linux-kernel - [PATCH] drm/amdgpu: fix multiple memory leaks

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Date:   Wed, 18 Sep 2019 11:09:41 -0500
From:   Navid Emamdoost <navid.emamdoost@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     emamd001@....edu, smccaman@....edu, kjlu@....edu,
        Navid Emamdoost <navid.emamdoost@...il.com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Rex Zhu <Rex.Zhu@....com>,
        Sam Ravnborg <sam@...nborg.org>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/amdgpu: fix multiple memory leaks

In acp_hw_init there are some allocations that needs to be released in
case of failure:

1- adev->acp.acp_genpd should be released if any allocation attemp for
adev->acp.acp_cell, adev->acp.acp_res or i2s_pdata fails.
2- all of those allocations should be released if pm_genpd_add_device
fails.

Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
index eba42c752bca..dd3fa85b11c5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
@@ -231,17 +231,21 @@ static int acp_hw_init(void *handle)
 	adev->acp.acp_cell = kcalloc(ACP_DEVS, sizeof(struct mfd_cell),
 							GFP_KERNEL);
 
-	if (adev->acp.acp_cell == NULL)
+	if (adev->acp.acp_cell == NULL) {
+		kfree(adev->acp.acp_genpd);
 		return -ENOMEM;
+	}
 
 	adev->acp.acp_res = kcalloc(5, sizeof(struct resource), GFP_KERNEL);
 	if (adev->acp.acp_res == NULL) {
+		kfree(adev->acp.acp_genpd);
 		kfree(adev->acp.acp_cell);
 		return -ENOMEM;
 	}
 
 	i2s_pdata = kcalloc(3, sizeof(struct i2s_platform_data), GFP_KERNEL);
 	if (i2s_pdata == NULL) {
+		kfree(adev->acp.acp_genpd);
 		kfree(adev->acp.acp_res);
 		kfree(adev->acp.acp_cell);
 		return -ENOMEM;
@@ -348,6 +352,10 @@ static int acp_hw_init(void *handle)
 		r = pm_genpd_add_device(&adev->acp.acp_genpd->gpd, dev);
 		if (r) {
 			dev_err(dev, "Failed to add dev to genpd\n");
+			kfree(adev->acp.acp_genpd);
+			kfree(adev->acp.acp_res);
+			kfree(adev->acp.acp_cell);
+			kfree(i2s_pdata);
 			return r;
 		}
 	}
-- 
2.17.1