool enable)
static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
{
enum dc_irq_source irq_source;
- struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
- struct amdgpu_device *adev = drm_to_adev(crtc->dev);
- struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
+ struct amdgpu_crtc *acrtc;
+ struct amdgpu_device *adev;
+ struct dm_crtc_state *acrtc_state;
int rc = 0;
+
+ if (crtc == NULL)
+ return rc;
+
+ acrtc = to_amdgpu_crtc(crtc);
+ adev = drm_to_adev(crtc->dev);
+ acrtc_state = to_dm_crtc_state(crtc->state);
if (enable) {
/* vblank irq on -> Only need vupdate irq in vrr mode */
--
2.7.4
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH] drm/amd/display: avoid null pointer dereference in dm_set_vblank
@ 2020-12-25 6:24 ` Defang Bo
0 siblings, 0 replies; 5+ messages in thread
From: Defang Bo @ 2020-12-25 6:24 UTC (permalink / raw)
To: airlied, daniel; +Cc: Defang Bo, dri-devel, amd-gfx, linux-kernel
[Why]
Similar to commit<dddc0557e>("drm/amd/display: Guard against null crtc in CRC IRQ"),
a null pointer deference can occur if crtc is null in
dm_set_vblank.
[How]
Check that CRTC is non-null before accessing its fields.
Signed-off-by: Defang Bo <bodefang@126.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index e2b23486..df23d28 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4875,10 +4875,17 @@ static inline int dm_set_vupdate_irq(struct drm_crtc *crtc, bool enable)
static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
{
enum dc_irq_source irq_source;
- struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
- struct amdgpu_device *adev = drm_to_adev(crtc->dev);
- struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
+ struct amdgpu_crtc *acrtc;
+ struct amdgpu_device *adev;
+ struct dm_crtc_state *acrtc_state;
int rc = 0;
+
+ if (crtc == NULL)
+ return rc;
+
+ acrtc = to_amdgpu_crtc(crtc);
+ adev = drm_to_adev(crtc->dev);
+ acrtc_state = to_dm_crtc_state(crtc->state);
if (enable) {
/* vblank irq on -> Only need vupdate irq in vrr mode */
--
2.7.4
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH] drm/amd/display: avoid null pointer dereference in dm_set_vblank
@ 2020-12-25 6:24 ` Defang Bo
0 siblings, 0 replies; 5+ messages in thread
From: Defang Bo @ 2020-12-25 6:24 UTC (permalink / raw)
To: airlied, daniel; +Cc: Defang Bo, dri-devel, amd-gfx, linux-kernel
[Why]
Similar to commit<dddc0557e>("drm/amd/display: Guard against null crtc in CRC IRQ"),
a null pointer deference can occur if crtc is null in
dm_set_vblank.
[How]
Check that CRTC is non-null before accessing its fields.
Signed-off-by: Defang Bo <bodefang@126.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index e2b23486..df23d28 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4875,10 +4875,17 @@ static inline int dm_set_vupdate_irq(struct drm_crtc *crtc, bool enable)
static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
{
enum dc_irq_source irq_source;
- struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
- struct amdgpu_device *adev = drm_to_adev(crtc->dev);
- struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
+ struct amdgpu_crtc *acrtc;
+ struct amdgpu_device *adev;
+ struct dm_crtc_state *acrtc_state;
int rc = 0;
+
+ if (crtc == NULL)
+ return rc;
+
+ acrtc = to_amdgpu_crtc(crtc);
+ adev = drm_to_adev(crtc->dev);
+ acrtc_state = to_dm_crtc_state(crtc->state);
if (enable) {
/* vblank irq on -> Only need vupdate irq in vrr mode */
--
2.7.4
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH] drm/amd/display: avoid null pointer dereference in dm_set_vblank
@ 2020-12-28 3:57 ` Defang Bo
0 siblings, 0 replies; 5+ messages in thread
From: Defang Bo @ 2020-12-28 3:57 UTC (permalink / raw)
To: airlied, daniel
Cc: nicholas.kazlauskas, Rodrigo.Siqueira, aurabindo.pillai,
stylon.wang, Bhawanpreet.Lakha, hersenxs.wu, amonakov,
luben.tuikov, amd-gfx, linux-kernel, Defang Bo
[Why]
Similar to commit<dddc0557e3a0>("drm/amd/display: Guard against null crtc in CRC IRQ"), a null pointer deference can occur if crtc is null in
dm_set_vblank.
[How]
Check that CRTC is non-null before accessing its fields.
Signed-off-by: Defang Bo <bodefang@126.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index e2b23486..f820962 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4875,11 +4875,19 @@ static inline int dm_set_vupdate_irq(struct drm_crtc *crtc, bool enable)
static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
{
enum dc_irq_source irq_source;
- struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
- struct amdgpu_device *adev = drm_to_adev(crtc->dev);
- struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
+ struct amdgpu_crtc *acrtc;
+ struct amdgpu_device *adev;
+ struct dm_crtc_state *acrtc_state;
int rc = 0;
+ if (crtc == NULL)
+ return -EINVAL;
+
+ acrtc = to_amdgpu_crtc(crtc);
+ adev = drm_to_adev(crtc->dev);
+ acrtc_state = to_dm_crtc_state(crtc->state);
+
+
if (enable) {
/* vblank irq on -> Only need vupdate irq in vrr mode */
if (amdgpu_dm_vrr_active(acrtc_state))
--
2.7.4
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH] drm/amd/display: avoid null pointer dereference in dm_set_vblank
@ 2020-12-28 3:57 ` Defang Bo
0 siblings, 0 replies; 5+ messages in thread
From: Defang Bo @ 2020-12-28 3:57 UTC (permalink / raw)
To: airlied, daniel
Cc: stylon.wang, luben.tuikov, amonakov, Rodrigo.Siqueira,
linux-kernel, amd-gfx, aurabindo.pillai, hersenxs.wu, Defang Bo,
Bhawanpreet.Lakha, nicholas.kazlauskas
[Why]
Similar to commit<dddc0557e3a0>("drm/amd/display: Guard against null crtc in CRC IRQ"), a null pointer deference can occur if crtc is null in
dm_set_vblank.
[How]
Check that CRTC is non-null before accessing its fields.
Signed-off-by: Defang Bo <bodefang@126.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index e2b23486..f820962 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4875,11 +4875,19 @@ static inline int dm_set_vupdate_irq(struct drm_crtc *crtc, bool enable)
static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
{
enum dc_irq_source irq_source;
- struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
- struct amdgpu_device *adev = drm_to_adev(crtc->dev);
- struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
+ struct amdgpu_crtc *acrtc;
+ struct amdgpu_device *adev;
+ struct dm_crtc_state *acrtc_state;
int rc = 0;
+ if (crtc == NULL)
+ return -EINVAL;
+
+ acrtc = to_amdgpu_crtc(crtc);
+ adev = drm_to_adev(crtc->dev);
+ acrtc_state = to_dm_crtc_state(crtc->state);
+
+
if (enable) {
/* vblank irq on -> Only need vupdate irq in vrr mode */
if (amdgpu_dm_vrr_active(acrtc_state))
--
2.7.4
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
^ permalink raw reply related [flat|nested] 5+ messages in thread
end of thread, other threads:[~2020-12-28 10:19 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2020-12-25 6:24 [PATCH] drm/amd/display: avoid null pointer dereference in dm_set_vblank Defang Bo
2020-12-25 6:24 ` Defang Bo
2020-12-25 6:24 ` Defang Bo
2020-12-28 3:57 Defang Bo
2020-12-28 3:57 ` Defang Bo
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