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Message-ID: <20221112092924.3608240-2-yangyingliang@huawei.com>
Date: Sat, 12 Nov 2022 17:29:24 +0800
From: Yang Yingliang <yangyingliang@...wei.com>
To: <linux-kernel@...r.kernel.org>
CC: <linux@...inikbrodowski.net>
Subject: [PATCH 2/2] pcmcia: ds: fix possible name leak in error path in pcmcia_device_add()
Afer commit 1fa5ae857bb1 ("driver core: get rid of struct device's
bus_id string array"), the name of device is allocated dynamically,
it need bee freed.
As comment of device_register() says, it should use put_device() to
give up the reference in the error path, some resources is going to
freed in pcmcia_release_dev(), so don't use error label, just return
NULL after calling put_device().
Before device_initialize(), it can not call put_device(), so move the
dev_set_name() before device_register().
Fixes: 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
drivers/pcmcia/ds.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index 7d3258a1f8f8..a249d9a0457b 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -513,9 +513,6 @@ static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
/* by default don't allow DMA */
p_dev->dma_mask = 0;
p_dev->dev.dma_mask = &p_dev->dma_mask;
- dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
- if (!dev_name(&p_dev->dev))
- goto err_free;
p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
if (!p_dev->devname)
goto err_free;
@@ -573,8 +570,17 @@ static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
pcmcia_device_query(p_dev);
- if (device_register(&p_dev->dev))
+ dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
+ if (!dev_name(&p_dev->dev))
goto err_put_ref;
+ if (device_register(&p_dev->dev)) {
+ mutex_lock(&s->ops_mutex);
+ list_del(&p_dev->socket_device_list);
+ s->device_count--;
+ mutex_unlock(&s->ops_mutex);
+ put_device(&p_dev->dev);
+ return NULL;
+ }
return p_dev;
--
2.25.1
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