On Wed, 23 Nov 2022 20:27:14 -0400, Jason Gunthorpe wrote:
> This will cause an informative backtrace to print if the user of
> ib_device_set_netdev() isn't careful about tearing down the ibdevice
> before its the netdevice parent is destroyed. Such as like this:
>
> unregister_netdevice: waiting for vlan0 to become free. Usage count = 2
> leaked reference.
> ib_device_set_netdev+0x266/0x730
> siw_newlink+0x4e0/0xfd0
> nldev_newlink+0x35c/0x5c0
> rdma_nl_rcv_msg+0x36d/0x690
> rdma_nl_rcv+0x2ee/0x430
> netlink_unicast+0x543/0x7f0
> netlink_sendmsg+0x918/0xe20
> sock_sendmsg+0xcf/0x120
> ____sys_sendmsg+0x70d/0x8b0
> ___sys_sendmsg+0x11d/0x1b0
> __sys_sendmsg+0xfa/0x1d0
> do_syscall_64+0x35/0xb0
> entry_SYSCALL_64_after_hwframe+0x63/0xcd
>
> [...]
Applied, thanks!
[1/1] RDMA: Add netdevice_tracker to ib_device_set_netdev()
https://git.kernel.org/rdma/rdma/c/09f530f0c6d668
Best regards,
--
Leon Romanovsky <leon@xxxxxxxxxx>
