net: wwan: iosm: fix memory leak in ipc_wwan_dellink

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: net: wwan: iosm: fix memory leak in ipc_wwan_dellink IOSM driver registers network device without setting the needs_free_netdev flag, and does NOT call free_netdev() when unregisters network device, which causes a memory leak. This patch sets needs_free_netdev to true when registers network device, which makes netdev subsystem call free_netdev() automatically after unregister_netdevice().

References

• https://git.kernel.org/stable/c/2ce2348c2858d723f7fe389dead9b43b08e0944e
• https://git.kernel.org/stable/c/128514b51a5ba2c82f9e4a106f1c10423907618a
• https://git.kernel.org/stable/c/f25caaca424703d5a0607310f0452f978f1f78d9