[PATCH 5.15 470/731] firmware: raspberrypi: fix possible memory leak in rpi_firmware_probe()

Greg Kroah-Hartman
2022-12-28T15:29:20Z

From: Yang Yingliang <yangyingliang@huawei.com>

[ Upstream commit 7b51161696e803fd5f9ad55b20a64c2df313f95c ]

In rpi_firmware_probe(), if mbox_request_channel() fails, the 'fw' will
not be freed through rpi_firmware_delete(), fix this leak by calling
kfree() in the error path.

Fixes: 1e7c57355a3b ("firmware: raspberrypi: Keep count of all consumers")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221117070636.3849773-1-yangyingliang@huawei.com
Acked-by: Joel Savitz <jsavitz@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/firmware/raspberrypi.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c
index 4b8978b254f9..dba315f675bc 100644
--- a/drivers/firmware/raspberrypi.c
+++ b/drivers/firmware/raspberrypi.c
@@ -272,6 +272,7 @@ static int rpi_firmware_probe(struct platform_device *pdev)
int ret = PTR_ERR(fw->chan);
if (ret != -EPROBE_DEFER)
dev_err(dev, "Failed to get mbox channel: %d\n", ret);
+ kfree(fw);
return ret;
}

--
2.35.1