CVE-2021-47180

In the Linux kernel, the following vulnerability has been resolved: NFC:
nci: fix memory leak in nci_allocate_device nfcmrvl_disconnect fails to
free the hci_dev field in struct nci_dev. Fix this by freeing hci_dev in
nci_free_device. BUG: memory leak unreferenced object 0xffff888111ea6800
(size 1024): comm “kworker/1:0”, pid 19, jiffies 4294942308 (age 13.580s)
hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 60 fd 0c 81 88 ff ff
…`… 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
… backtrace: [<000000004bc25d43>] kmalloc
include/linux/slab.h:552 [inline] [<000000004bc25d43>] kzalloc
include/linux/slab.h:682 [inline] [<000000004bc25d43>]
nci_hci_allocate+0x21/0xd0 net/nfc/nci/hci.c:784 [<00000000c59cff92>]
nci_allocate_device net/nfc/nci/core.c:1170 [inline] [<00000000c59cff92>]
nci_allocate_device+0x10b/0x160 net/nfc/nci/core.c:1132
[<00000000006e0a8e>] nfcmrvl_nci_register_dev+0x10a/0x1c0
drivers/nfc/nfcmrvl/main.c:153 [<000000004da1b57e>]
nfcmrvl_probe+0x223/0x290 drivers/nfc/nfcmrvl/usb.c:345
[<00000000d506aed9>] usb_probe_interface+0x177/0x370
drivers/usb/core/driver.c:396 [<00000000bc632c92>] really_probe+0x159/0x4a0
drivers/base/dd.c:554 [<00000000f5009125>] driver_probe_device+0x84/0x100
drivers/base/dd.c:740 [<000000000ce658ca>]
__device_attach_driver+0xee/0x110 drivers/base/dd.c:846
[<000000007067d05f>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
[<00000000f8e13372>] __device_attach+0x122/0x250 drivers/base/dd.c:914
[<000000009cf68860>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
[<00000000359c965a>] device_add+0x5be/0xc30 drivers/base/core.c:3109
[<00000000086e4bd3>] usb_set_configuration+0x9d9/0xb90
drivers/usb/core/message.c:2164 [<00000000ca036872>]
usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
[<00000000d40d36f6>] usb_probe_device+0x5c/0x140
drivers/usb/core/driver.c:293 [<00000000bc632c92>] really_probe+0x159/0x4a0
drivers/base/dd.c:554