BUG: unable to handle kernel paging request at ffffde202ae0cf33 #PF error: [normal kernel read fault] PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 31469 Comm: syz-executor.3 Not tainted 5.1.0-rc7+ #194 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:iptunnel_xmit_stats include/net/ip_tunnels.h:444 [inline] RIP: 0010:iptunnel_xmit+0x6ed/0x980 net/ipv4/ip_tunnel_core.c:94 Code: c1 e9 03 80 3c 11 00 0f 85 72 02 00 00 48 03 1c c5 60 a0 6b 88 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 02 00 00 48 8d 7b 10 4d 63 e4 48 b8 00 00 00 RSP: 0018:ffff8880ae8078d8 EFLAGS: 00010a06 RAX: dffffc0000000000 RBX: ffff110157067980 RCX: 1ffffffff10d740c RDX: 1fffe2202ae0cf33 RSI: ffffffff83317f8c RDI: ffff110157067998 RBP: ffff8880ae807938 R08: ffff88809944e5c0 R09: ffffed1015d05bc8 R10: ffffed1015d05bc7 R11: ffff8880ae82de3b R12: 00000000000000fc R13: ffff88802a11c8c0 R14: ffff888090146994 R15: ffff8880919ba440 FS: 0000000001968940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffde202ae0cf33 CR3: 0000000098a7e000 CR4: 00000000001406f0 Call Trace: udp_tunnel_xmit_skb+0x236/0x310 net/ipv4/udp_tunnel.c:191 tipc_udp_xmit.isra.0+0x805/0xcc0 net/tipc/udp_media.c:181 tipc_udp_send_msg+0x295/0x4a0 net/tipc/udp_media.c:247 tipc_bearer_xmit_skb+0x172/0x360 net/tipc/bearer.c:503 tipc_disc_timeout+0x933/0xd60 net/tipc/discover.c:332 call_timer_fn+0x190/0x720 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers kernel/time/timer.c:1681 [inline] __run_timers kernel/time/timer.c:1649 [inline] run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1694 __do_softirq+0x266/0x95a kernel/softirq.c:293 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1027 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:338 do_softirq kernel/softirq.c:330 [inline] __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:190 local_bh_enable include/linux/bottom_half.h:32 [inline] get_next_corpse net/netfilter/nf_conntrack_core.c:2018 [inline] nf_ct_iterate_cleanup+0x217/0x4e0 net/netfilter/nf_conntrack_core.c:2041 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2126 [inline] nf_ct_iterate_cleanup_net+0x133/0x190 net/netfilter/nf_conntrack_core.c:2111 masq_device_event+0xb5/0xe0 net/netfilter/nf_nat_masquerade.c:90 notifier_call_chain+0xc7/0x240 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1753 call_netdevice_notifiers_extack net/core/dev.c:1765 [inline] call_netdevice_notifiers net/core/dev.c:1779 [inline] dev_close_many+0x33f/0x6f0 net/core/dev.c:1522 rollback_registered_many+0x43b/0xfd0 net/core/dev.c:8177 rollback_registered+0x109/0x1d0 net/core/dev.c:8242 unregister_netdevice_queue net/core/dev.c:9289 [inline] unregister_netdevice_queue+0x1ee/0x2c0 net/core/dev.c:9282 unregister_netdevice include/linux/netdevice.h:2658 [inline] __tun_detach+0xd5b/0x1000 drivers/net/tun.c:727 tun_detach drivers/net/tun.c:744 [inline] tun_chr_close+0xe0/0x180 drivers/net/tun.c:3443 __fput+0x2e5/0x8d0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x90a/0x2fa0 kernel/exit.c:876 do_group_exit+0x135/0x370 kernel/exit.c:980 __do_sys_exit_group kernel/exit.c:991 [inline] __se_sys_exit_group kernel/exit.c:989 [inline] __x64_sys_exit_group+0x44/0x50 kernel/exit.c:989 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: Bad RIP value. RSP: 002b:00007ffc19c4a6c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001c RCX: 0000000000458da9 RDX: 0000000000412a80 RSI: 0000000000a54ef0 RDI: 0000000000000043 RBP: 00000000004be552 R08: 000000000000000c R09: 0000000000309ad4 R10: 0000000001968940 R11: 0000000000000246 R12: 00000000ffffffff R13: 00007ffc19c4a810 R14: 0000000000309ab9 R15: 00007ffc19c4a820 Modules linked in: CR2: ffffde202ae0cf33 ---[ end trace ba9f94efb7b4e175 ]--- RIP: 0010:iptunnel_xmit_stats include/net/ip_tunnels.h:444 [inline] RIP: 0010:iptunnel_xmit+0x6ed/0x980 net/ipv4/ip_tunnel_core.c:94 Code: c1 e9 03 80 3c 11 00 0f 85 72 02 00 00 48 03 1c c5 60 a0 6b 88 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 02 00 00 48 8d 7b 10 4d 63 e4 48 b8 00 00 00 RSP: 0018:ffff8880ae8078d8 EFLAGS: 00010a06 RAX: dffffc0000000000 RBX: ffff110157067980 RCX: 1ffffffff10d740c RDX: 1fffe2202ae0cf33 RSI: ffffffff83317f8c RDI: ffff110157067998 RBP: ffff8880ae807938 R08: ffff88809944e5c0 R09: ffffed1015d05bc8 R10: ffffed1015d05bc7 R11: ffff8880ae82de3b R12: 00000000000000fc R13: ffff88802a11c8c0 R14: ffff888090146994 R15: ffff8880919ba440 FS: 0000000001968940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000458d7f CR3: 0000000098a7e000 CR4: 00000000001406f0