nfc: fix segfault in nfc_genl_dump_devices_done

In the Linux kernel, the following vulnerability has been resolved:

nfc: fix segfault in nfc_genl_dump_devices_done

When kmalloc in nfc_genl_dump_devices() fails then

nfc_genl_dump_devices_done() segfaults as below

KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]

CPU: 0 PID: 25 Comm: kworker/0:1 Not tainted 5.16.0-rc4-01180-g2a987e65025e-dirty #5

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-6.fc35 04/01/2014

Workqueue: events netlink_sock_destruct_work

RIP: 0010:klist_iter_exit+0x26/0x80

Call Trace:

<TASK>

class_dev_iter_exit+0x15/0x20

nfc_genl_dump_devices_done+0x3b/0x50

genl_lock_done+0x84/0xd0

netlink_sock_destruct+0x8f/0x270

__sk_destruct+0x64/0x3b0

sk_destruct+0xa8/0xd0

__sk_free+0x2e8/0x3d0

sk_free+0x51/0x90

netlink_sock_destruct_work+0x1c/0x20

process_one_work+0x411/0x710

worker_thread+0x6fd/0xa80