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From:   Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
To:     Harry Wentland <harry.wentland@amd.com>,
        Leo Li <sunpeng.li@amd.com>,
        Alex Deucher <alexander.deucher@amd.com>,
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        "David (ChunMing) Zhou" <David1.Zhou@amd.com>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Sherry Yang <sherry.yang@oracle.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Sasha Levin <sashal@kernel.org>, Roman Li <roman.li@amd.com>,
        Claudio Suarez <cssk@net-c.es>, hongao <hongao@uniontech.com>,
        Aurabindo Pillai <aurabindo.pillai@amd.com>,
        amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
        linux-kernel@vger.kernel.org
Cc:     dan.carpenter@linaro.org, kernel-janitors@vger.kernel.org,
        error27@gmail.com, harshit.m.mogalapalli@oracle.com
Subject: [PATCH] drm/amd/display: Fix memory leak in dm_set_writeback()
Date:   Fri,  8 Dec 2023 01:58:24 -0800
Message-ID: <20231208095825.1291730-1-harshit.m.mogalapalli@oracle.com>
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'wb_info' needs to be freed on error paths or it would leak the memory.

Smatch pointed this out.

Fixes: c81e13b929df ("drm/amd/display: Hande writeback request from userspace")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
---
This is based on static analysis and only compile tested
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index afdcc43ea06c..333995f70239 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8871,12 +8871,14 @@ static void dm_set_writeback(struct amdgpu_display_manager *dm,
 	acrtc = to_amdgpu_crtc(wb_conn->encoder.crtc);
 	if (!acrtc) {
 		DRM_ERROR("no amdgpu_crtc found\n");
+		kfree(wb_info);
 		return;
 	}
 
 	afb = to_amdgpu_framebuffer(new_con_state->writeback_job->fb);
 	if (!afb) {
 		DRM_ERROR("No amdgpu_framebuffer found\n");
+		kfree(wb_info);
 		return;
 	}
 
-- 
2.39.3