In the Linux kernel, the following vulnerability has been resolved:[EOL][EOL]netlink: annotate accesses to nlk->cb_running[EOL][EOL]Both netlink_recvmsg() and netlink_native_seq_show() read[EOL]nlk->cb_running locklessly. Use READ_ONCE() there.[EOL][EOL]Add corresponding WRITE_ONCE() to netlink_dump() and[EOL]__netlink_dump_start()[EOL][EOL]syzbot reported:[EOL]BUG: KCSAN: data-race in __netlink_dump_start / netlink_recvmsg[EOL][EOL]write to 0xffff88813ea4db59 of 1 bytes by task 28219 on cpu 0:[EOL]__netlink_dump_start+0x3af/0x4d0 net/netlink/af_netlink.c:2399[EOL]netlink_dump_start include/linux/netlink.h:308 [inline][EOL]rtnetlink_rcv_msg+0x70f/0x8c0 net/core/rtnetlink.c:6130[EOL]netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2577[EOL]rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6192[EOL]netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline][EOL]netlink_unicast+0x56f/0x640 net/netlink/af_netlink.c:1365[EOL]netlink_sendmsg+0x665/0x770 net/netlink/af_netlink.c:1942[EOL]sock_sendmsg_nosec net/socket.c:724 [inline][EOL]sock_sendmsg net/socket.c:747 [inline][EOL]sock_write_iter+0x1aa/0x230 net/socket.c:1138[EOL]call_write_iter include/linux/fs.h:1851 [inline][EOL]new_sync_write fs/read_write.c:491 [inline][EOL]vfs_write+0x463/0x760 fs/read_write.c:584[EOL]ksys_write+0xeb/0x1a0 fs/read_write.c:637[EOL]__do_sys_write fs/read_write.c:649 [inline][EOL]__se_sys_write fs/read_write.c:646 [inline][EOL]__x64_sys_write+0x42/0x50 fs/read_write.c:646[EOL]do_syscall_x64 arch/x86/entry/common.c:50 [inline][EOL]do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80[EOL]entry_SYSCALL_64_after_hwframe+0x63/0xcd[EOL][EOL]read to 0xffff88813ea4db59 of 1 bytes by task 28222 on cpu 1:[EOL]netlink_recvmsg+0x3b4/0x730 net/netlink/af_netlink.c:2022[EOL]sock_recvmsg_nosec+0x4c/0x80 net/socket.c:1017[EOL]____sys_recvmsg+0x2db/0x310 net/socket.c:2718[EOL]___sys_recvmsg net/socket.c:2762 [inline][EOL]do_recvmmsg+0x2e5/0x710 net/socket.c:2856[EOL]__sys_recvmmsg net/socket.c:2935 [inline][EOL]__do_sys_recvmmsg net/socket.c:2958 [inline][EOL]__se_sys_recvmmsg net/socket.c:2951 [inline][EOL]__x64_sys_recvmmsg+0xe2/0x160 net/socket.c:2951[EOL]do_syscall_x64 arch/x86/entry/common.c:50 [inline][EOL]do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80[EOL]entry_SYSCALL_64_after_hwframe+0x63/0xcd[EOL][EOL]value changed: 0x00 -> 0x01
