CVE-2022-50854

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> nfc: virtual_ncidev: Fix memory leak in virtual_nci_send()<br /> <br /> skb should be free in virtual_nci_send(), otherwise kmemleak will report<br /> memleak.<br /> <br /> Steps for reproduction (simulated in qemu):<br /> cd tools/testing/selftests/nci<br /> make<br /> ./nci_dev<br /> <br /> BUG: memory leak<br /> unreferenced object 0xffff888107588000 (size 208):<br /> comm "nci_dev", pid 206, jiffies 4294945376 (age 368.248s)<br /> hex dump (first 32 bytes):<br /> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................<br /> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................<br /> backtrace:<br /> [] __alloc_skb+0x1da/0x290<br /> [] nci_send_cmd+0xa3/0x350<br /> [] nci_reset_req+0x6b/0xa0<br /> [] __nci_request+0x90/0x250<br /> [] nci_dev_up+0x217/0x5b0<br /> [] nfc_dev_up+0x114/0x220<br /> [] nfc_genl_dev_up+0x94/0xe0<br /> [] genl_family_rcv_msg_doit.isra.14+0x228/0x2d0<br /> [] genl_rcv_msg+0x35c/0x640<br /> [] netlink_rcv_skb+0x11e/0x350<br /> [] genl_rcv+0x24/0x40<br /> [] netlink_unicast+0x43f/0x640<br /> [] netlink_sendmsg+0x73a/0xbf0<br /> [] __sys_sendto+0x324/0x370<br /> [] __x64_sys_sendto+0xdd/0x1b0<br /> [] do_syscall_64+0x3f/0x90