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Date:   Sat, 11 Mar 2023 19:24:56 +0000
From:   Danila Chernetsov <listdansp@...l.ru>
To:     Alex Deucher <alexander.deucher@....com>
Cc:     Danila Chernetsov <listdansp@...l.ru>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        lvc-project@...uxtesting.org
Subject: 

Date: Sat, 11 Mar 2023 19:00:03 +0000
Subject: [PATCH 5.10 1/1] drm/amdgpu: add error handling for drm_fb_helper_initial_config

The type of return value of drm_fb_helper_initial_config is int, which may return wrong result, so we add error handling for it to reclaim memory resource,
and return when an error occurs.                               

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: d38ceaf99ed0 (drm/amdgpu: add core driver (v4))
Signed-off-by: Danila Chernetsov <listdansp@...l.ru>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
index 43f29ee0e3b0..e445a2c9f569 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
@@ -348,8 +348,17 @@ int amdgpu_fbdev_init(struct amdgpu_device *adev)
 	if (!amdgpu_device_has_dc_support(adev))
 		drm_helper_disable_unused_functions(adev_to_drm(adev));
 
-	drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
-	return 0;
+	ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
+	if (ret)
+		goto fini;
+
+	return 0;
+
+fini:
+	drm_fb_helper_fini(&rfbdev->helper);
+
+	kfree(rfbdev);
+	return ret;
 }
 
 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
-- 
2.25.1