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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: 0 PID: 13093 Comm: kworker/u4:17 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
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_resolve_output+0xbb0/0xc90 net/core/neighbour.c:1489
 neigh_output include/net/neighbour.h:509 [inline]
 ip6_finish_output2+0x249c/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:batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:404 [inline]
RIP: 0010:batadv_nc_worker+0x2cd/0x1d70 net/batman-adv/network-coding.c:718
Code: e8 08 23 82 f1 4d 85 f6 75 dc 0f 1f 00 e8 1b 3a 06 f1 48 83 7d b0 00 4c 8b 65 a0 48 8b 7d c8 4c 8b 75 b8 75 1e 49 ff c6 8b 1f <e8> 7e 1d 82 f1 83 38 00 75 20 49 39 de 73 27 e8 ef 39 06 f1 e9 1a
RSP: 0018:ffff88801a7c3b60 EFLAGS: 00000206
RAX: ffffffff90b481a5 RBX: 0000000000000400 RCX: ffff88801a7b9e80
RDX: 0000000000000000 RSI: 0000000000000100 RDI: ffff888052b94bf0
RBP: ffff88801a7c3c80 R08: ffffea0000000001 R09: ffff88812fffa000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88801a7ba858 R14: 000000000000004b R15: 00000000047c00fe
 process_one_work+0x1688/0x2140 kernel/workqueue.c:2269
 worker_thread+0x10bc/0x2730 kernel/workqueue.c:2415
 kthread+0x551/0x590 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

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
 __compat_sys_sendmsg net/compat.c:466 [inline]
 __do_compat_sys_sendmsg net/compat.c:473 [inline]
 __se_compat_sys_sendmsg+0xa7/0xc0 net/compat.c:470
 __ia32_compat_sys_sendmsg+0x4a/0x70 net/compat.c:470
 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline]
 __do_fast_syscall_32+0x2af/0x480 arch/x86/entry/common.c:477
 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505
 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

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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