* [PATCH 4.14 103/193] drm/msm: a5xx: fix possible object reference leak
[not found] <20190530030446.953835040@linuxfoundation.org>
@ 2019-05-30 3:05 ` Greg Kroah-Hartman
0 siblings, 0 replies; only message in thread
From: Greg Kroah-Hartman @ 2019-05-30 3:05 UTC (permalink / raw)
To: linux-kernel
Cc: dri-devel, freedreno, Thomas Zimmermann, Sasha Levin,
David Airlie, Greg Kroah-Hartman, Sharat Masetty, stable,
Mamta Shukla, linux-arm-msm, Rob Clark, Sean Paul, Wen Yang
[ Upstream commit 6cd5235c3135ea84b32469ea51b2aae384eda8af ]
The call to of_get_child_by_name returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.
Detected by coccinelle with the following warnings:
drivers/gpu/drm/msm/adreno/a5xx_gpu.c:57:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 47, but without a corresponding object release within this function.
drivers/gpu/drm/msm/adreno/a5xx_gpu.c:66:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 47, but without a corresponding object release within this function.
drivers/gpu/drm/msm/adreno/a5xx_gpu.c:118:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 47, but without a corresponding object release within this function.
drivers/gpu/drm/msm/adreno/a5xx_gpu.c:57:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 51, but without a corresponding object release within this function.
drivers/gpu/drm/msm/adreno/a5xx_gpu.c:66:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 51, but without a corresponding object release within this function.
drivers/gpu/drm/msm/adreno/a5xx_gpu.c:118:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 51, but without a corresponding object release within this function.
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Jordan Crouse <jcrouse@codeaurora.org>
Cc: Mamta Shukla <mamtashukla555@gmail.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Sharat Masetty <smasetty@codeaurora.org>
Cc: linux-arm-msm@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: freedreno@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org (open list)
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index 17c59d839e6fa..f1aaa76cc2e4e 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -29,7 +29,7 @@ static void a5xx_dump(struct msm_gpu *gpu);
static int zap_shader_load_mdt(struct device *dev, const char *fwname)
{
const struct firmware *fw;
- struct device_node *np;
+ struct device_node *np, *mem_np;
struct resource r;
phys_addr_t mem_phys;
ssize_t mem_size;
@@ -43,11 +43,13 @@ static int zap_shader_load_mdt(struct device *dev, const char *fwname)
if (!np)
return -ENODEV;
- np = of_parse_phandle(np, "memory-region", 0);
- if (!np)
+ mem_np = of_parse_phandle(np, "memory-region", 0);
+ of_node_put(np);
+ if (!mem_np)
return -EINVAL;
- ret = of_address_to_resource(np, 0, &r);
+ ret = of_address_to_resource(mem_np, 0, &r);
+ of_node_put(mem_np);
if (ret)
return ret;
--
2.20.1
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