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BUG: KMSAN: uninit-value in geneve_xmit_skb drivers/net/geneve.c:909 [inline]
BUG: KMSAN: uninit-value in geneve_xmit+0x300c/0x3200 drivers/net/geneve.c:1005
CPU: 1 PID: 9714 Comm: syz-executor.1 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 geneve_xmit_skb drivers/net/geneve.c:909 [inline]
 geneve_xmit+0x300c/0x3200 drivers/net/geneve.c:1005
 __netdev_start_xmit include/linux/netdevice.h:4611 [inline]
 netdev_start_xmit include/linux/netdevice.h:4625 [inline]
 xmit_one+0x3cf/0x750 net/core/dev.c:3556
 dev_hard_start_xmit net/core/dev.c:3572 [inline]
 __dev_queue_xmit+0x3aad/0x4470 net/core/dev.c:4131
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4164
 neigh_hh_output include/net/neighbour.h:498 [inline]
 neigh_output include/net/neighbour.h:507 [inline]
 ip6_finish_output2+0x23f1/0x2a70 net/ipv6/ip6_output.c:117
 __ip6_finish_output+0x9c0/0xa90 net/ipv6/ip6_output.c:143
 ip6_finish_output+0x14b/0x4b0 net/ipv6/ip6_output.c:153
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x68d/0x7f0 net/ipv6/ip6_output.c:176
 dst_output include/net/dst.h:443 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 mld_sendpack+0xf6c/0x1470 net/ipv6/mcast.c:1679
 mld_send_cr net/ipv6/mcast.c:1975 [inline]
 mld_ifc_timer_expire+0x13b8/0x1b50 net/ipv6/mcast.c:2474
 call_timer_fn+0x226/0x550 kernel/time/timer.c:1404
 expire_timers+0x4fc/0x780 kernel/time/timer.c:1449
 __run_timers+0xaf4/0xd30 kernel/time/timer.c:1773
 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786
 __do_softirq+0x2ea/0x7f5 kernel/softirq.c:293
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:23 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
 do_softirq_own_stack+0x7c/0xa0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:390 [inline]
 __irq_exit_rcu+0x226/0x270 kernel/softirq.c:420
 irq_exit_rcu+0xe/0x10 kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0x107/0x130 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:593
RIP: 0010:kmsan_internal_is_vmalloc_addr+0x26/0x30 mm/kmsan/kmsan.c:546
Code: 31 c0 5d c3 55 48 89 e5 48 89 f8 48 c1 e8 28 3d c8 ff ff 00 0f 97 c1 48 b8 ff ff ff ff ff d0 ff ff 48 39 c7 0f 92 c0 20 c8 5d <c3> 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 48 81 ff ff ff ff 9f 0f
RSP: 0018:ffff88801f8fb180 EFLAGS: 00000246
RAX: ffffd0ffffffff00 RBX: ffffffff920c7b20 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff920c7b20
RBP: ffff88801f8fb1a0 R08: ffffffff829b11a3 R09: ffff88812fffa000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888126e909d8 R14: 0000000000000000 R15: 0000000000000000
 kmsan_get_shadow_origin_ptr+0x6c/0xb0 mm/kmsan/kmsan_shadow.c:149
 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0xb65/0x1de0 fs/sysfs/group.c:149
 internal_create_groups fs/sysfs/group.c:189 [inline]
 sysfs_create_groups+0xee/0x2d0 fs/sysfs/group.c:215
 device_add_groups drivers/base/core.c:1783 [inline]
 device_add_attrs drivers/base/core.c:1942 [inline]
 device_add+0x13ee/0x40d0 drivers/base/core.c:2631
 netdev_register_kobject+0x32b/0x760 net/core/net-sysfs.c:1888
 register_netdevice+0x2a7c/0x37d0 net/core/dev.c:9514
 __ip_tunnel_create+0x522/0x760 net/ipv4/ip_tunnel.c:267
 ip_tunnel_init_net+0x327/0xdf0 net/ipv4/ip_tunnel.c:1072
 ipgre_init_net+0x7f/0x90 net/ipv4/ip_gre.c:1006
 ops_init+0x579/0x7d0 net/core/net_namespace.c:151
 setup_net+0x289/0x1330 net/core/net_namespace.c:341
 copy_net_ns+0x619/0xbe0 net/core/net_namespace.c:482
 create_new_namespaces+0xc42/0x13c0 kernel/nsproxy.c:110
 copy_namespaces+0x3ec/0x590 kernel/nsproxy.c:179
 copy_process+0x3fec/0x96c0 kernel/fork.c:2103
 _do_fork+0x2fa/0x11b0 kernel/fork.c:2445
 __do_sys_clone kernel/fork.c:2601 [inline]
 __se_sys_clone+0x3d9/0x420 kernel/fork.c:2582
 __x64_sys_clone+0x62/0x80 kernel/fork.c:2582
 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: Bad RIP value.
RSP: 002b:00007fc5eefb3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000001f40 RCX: 000000000045d5b9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000004412c500
RBP: 000000000118d0d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118d08c
R13: 000000000169fb6f R14: 00007fc5eefb49c0 R15: 000000000118d08c

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310
 __msan_chain_origin+0x50/0x90 mm/kmsan/kmsan_instr.c:165
 geneve_changelink+0xdb2/0x10f0 drivers/net/geneve.c:1652
 __rtnl_newlink net/core/rtnetlink.c:3255 [inline]
 rtnl_newlink+0x3384/0x3ed0 net/core/rtnetlink.c:3397
 rtnetlink_rcv_msg+0x142b/0x18c0 net/core/rtnetlink.c:5460
 netlink_rcv_skb+0x6d7/0x7e0 net/netlink/af_netlink.c:2469
 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5478
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x11c8/0x1490 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x173a/0x1840 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0xc82/0x1240 net/socket.c:2352
 ___sys_sendmsg net/socket.c:2406 [inline]
 __sys_sendmsg+0x6d1/0x840 net/socket.c:2439
 __do_sys_sendmsg net/socket.c:2448 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2446
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2446
 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Local variable ----df@geneve_changelink created at:
 geneve_changelink+0x101/0x10f0 drivers/net/geneve.c:1622
 geneve_changelink+0x101/0x10f0 drivers/net/geneve.c:1622
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