* [PATCH] drm/msm: potential error pointer dereference in init()
@ 2021-10-04 10:38 Dan Carpenter
2021-10-04 23:33 ` abhinavk
2021-10-04 23:35 ` Dmitry Baryshkov
0 siblings, 2 replies; 3+ messages in thread
From: Dan Carpenter @ 2021-10-04 10:38 UTC (permalink / raw)
To: Rob Clark, Jordan Crouse
Cc: Sean Paul, David Airlie, Daniel Vetter, Dmitry Baryshkov,
Abhinav Kumar, Viresh Kumar, Bjorn Andersson, Kalyan Thota,
Xu Wang, Jonathan Marek, Yangtao Li, linux-arm-msm, dri-devel,
freedreno, kernel-janitors
The msm_iommu_new() returns error pointers on failure so check for that
to avoid an Oops.
Fixes: ccac7ce373c1 ("drm/msm: Refactor address space initialization")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index ae48f41821cf..ad247c06e198 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -908,6 +908,10 @@ static int _dpu_kms_mmu_init(struct dpu_kms *dpu_kms)
return 0;
mmu = msm_iommu_new(dpu_kms->dev->dev, domain);
+ if (IS_ERR(mmu)) {
+ iommu_domain_free(domain);
+ return PTR_ERR(mmu);
+ }
aspace = msm_gem_address_space_create(mmu, "dpu1",
0x1000, 0x100000000 - 0x1000);
--
2.20.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] drm/msm: potential error pointer dereference in init()
2021-10-04 10:38 [PATCH] drm/msm: potential error pointer dereference in init() Dan Carpenter
@ 2021-10-04 23:33 ` abhinavk
2021-10-04 23:35 ` Dmitry Baryshkov
1 sibling, 0 replies; 3+ messages in thread
From: abhinavk @ 2021-10-04 23:33 UTC (permalink / raw)
To: Dan Carpenter
Cc: Rob Clark, Jordan Crouse, Sean Paul, David Airlie, Daniel Vetter,
Dmitry Baryshkov, Viresh Kumar, Bjorn Andersson, Kalyan Thota,
Xu Wang, Jonathan Marek, Yangtao Li, linux-arm-msm, dri-devel,
freedreno, kernel-janitors
On 2021-10-04 03:38, Dan Carpenter wrote:
> The msm_iommu_new() returns error pointers on failure so check for that
> to avoid an Oops.
>
> Fixes: ccac7ce373c1 ("drm/msm: Refactor address space initialization")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index ae48f41821cf..ad247c06e198 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -908,6 +908,10 @@ static int _dpu_kms_mmu_init(struct dpu_kms
> *dpu_kms)
> return 0;
>
> mmu = msm_iommu_new(dpu_kms->dev->dev, domain);
> + if (IS_ERR(mmu)) {
> + iommu_domain_free(domain);
> + return PTR_ERR(mmu);
> + }
> aspace = msm_gem_address_space_create(mmu, "dpu1",
> 0x1000, 0x100000000 - 0x1000);
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] drm/msm: potential error pointer dereference in init()
2021-10-04 10:38 [PATCH] drm/msm: potential error pointer dereference in init() Dan Carpenter
2021-10-04 23:33 ` abhinavk
@ 2021-10-04 23:35 ` Dmitry Baryshkov
1 sibling, 0 replies; 3+ messages in thread
From: Dmitry Baryshkov @ 2021-10-04 23:35 UTC (permalink / raw)
To: Dan Carpenter, Rob Clark, Jordan Crouse
Cc: Sean Paul, David Airlie, Daniel Vetter, Abhinav Kumar,
Viresh Kumar, Bjorn Andersson, Kalyan Thota, Xu Wang,
Jonathan Marek, Yangtao Li, linux-arm-msm, dri-devel, freedreno,
kernel-janitors
On 04/10/2021 13:38, Dan Carpenter wrote:
> The msm_iommu_new() returns error pointers on failure so check for that
> to avoid an Oops.
>
> Fixes: ccac7ce373c1 ("drm/msm: Refactor address space initialization")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index ae48f41821cf..ad247c06e198 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -908,6 +908,10 @@ static int _dpu_kms_mmu_init(struct dpu_kms *dpu_kms)
> return 0;
>
> mmu = msm_iommu_new(dpu_kms->dev->dev, domain);
> + if (IS_ERR(mmu)) {
> + iommu_domain_free(domain);
> + return PTR_ERR(mmu);
> + }
> aspace = msm_gem_address_space_create(mmu, "dpu1",
> 0x1000, 0x100000000 - 0x1000);
>
>
--
With best wishes
Dmitry
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-10-04 10:38 [PATCH] drm/msm: potential error pointer dereference in init() Dan Carpenter
2021-10-04 23:33 ` abhinavk
2021-10-04 23:35 ` Dmitry Baryshkov
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