rapidio: fix possible name leaks when rio_add_device() fails

[ Upstream commit f9574cd48679926e2a569e1957a5a1bcc8a719ac ]

Patch series "rapidio: fix three possible memory leaks".

This patchset fixes three name leaks in error handling.
 - patch #1 fixes two name leaks while rio_add_device() fails.
 - patch #2 fixes a name leak while  rio_register_mport() fails.

This patch (of 2):

If rio_add_device() returns error, the name allocated by dev_set_name()
need be freed.  It should use put_device() to give up the reference in the
error path, so that the name can be freed in kobject_cleanup(), and the
'rdev' can be freed in rio_release_dev().

Link: https://lkml.kernel.org/r/20221114152636.2939035-1-yangyingliang@huawei.com
Link: https://lkml.kernel.org/r/20221114152636.2939035-2-yangyingliang@huawei.com
Fixes: e8de370188d0 ("rapidio: add mport char device driver")
Fixes: 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c
index 94331d9..48cd9b7 100644 (file)
--- a/drivers/rapidio/devices/rio_mport_cdev.c
+++ b/drivers/rapidio/devices/rio_mport_cdev.c
@@ -1803,8 +1803,11 @@ static int rio_mport_add_riodev(struct mport_cdev_priv *priv,
                rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE],
                                   0, 0xffff);
        err = rio_add_device(rdev);
-       if (err)
-               goto cleanup;
+       if (err) {
+               put_device(&rdev->dev);
+               return err;
+       }
+
        rio_dev_get(rdev);
 
        return 0;

diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c
index 19b0c33..fdcf742 100644 (file)
--- a/drivers/rapidio/rio-scan.c
+++ b/drivers/rapidio/rio-scan.c
@@ -454,8 +454,12 @@ static struct rio_dev *rio_setup_device(struct rio_net *net,
                                   0, 0xffff);
 
        ret = rio_add_device(rdev);
-       if (ret)
-               goto cleanup;
+       if (ret) {
+               if (rswitch)
+                       kfree(rswitch->route_table);
+               put_device(&rdev->dev);
+               return NULL;
+       }
 
        rio_dev_get(rdev);