* [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr
@ 2019-11-15 9:47 Colin King
2019-11-15 9:47 ` Colin King
2019-11-18 6:56 ` Quan, Evan
0 siblings, 2 replies; 5+ messages in thread
From: Colin King @ 2019-11-15 9:47 UTC (permalink / raw)
To: Rex Zhu, Evan Quan, Alex Deucher, Christian König,
David Zhou, David Airlie, Daniel Vetter, amd-gfx, dri-devel
Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
The assignment of adev dereferences pointer hwmgr before hwmgr is null
checked, hence there is a potential null pointer deference issue. Fix
this by assigning adev after the null check.
Addresses-Coverity: ("Dereference before null check")
Fixes: 0896d2f7ba4d ("drm/amdgpu/powerplay: properly set PP_GFXOFF_MASK")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
index 443625c83ec9..d2909c91d65b 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
@@ -81,7 +81,7 @@ static void hwmgr_init_workload_prority(struct pp_hwmgr *hwmgr)
int hwmgr_early_init(struct pp_hwmgr *hwmgr)
{
- struct amdgpu_device *adev = hwmgr->adev;
+ struct amdgpu_device *adev;
if (!hwmgr)
return -EINVAL;
@@ -96,6 +96,8 @@ int hwmgr_early_init(struct pp_hwmgr *hwmgr)
hwmgr_init_workload_prority(hwmgr);
hwmgr->gfxoff_state_changed_by_workload = false;
+ adev = hwmgr->adev;
+
switch (hwmgr->chip_family) {
case AMDGPU_FAMILY_CI:
adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
--
2.20.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr
2019-11-15 9:47 [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr Colin King
@ 2019-11-15 9:47 ` Colin King
2019-11-18 6:56 ` Quan, Evan
1 sibling, 0 replies; 5+ messages in thread
From: Colin King @ 2019-11-15 9:47 UTC (permalink / raw)
To: Rex Zhu, Evan Quan, Alex Deucher, Christian König,
David Zhou, David Airlie, Daniel Vetter, amd-gfx, dri-devel
Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
The assignment of adev dereferences pointer hwmgr before hwmgr is null
checked, hence there is a potential null pointer deference issue. Fix
this by assigning adev after the null check.
Addresses-Coverity: ("Dereference before null check")
Fixes: 0896d2f7ba4d ("drm/amdgpu/powerplay: properly set PP_GFXOFF_MASK")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
index 443625c83ec9..d2909c91d65b 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
@@ -81,7 +81,7 @@ static void hwmgr_init_workload_prority(struct pp_hwmgr *hwmgr)
int hwmgr_early_init(struct pp_hwmgr *hwmgr)
{
- struct amdgpu_device *adev = hwmgr->adev;
+ struct amdgpu_device *adev;
if (!hwmgr)
return -EINVAL;
@@ -96,6 +96,8 @@ int hwmgr_early_init(struct pp_hwmgr *hwmgr)
hwmgr_init_workload_prority(hwmgr);
hwmgr->gfxoff_state_changed_by_workload = false;
+ adev = hwmgr->adev;
+
switch (hwmgr->chip_family) {
case AMDGPU_FAMILY_CI:
adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
--
2.20.1
_______________________________________________
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
* RE: [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr
2019-11-15 9:47 [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr Colin King
2019-11-15 9:47 ` Colin King
@ 2019-11-18 6:56 ` Quan, Evan
2019-11-18 17:47 ` Alex Deucher
1 sibling, 1 reply; 5+ messages in thread
From: Quan, Evan @ 2019-11-18 6:56 UTC (permalink / raw)
To: Colin King, Rex Zhu, Deucher, Alexander, Koenig, Christian, Zhou,
David(ChunMing),
David Airlie, Daniel Vetter, amd-gfx, dri-devel
Cc: kernel-janitors, linux-kernel
Reviewed-by: Evan Quan <evan.quan@amd.com>
-----Original Message-----
From: Colin King <colin.king@canonical.com>
Sent: Friday, November 15, 2019 5:48 PM
To: Rex Zhu <rex.zhu@amd.com>; Quan, Evan <Evan.Quan@amd.com>; Deucher, Alexander <Alexander.Deucher@amd.com>; Koenig, Christian <Christian.Koenig@amd.com>; Zhou, David(ChunMing) <David1.Zhou@amd.com>; David Airlie <airlied@linux.ie>; Daniel Vetter <daniel@ffwll.ch>; amd-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org
Cc: kernel-janitors@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr
From: Colin Ian King <colin.king@canonical.com>
The assignment of adev dereferences pointer hwmgr before hwmgr is null checked, hence there is a potential null pointer deference issue. Fix this by assigning adev after the null check.
Addresses-Coverity: ("Dereference before null check")
Fixes: 0896d2f7ba4d ("drm/amdgpu/powerplay: properly set PP_GFXOFF_MASK")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
index 443625c83ec9..d2909c91d65b 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
@@ -81,7 +81,7 @@ static void hwmgr_init_workload_prority(struct pp_hwmgr *hwmgr)
int hwmgr_early_init(struct pp_hwmgr *hwmgr) {
- struct amdgpu_device *adev = hwmgr->adev;
+ struct amdgpu_device *adev;
if (!hwmgr)
return -EINVAL;
@@ -96,6 +96,8 @@ int hwmgr_early_init(struct pp_hwmgr *hwmgr)
hwmgr_init_workload_prority(hwmgr);
hwmgr->gfxoff_state_changed_by_workload = false;
+ adev = hwmgr->adev;
+
switch (hwmgr->chip_family) {
case AMDGPU_FAMILY_CI:
adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
--
2.20.1
_______________________________________________
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
* Re: [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr
2019-11-18 6:56 ` Quan, Evan
@ 2019-11-18 17:47 ` Alex Deucher
2019-11-18 17:47 ` Alex Deucher
0 siblings, 1 reply; 5+ messages in thread
From: Alex Deucher @ 2019-11-18 17:47 UTC (permalink / raw)
To: Quan, Evan
Cc: Colin King, Rex Zhu, Deucher, Alexander, Koenig, Christian, Zhou,
David(ChunMing),
David Airlie, Daniel Vetter, amd-gfx, dri-devel, kernel-janitors,
linux-kernel
Applied. Thanks!
