From: Miaoqian Lin <linmq006@gmail.com>
To: "K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: linmq006@gmail.com
Subject: [PATCH] Drivers: hv: vmbus: Fix memory leak in vmbus_add_channel_kobj
Date: Wed, 26 Jan 2022 05:52:46 +0000 [thread overview]
Message-ID: <20220126055247.8125-1-linmq006@gmail.com> (raw)
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>
---
drivers/hv/vmbus_drv.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 17bf55fe3169..9e055697783b 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -2028,8 +2028,10 @@ 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);
--
2.17.1
next reply other threads:[~2022-01-26 5:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-26 5:52 Miaoqian Lin [this message]
2022-01-28 21:56 ` [PATCH] Drivers: hv: vmbus: Fix memory leak in vmbus_add_channel_kobj Juan Vazquez
2022-02-03 12:44 ` Wei Liu
2022-02-03 17:30 ` [PATCH v2] " Miaoqian Lin
2022-02-06 14:55 ` Juan Vazquez
2022-02-07 17:54 ` Wei Liu
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