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: [] kmalloc include/linux/slab.h:552 [inline] [] kzalloc include/linux/slab.h:682 [inline] [] nci_hci_allocate+0x21/0xd0 net/nfc/nci/hci.c:784 [] nci_allocate_device net/nfc/nci/core.c:1170 [inline] [] nci_allocate_device+0x10b/0x160 net/nfc/nci/core.c:1132 [] nfcmrvl_nci_register_dev+0x10a/0x1c0 drivers/nfc/nfcmrvl/main.c:153 [] nfcmrvl_probe+0x223/0x290 drivers/nfc/nfcmrvl/usb.c:345 [] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [] really_probe+0x159/0x4a0 drivers/base/dd.c:554 [] driver_probe_device+0x84/0x100 drivers/base/dd.c:740 [] __device_attach_driver+0xee/0x110 drivers/base/dd.c:846 [] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [] __device_attach+0x122/0x250 drivers/base/dd.c:914 [] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [] device_add+0x5be/0xc30 drivers/base/core.c:3109 [] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164 [] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [] really_probe+0x159/0x4a0 drivers/base/dd.c:554