This is a note to let you know that I've just added the patch titled
NTB: ntb_transport: fix possible memory leak while device_register() fails
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ntb-ntb_transport-fix-possible-memory-leak-while-dev.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7b07412afefa9dcd30ba063fc844a1f2104b6fae
Author: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Date: Thu Nov 10 23:19:17 2022 +0800
NTB: ntb_transport: fix possible memory leak while device_register() fails
[ Upstream commit 8623ccbfc55d962e19a3537652803676ad7acb90 ]
If device_register() returns error, the name allocated by
dev_set_name() need be freed. As comment of device_register()
says, it should use put_device() to give up the reference in
the error path. So fix this by calling put_device(), then the
name can be freed in kobject_cleanup(), and client_dev is freed
in ntb_transport_client_release().
Fixes: fce8a7bb5b4b ("PCI-Express Non-Transparent Bridge Support")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Signed-off-by: Jon Mason <jdmason@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 9398959664769..2d647a1cd0ee5 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -393,7 +393,7 @@ int ntb_transport_register_client_dev(char *device_name)
rc = device_register(dev);
if (rc) {
- kfree(client_dev);
+ put_device(dev);
goto err;
}
