From: Wentao Liang <vulab@iscas.ac.cn>
To: b-liu@ti.com, gregkh@linuxfoundation.org
Cc: linux-usb@vger.kernel.org, linux-omap@vger.kernel.org,
linux-kernel@vger.kernel.org, Wentao Liang <vulab@iscas.ac.cn>,
stable@vger.kernel.org
Subject: [PATCH] usb: musb: omap2430: Fix use-after-free in omap2430_probe()
Date: Thu, 9 Apr 2026 10:11:04 +0000 [thread overview]
Message-ID: <20260409101104.480623-1-vulab@iscas.ac.cn> (raw)
In omap2430_probe(), of_node_put(np) is called prematurely before the
last access to np, leading to a use-after-free if the node's reference
count drops to zero. Move the of_node_put() calls after the last use of
np in both the success and error paths.
Fixes: ffbe2feac59b ("usb: musb: omap2430: Fix probe regression for missing resources")
Cc: stable@vger.kernel.org
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
---
drivers/usb/musb/omap2430.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 48bb9bfb2204..333ab79f0ca9 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -337,7 +337,6 @@ static int omap2430_probe(struct platform_device *pdev)
} else {
device_set_of_node_from_dev(&musb->dev, &pdev->dev);
}
- of_node_put(np);
glue->dev = &pdev->dev;
glue->musb = musb;
@@ -455,6 +454,7 @@ static int omap2430_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "failed to register musb device\n");
goto err_disable_rpm;
}
+ of_node_put(np);
return 0;
@@ -464,6 +464,7 @@ static int omap2430_probe(struct platform_device *pdev)
if (!IS_ERR(glue->control_otghs))
put_device(glue->control_otghs);
err_put_musb:
+ of_node_put(np);
platform_device_put(musb);
return ret;
--
2.34.1
reply other threads:[~2026-04-09 10:11 UTC|newest]
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