CVE-2022-48691

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netfilter: nf_tables: clean up hook list when offload flags check fails<br /> <br /> splice back the hook list so nft_chain_release_hook() has a chance to<br /> release the hooks.<br /> <br /> BUG: memory leak<br /> unreferenced object 0xffff88810180b100 (size 96):<br /> comm "syz-executor133", pid 3619, jiffies 4294945714 (age 12.690s)<br /> hex dump (first 32 bytes):<br /> 28 64 23 02 81 88 ff ff 28 64 23 02 81 88 ff ff (d#.....(d#.....<br /> 90 a8 aa 83 ff ff ff ff 00 00 b5 0f 81 88 ff ff ................<br /> backtrace:<br /> [] kmalloc include/linux/slab.h:600 [inline]<br /> [] nft_netdev_hook_alloc+0x3b/0xc0 net/netfilter/nf_tables_api.c:1901<br /> [] nft_chain_parse_netdev net/netfilter/nf_tables_api.c:1998 [inline]<br /> [] nft_chain_parse_hook+0x33a/0x530 net/netfilter/nf_tables_api.c:2073<br /> [] nf_tables_addchain.constprop.0+0x10b/0x950 net/netfilter/nf_tables_api.c:2218<br /> [] nf_tables_newchain+0xa8b/0xc60 net/netfilter/nf_tables_api.c:2593<br /> [] nfnetlink_rcv_batch+0xa46/0xd20 net/netfilter/nfnetlink.c:517<br /> [] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:638 [inline]<br /> [] nfnetlink_rcv+0x1f9/0x220 net/netfilter/nfnetlink.c:656<br /> [] netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]<br /> [] netlink_unicast+0x397/0x4c0 net/netlink/af_netlink.c:1345<br /> [] netlink_sendmsg+0x396/0x710 net/netlink/af_netlink.c:1921<br /> [] sock_sendmsg_nosec net/socket.c:714 [inline]<br /> [] sock_sendmsg+0x56/0x80 net/socket.c:734<br /> [] ____sys_sendmsg+0x36c/0x390 net/socket.c:2482<br /> [] ___sys_sendmsg+0xa8/0x110 net/socket.c:2536<br /> [] __sys_sendmsg+0x88/0x100 net/socket.c:2565<br /> [] do_syscall_x64 arch/x86/entry/common.c:50 [inline]<br /> [] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80<br /> [] entry_SYSCALL_64_after_hwframe+0x63/0xcd