syzbot

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Invalid notifier called!
WARNING: CPU: 1 PID: 20307 at kernel/notifier.c:78 notifier_call_chain+0x188/0x200 kernel/notifier.c:78
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 20307 Comm: syz-executor.2 Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x198/0x1fd lib/dump_stack.c:118
 panic+0x382/0x7fb kernel/panic.c:231
 __warn.cold+0x20/0x4b kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:notifier_call_chain+0x188/0x200 kernel/notifier.c:78
Code: 31 ff 89 c6 89 44 24 04 e8 a5 a8 26 00 8b 44 24 04 85 c0 0f 85 18 ff ff ff e8 34 ac 26 00 48 c7 c7 20 34 8b 88 e8 aa e9 f6 ff <0f> 0b e8 21 ac 26 00 4d 85 ed 74 10 e8 17 ac 26 00 89 de 31 ff e8
RSP: 0018:ffffc9000889eb00 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 00000000ffffffdb RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815f59d5 RDI: fffff52001113d52
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8d0c29ff
R10: 000000000000160d R11: 0000000000000001 R12: 0000000000000000
R13: ffff888011d82dc8 R14: 0000000000000000 R15: ffff888000102dc8
 __atomic_notifier_call_chain+0x95/0x180 kernel/notifier.c:173
 addrconf_ifdown.isra.0+0xa56/0x1590 net/ipv6/addrconf.c:3817
 addrconf_notify+0x55c/0x2310 net/ipv6/addrconf.c:3627
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2033
 call_netdevice_notifiers_extack net/core/dev.c:2045 [inline]
 call_netdevice_notifiers net/core/dev.c:2059 [inline]
 __dev_notify_flags+0x1da/0x2b0 net/core/dev.c:8325
 dev_change_flags+0x100/0x160 net/core/dev.c:8361
 do_setlink+0x88b/0x3a70 net/core/rtnetlink.c:2706
 __rtnl_newlink+0xc1c/0x1740 net/core/rtnetlink.c:3374
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3500
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5563
 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2470
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:671
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45de89
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8de8a4ec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000002e400 RCX: 000000000045de89
RDX: 0001000000000000 RSI: 0000000020000000 RDI: 0000000000000007
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 000000000169fb6f R14: 00007f8de8a4f9c0 R15: 000000000118bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..