Drivers: hv: vmbus: Fix memory leak in vmbus_add_channel_kobj

stable inclusion
from stable-v4.19.231
commit 417947891bd5ae327f15efed1a0da2b12ef24962
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/IADGF1
CVE: CVE-2022-48775

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=417947891bd5ae327f15efed1a0da2b12ef24962



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[ Upstream commit 8bc69f86 ]

kobject_init_and_add() takes reference even when it fails.
According to the doc of kobject_init_and_add()：

   If this function returns an error, kobject_put() must be called to
   properly clean up the memory associated with the object.

Fix memory leak by calling kobject_put().

Fixes: c2e5df61 ("vmbus: add per-channel sysfs info")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Juan Vazquez <juvazq@linux.microsoft.com>
Link: https://lore.kernel.org/r/20220203173008.43480-1-linmq006@gmail.com


Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Conflicts:
	drivers/hv/vmbus_drv.c
[LST patch b57705c0ec not merge to this branch]

Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>