CVE-2021-47180

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