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53 lines
1.6 KiB
Diff
53 lines
1.6 KiB
Diff
From d2c3a9ad53012bb3fd918fa0bd851da2bc092d8b Mon Sep 17 00:00:00 2001
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From: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
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Date: Thu, 28 Sep 2023 11:33:53 +0300
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Subject: [PATCH 0639/1002] media: rp1: cfe: Fix use of freed memory on errors
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cfe_probe_complete() calls cfe_put() on both success and fail code paths.
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This works for the success path, but causes the cfe_device struct to be
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freed, even if it will be used later in the teardown code.
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Fix this by making the ref handling a bit saner: Let the video nodes
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have the refs as they do now, but also keep a ref in the "main" driver,
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released only at cfe_remove() time. This way the driver does not depend
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on the video nodes keeping the refs.
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Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
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---
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drivers/media/platform/raspberrypi/rp1_cfe/cfe.c | 9 ++-------
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1 file changed, 2 insertions(+), 7 deletions(-)
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diff --git a/drivers/media/platform/raspberrypi/rp1_cfe/cfe.c b/drivers/media/platform/raspberrypi/rp1_cfe/cfe.c
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index 81c2098d64f6..fab0275cbbdb 100644
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--- a/drivers/media/platform/raspberrypi/rp1_cfe/cfe.c
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+++ b/drivers/media/platform/raspberrypi/rp1_cfe/cfe.c
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@@ -1837,17 +1837,10 @@ static int cfe_probe_complete(struct cfe_device *cfe)
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goto unregister;
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}
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- /*
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- * Release the initial reference, all references are now owned by the
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- * video devices.
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- */
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- cfe_put(cfe);
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return 0;
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unregister:
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cfe_unregister_nodes(cfe);
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- cfe_put(cfe);
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-
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return ret;
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}
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@@ -2129,6 +2122,8 @@ static int cfe_remove(struct platform_device *pdev)
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v4l2_device_unregister(&cfe->v4l2_dev);
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+ cfe_put(cfe);
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+
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return 0;
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}
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--
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2.44.0
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