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Wed, 22 Jun 2022 18:45:50 -0700 (PDT) Received: from [192.168.50.247] ([103.84.139.165]) by smtp.gmail.com with ESMTPSA id d26-20020a63735a000000b0040cba7ef9b9sm6901613pgn.9.2022.06.22.18.45.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 22 Jun 2022 18:45:49 -0700 (PDT) Message-ID: Date: Thu, 23 Jun 2022 09:45:46 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: [PATCH] gpu: drm: fix possible memory leak in drm_addmap_core() Content-Language: en-US From: Hangyu Hua To: maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@linux.ie, daniel@ffwll.ch Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20220509054441.17282-1-hbh25y@gmail.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2022/5/23 09:57, Hangyu Hua wrote: > On 2022/5/9 13:44, Hangyu Hua wrote: >> map->handle need to be handled correctly when map->type is _DRM_SHM or >> _DRM_CONSISTENT just like map->type is _DRM_REGISTERS. >> >> Fixes: 8d153f7107ff ("drm: update user token hashing and map handles") >> Signed-off-by: Hangyu Hua >> --- >>   drivers/gpu/drm/drm_bufs.c | 18 ++++++++++++++++++ >>   1 file changed, 18 insertions(+) >> >> diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c >> index fcca21e8efac..2b3f504c5f9c 100644 >> --- a/drivers/gpu/drm/drm_bufs.c >> +++ b/drivers/gpu/drm/drm_bufs.c >> @@ -344,6 +344,15 @@ static int drm_addmap_core(struct drm_device >> *dev, resource_size_t offset, >>       if (!list) { >>           if (map->type == _DRM_REGISTERS) >>               iounmap(map->handle); >> +        else if (map->type == _DRM_SHM) { >> +            dev->sigdata.lock = dev->master->lock.hw_lock = NULL; >> +            vfree(map->handle); >> +        } else if (map->type == _DRM_CONSISTENT) { >> +            dma_free_coherent(dev->dev, >> +                      map->size, >> +                      map->handle, >> +                      map->offset); >> +        } >>           kfree(map); >>           return -EINVAL; >>       } >> @@ -361,6 +370,15 @@ static int drm_addmap_core(struct drm_device >> *dev, resource_size_t offset, >>       if (ret) { >>           if (map->type == _DRM_REGISTERS) >>               iounmap(map->handle); >> +        else if (map->type == _DRM_SHM) { >> +            dev->sigdata.lock = dev->master->lock.hw_lock = NULL; >> +            vfree(map->handle); >> +        } else if (map->type == _DRM_CONSISTENT) { >> +            dma_free_coherent(dev->dev, >> +                      map->size, >> +                      map->handle, >> +                      map->offset); >> +        } >>           kfree(map); >>           kfree(list); >>           mutex_unlock(&dev->struct_mutex); > > Gentel ping. Gentel ping.