From f9574cd48679926e2a569e1957a5a1bcc8a719ac Mon Sep 17 00:00:00 2001 From: Yang Yingliang Date: Mon, 14 Nov 2022 23:26:35 +0800 Subject: [PATCH] rapidio: fix possible name leaks when rio_add_device() fails 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 Cc: Alexandre Bounine Cc: Matt Porter Signed-off-by: Andrew Morton --- drivers/rapidio/devices/rio_mport_cdev.c | 7 +++++-- drivers/rapidio/rio-scan.c | 8 ++++++-- 2 files changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c index 2cdc054e53a5..3cc83997a1f8 100644 --- a/drivers/rapidio/devices/rio_mport_cdev.c +++ b/drivers/rapidio/devices/rio_mport_cdev.c @@ -1804,8 +1804,11 @@ 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 19b0c33f4a62..fdcf742b2adb 100644 --- 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);