linux-kernel - [PATCH] drm/amdgpu: Fix memory leak in amdgpu_fence

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Date:   Mon, 21 Oct 2019 13:09:40 -0500
From:   Navid Emamdoost <navid.emamdoost@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     emamd001@....edu, kjlu@....edu, smccaman@....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>, Evan Quan <evan.quan@....com>,
        Hawking Zhang <Hawking.Zhang@....com>,
        Sam Ravnborg <sam@...nborg.org>, Jack Xiao <Jack.Xiao@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] drm/amdgpu: Fix memory leak in amdgpu_fence_emit

In the impelementation of amdgpu_fence_emit() if dma_fence_wait() fails
and returns an errno, before returning the allocated memory for fence
should be released.

Fixes: 3d2aca8c8620 ("drm/amdgpu: fix old fence check in amdgpu_fence_emit")
Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
index 23085b352cf2..2f59c9270a7e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
@@ -166,8 +166,10 @@ int amdgpu_fence_emit(struct amdgpu_ring *ring, struct dma_fence **f,
 		if (old) {
 			r = dma_fence_wait(old, false);
 			dma_fence_put(old);
-			if (r)
+			if (r) {
+				dma_fence_put(fence);
 				return r;
+			}
 		}
 	}
 
-- 
2.17.1