===================================================== BUG: KMSAN: uninit-value in check_pointer lib/vsprintf.c:705 [inline] BUG: KMSAN: uninit-value in string+0x3cf/0x6f0 lib/vsprintf.c:717 check_pointer lib/vsprintf.c:705 [inline] string+0x3cf/0x6f0 lib/vsprintf.c:717 vsnprintf+0x2222/0x3650 lib/vsprintf.c:2805 vprintk_store+0x537/0x2150 kernel/printk/printk.c:2135 vprintk_emit+0x25c/0x950 kernel/printk/printk.c:2229 dev_vprintk_emit+0x5ef/0x6d0 drivers/base/core.c:4594 dev_printk_emit+0x1dd/0x21f drivers/base/core.c:4605 __netdev_printk+0x7e9/0xae0 net/core/dev.c:11447 netdev_info+0x1ea/0x22f net/core/dev.c:11502 nsim_udp_tunnel_unset_port+0x582/0x620 drivers/net/netdevsim/udp_tunnels.c:64 udp_tunnel_nic_device_sync_by_port net/ipv4/udp_tunnel_nic.c:246 [inline] __udp_tunnel_nic_device_sync+0x1060/0x1e40 net/ipv4/udp_tunnel_nic.c:289 udp_tunnel_nic_device_sync net/ipv4/udp_tunnel_nic.c:312 [inline] __udp_tunnel_nic_del_port+0x630/0x7b0 net/ipv4/udp_tunnel_nic.c:548 udp_tunnel_nic_del_port include/net/udp_tunnel.h:341 [inline] udp_tunnel_notify_del_rx_port+0x2d1/0x440 net/ipv4/udp_tunnel_core.c:146 __vxlan_sock_release_prep+0x444/0x510 drivers/net/vxlan.c:1583 vxlan_sock_release+0x560/0x700 drivers/net/vxlan.c:1606 vxlan_stop+0x1654/0x1750 drivers/net/vxlan.c:3146 __dev_close_many+0x640/0x850 net/core/dev.c:1574 dev_close_many+0x43f/0xb20 net/core/dev.c:1599 unregister_netdevice_many+0x8cd/0x3160 net/core/dev.c:11057 __rtnl_newlink net/core/rtnetlink.c:3489 [inline] rtnl_newlink+0x408e/0x43a0 net/core/rtnetlink.c:3506 rtnetlink_rcv_msg+0x148d/0x18d0 net/core/rtnetlink.c:5571 netlink_rcv_skb+0x40c/0x7e0 net/netlink/af_netlink.c:2496 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5589 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x1075/0x1340 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x14cf/0x1710 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0xe11/0x12c0 net/socket.c:2409 ___sys_sendmsg net/socket.c:2463 [inline] __sys_sendmmsg+0xac2/0xf60 net/socket.c:2549 __do_sys_sendmmsg net/socket.c:2578 [inline] __se_sys_sendmmsg net/socket.c:2575 [inline] __x64_sys_sendmmsg+0x11c/0x170 net/socket.c:2575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae Local variable sample.i created at: perf_log_itrace_start kernel/events/core.c:9069 [inline] event_sched_in+0x132b/0x35c0 kernel/events/core.c:2557 group_sched_in kernel/events/core.c:2595 [inline] merge_sched_in kernel/events/core.c:3746 [inline] visit_groups_merge+0x2919/0x7460 kernel/events/core.c:3696 CPU: 1 PID: 1541 Comm: syz-executor.3 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================