diff options
| author | Yang Yingliang <yangyingliang@huawei.com> | 2022-11-19 11:11:34 +0300 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2022-11-21 13:57:41 +0300 |
| commit | f92a4b50f0bd7fd52391dc4bb9a309085d278f91 (patch) | |
| tree | a1ae08f87f16b436c0a745b80d5da701d3bad520 /drivers/hv | |
| parent | c234ba8042920fa83635808dc5673f36869ca280 (diff) | |
| download | linux-f92a4b50f0bd7fd52391dc4bb9a309085d278f91.tar.xz | |
Drivers: hv: vmbus: fix double free in the error path of vmbus_add_channel_work()
In the error path of vmbus_device_register(), device_unregister()
is called, which calls vmbus_device_release(). The latter frees
the struct hv_device that was passed in to vmbus_device_register().
So remove the kfree() in vmbus_add_channel_work() to avoid a double
free.
Fixes: c2e5df616e1a ("vmbus: add per-channel sysfs info")
Suggested-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20221119081135.1564691-2-yangyingliang@huawei.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv')
| -rw-r--r-- | drivers/hv/channel_mgmt.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 5b120402d405..cc23b90cae02 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -533,13 +533,17 @@ static void vmbus_add_channel_work(struct work_struct *work) * Add the new device to the bus. This will kick off device-driver * binding which eventually invokes the device driver's AddDevice() * method. + * + * If vmbus_device_register() fails, the 'device_obj' is freed in + * vmbus_device_release() as called by device_unregister() in the + * error path of vmbus_device_register(). In the outside error + * path, there's no need to free it. */ ret = vmbus_device_register(newchannel->device_obj); if (ret != 0) { pr_err("unable to add child device object (relid %d)\n", newchannel->offermsg.child_relid); - kfree(newchannel->device_obj); goto err_deq_chan; } |