From: Yang Yingliang yangyingliang@huawei.com

mainline inclusion from mainline-v6.3-rc1 commit e5da06b27ff5a148e42265c8e306670a9d913969 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I9MMNG

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

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The normal call sequence of using transport class is:

Add path: transport_setup_device() transport_setup_classdev() // call sas_host_setup() here transport_add_device() // if fails, need call transport_destroy_device() transport_configure_device()

Remove path: transport_remove_device() transport_remove_classdev // call sas_host_remove() here transport_destroy_device()

If transport_add_device() fails, need call transport_destroy_device() to free memory, but in this case, ->remove() is not called, and the resources allocated in ->setup() are leaked. So fix these leaks by calling ->remove() in transport_add_class_device() if it returns error.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Yang Yingliang yangyingliang@huawei.com Link: https://lore.kernel.org/r/20221115031638.3816551-1-yangyingliang@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: dinglongwei dinglongwei1@huawei.com --- drivers/base/transport_class.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/base/transport_class.c b/drivers/base/transport_class.c index ccc86206e508..09ee2a1e35bb 100644 --- a/drivers/base/transport_class.c +++ b/drivers/base/transport_class.c @@ -155,12 +155,27 @@ static int transport_add_class_device(struct attribute_container *cont, struct device *dev, struct device *classdev) { + struct transport_class *tclass = class_to_transport_class(cont->class); int error = attribute_container_add_class_device(classdev); struct transport_container *tcont = attribute_container_to_transport_container(cont);

- if (!error && tcont->statistics) + if (error) + goto err_remove; + + if (tcont->statistics) { error = sysfs_create_group(&classdev->kobj, tcont->statistics); + if (error) + goto err_del; + } + + return 0; + +err_del: + attribute_container_class_device_del(classdev); +err_remove: + if (tclass->remove) + tclass->remove(tcont, dev, classdev);

return error; }