------------[ cut here ]------------
proc_dir_entry 'dev_snmp6/hsr1' already registered
WARNING: CPU: 0 PID: 7317 at fs/proc/generic.c:362 proc_register+0x40b/0x580 fs/proc/generic.c:362
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7317 Comm: syz-executor.0 Not tainted 5.7.0-rc4-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+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:175 [inline]
 fixup_bug arch/x86/kernel/traps.c:170 [inline]
 do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:proc_register+0x40b/0x580 fs/proc/generic.c:362
Code: ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 5c 01 00 00 48 8b 04 24 48 c7 c7 60 69 39 88 48 8b b0 d8 00 00 00 e8 fd a1 61 ff <0f> 0b 48 c7 c7 40 9f ac 89 e8 e7 9e ed 05 48 8b 4c 24 28 48 b8 00
RSP: 0018:ffffc900062c6cb8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8880a9086908 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815ce1a1 RDI: fffff52000c58d89
RBP: ffff888093a2f180 R08: ffff8880a8c1e1c0 R09: ffffed1015cc66a9
R10: ffff8880ae633547 R11: ffffed1015cc66a8 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888093a2f380 R15: 0000000000000004
 proc_create_single_data+0xdb/0x130 fs/proc/generic.c:631
 snmp6_register_dev+0xbe/0x140 net/ipv6/proc.c:254
 ipv6_add_dev net/ipv6/addrconf.c:408 [inline]
 ipv6_add_dev+0x54b/0x10b0 net/ipv6/addrconf.c:365
 addrconf_notify+0x960/0x2310 net/ipv6/addrconf.c:3503
 notifier_call_chain+0xc0/0x230 kernel/notifier.c:83
 call_netdevice_notifiers_info net/core/dev.c:1948 [inline]
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1933
 call_netdevice_notifiers_extack net/core/dev.c:1960 [inline]
 call_netdevice_notifiers net/core/dev.c:1974 [inline]
 register_netdevice+0xd70/0x10b0 net/core/dev.c:9423
 hsr_dev_finalize+0x516/0x746 net/hsr/hsr_device.c:486
 hsr_newlink+0x27c/0x520 net/hsr/hsr_netlink.c:83
 __rtnl_newlink+0xf18/0x1590 net/core/rtnetlink.c:3333
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3391
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5454
 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6bf/0x7e0 net/socket.c:2362
 ___sys_sendmsg+0x100/0x170 net/socket.c:2416
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x270/0xe90 arch/x86/entry/common.c:396
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
Kernel Offset: disabled
Rebooting in 86400 seconds..