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SubjectRe: [PATCH] drm/amdgpu: fix memory leak
Date
Am 04.10.19 um 13:00 schrieb Das, Nirmoy:
> On 10/4/19 12:44 PM, Koenig, Christian wrote:
>> First of all please send mails regarding amdgpu to the amd-gfx mailing
>> list and not lkml/dri-devel.
> Okay.
>> Am 04.10.19 um 12:17 schrieb Nirmoy Das:
>>> In amdgpu_bo_list_ioctl when idr_alloc fails
>>> don't return without freeing bo list entry.
>>>
>>> Fixes: 964d0fbf6301d ("drm/amdgpu: Allow to create BO lists in CS ioctl v3")
>>>
>>> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
>>> ---
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c | 2 +-
>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
>>> index 7bcf86c61999..c3e5ea544857 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
>>> @@ -284,7 +284,7 @@ int amdgpu_bo_list_ioctl(struct drm_device *dev, void *data,
>>> mutex_unlock(&fpriv->bo_list_lock);
>>> if (r < 0) {
>>> amdgpu_bo_list_put(list);
>>> - return r;
>>> + goto error_free;
>> NAK, that is a double free. The bo list entries are freed by
>> amdgpu_bo_list_put().
> Thanks, didn't realize that.

Wait a second, what entries are you talking about?

The entries in the list object are freed when amdgpu_bo_list_put() is
called, but the temporary info array with the handles needs to be freed
as well.

And it looks like that is indeed leaked here.

Regards,
Christian.

>> Regards,
>> Christian.
> Regards,
>
> Nirmoy
>
>>> }
>>>
>>> handle = r;

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