Alex
On Mon, Nov 18, 2019 at 1:56 AM Quan, Evan <Evan.Quan@amd.com> wrote:
>
> Reviewed-by: Evan Quan <evan.quan@amd.com>
>
> -----Original Message-----
> From: Colin King <colin.king@canonical.com>
> Sent: Friday, November 15, 2019 5:48 PM
> To: Rex Zhu <rex.zhu@amd.com>; Quan, Evan <Evan.Quan@amd.com>; Deucher, Alexander <Alexander.Deucher@amd.com>; Koenig, Christian <Christian.Koenig@amd.com>; Zhou, David(ChunMing) <David1.Zhou@amd.com>; David Airlie <airlied@linux.ie>; Daniel Vetter <daniel@ffwll.ch>; amd-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org
> Cc: kernel-janitors@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr
>
> From: Colin Ian King <colin.king@canonical.com>
>
> The assignment of adev dereferences pointer hwmgr before hwmgr is null checked, hence there is a potential null pointer deference issue. Fix this by assigning adev after the null check.
>
> Addresses-Coverity: ("Dereference before null check")
> Fixes: 0896d2f7ba4d ("drm/amdgpu/powerplay: properly set PP_GFXOFF_MASK")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
> index 443625c83ec9..d2909c91d65b 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
> @@ -81,7 +81,7 @@ static void hwmgr_init_workload_prority(struct pp_hwmgr *hwmgr)
>
> int hwmgr_early_init(struct pp_hwmgr *hwmgr) {
> - struct amdgpu_device *adev = hwmgr->adev;
> + struct amdgpu_device *adev;
>
> if (!hwmgr)
> return -EINVAL;
> @@ -96,6 +96,8 @@ int hwmgr_early_init(struct pp_hwmgr *hwmgr)
> hwmgr_init_workload_prority(hwmgr);
> hwmgr->gfxoff_state_changed_by_workload = false;
>
> + adev = hwmgr->adev;
> +
> switch (hwmgr->chip_family) {
> case AMDGPU_FAMILY_CI:
> adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
> --
> 2.20.1
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr
2019-11-18 17:47 ` Alex Deucher
@ 2019-11-18 17:47 ` Alex Deucher
0 siblings, 0 replies; 5+ messages in thread
From: Alex Deucher @ 2019-11-18 17:47 UTC (permalink / raw)
To: Quan, Evan
Cc: David Airlie, kernel-janitors, linux-kernel, amd-gfx, dri-devel,
Deucher, Alexander, Colin King, Rex Zhu, Koenig, Christian
Applied. Thanks!
Alex
On Mon, Nov 18, 2019 at 1:56 AM Quan, Evan <Evan.Quan@amd.com> wrote:
>
> Reviewed-by: Evan Quan <evan.quan@amd.com>
>
> -----Original Message-----
> From: Colin King <colin.king@canonical.com>
> Sent: Friday, November 15, 2019 5:48 PM
> To: Rex Zhu <rex.zhu@amd.com>; Quan, Evan <Evan.Quan@amd.com>; Deucher, Alexander <Alexander.Deucher@amd.com>; Koenig, Christian <Christian.Koenig@amd.com>; Zhou, David(ChunMing) <David1.Zhou@amd.com>; David Airlie <airlied@linux.ie>; Daniel Vetter <daniel@ffwll.ch>; amd-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org
> Cc: kernel-janitors@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr
>
> From: Colin Ian King <colin.king@canonical.com>
>
> The assignment of adev dereferences pointer hwmgr before hwmgr is null checked, hence there is a potential null pointer deference issue. Fix this by assigning adev after the null check.
>
> Addresses-Coverity: ("Dereference before null check")
> Fixes: 0896d2f7ba4d ("drm/amdgpu/powerplay: properly set PP_GFXOFF_MASK")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
> index 443625c83ec9..d2909c91d65b 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
> @@ -81,7 +81,7 @@ static void hwmgr_init_workload_prority(struct pp_hwmgr *hwmgr)
>
> int hwmgr_early_init(struct pp_hwmgr *hwmgr) {
> - struct amdgpu_device *adev = hwmgr->adev;
> + struct amdgpu_device *adev;
>
> if (!hwmgr)
> return -EINVAL;
> @@ -96,6 +96,8 @@ int hwmgr_early_init(struct pp_hwmgr *hwmgr)
> hwmgr_init_workload_prority(hwmgr);
> hwmgr->gfxoff_state_changed_by_workload = false;
>
> + adev = hwmgr->adev;
> +
> switch (hwmgr->chip_family) {
> case AMDGPU_FAMILY_CI:
> adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
> --
> 2.20.1
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2019-11-18 17:48 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2019-11-15 9:47 [PATCH][next] drm/amdgpu/powerplay: fix dereference before null check of pointer hwmgr Colin King
2019-11-15 9:47 ` Colin King
2019-11-18 6:56 ` Quan, Evan
2019-11-18 17:47 ` Alex Deucher
2019-11-18 17:47 ` Alex Deucher
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