From: Miaoqian Lin linmq006@gmail.com
stable inclusion from stable-v5.10.102 commit 91d8866ca55232d21995a3d54fac96de33c9e20c bugzilla: https://gitee.com/openeuler/kernel/issues/I567K6
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 8bc69f86328e87a0ffa79438430cc82f3aa6a194 ]
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: c2e5df616e1a ("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 Signed-off-by: Yu Liao liaoyu15@huawei.com Reviewed-by: Wei Li liwei391@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/hv/vmbus_drv.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index a5a402e776c7..362da2a83b47 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1944,8 +1944,10 @@ int vmbus_add_channel_kobj(struct hv_device *dev, struct vmbus_channel *channel) kobj->kset = dev->channels_kset; ret = kobject_init_and_add(kobj, &vmbus_chan_ktype, NULL, "%u", relid); - if (ret) + if (ret) { + kobject_put(kobj); return ret; + }
ret = sysfs_create_group(kobj, &vmbus_chan_group);
@@ -1954,6 +1956,7 @@ int vmbus_add_channel_kobj(struct hv_device *dev, struct vmbus_channel *channel) * The calling functions' error handling paths will cleanup the * empty channel directory. */ + kobject_put(kobj); dev_err(device, "Unable to set up channel sysfs files\n"); return ret; }