------------[ cut here ]------------
WARNING: CPU: 1 PID: 9195 at drivers/net/netdevsim/fib.c:448 nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:448
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 9195 Comm: syz-executor.2 Not tainted 5.9.0-rc7-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:nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:448
Code: e8 de 1a 41 fc 85 db 74 32 e8 75 1e 41 fc 48 89 ef e8 ed 7b 81 fc 5b 5d 41 5c 41 5d 41 5e 41 5f e9 5e 1e 41 fc e8 59 1e 41 fc <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f e9 48 1e 41 fc e8 43 1e 41 fc
RSP: 0018:ffffc900095dedf0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff853571ad
RDX: ffff8880a19e8500 RSI: ffffffff85352037 RDI: ffff8880a7b6f980
RBP: ffff8880a7b6f9b8 R08: 0000000000000001 R09: ffff8880a19e8de0
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88808de3a610
R13: ffff8880999f5a00 R14: ffff8880a7b6f9b8 R15: ffff8880a7b6f980
 nsim_fib6_rt_remove drivers/net/netdevsim/fib.c:688 [inline]
 nsim_fib6_event drivers/net/netdevsim/fib.c:725 [inline]
 nsim_fib_event drivers/net/netdevsim/fib.c:744 [inline]
 nsim_fib_event_nb+0x1230/0x2880 drivers/net/netdevsim/fib.c:772
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 __atomic_notifier_call_chain+0x95/0x180 kernel/notifier.c:173
 call_fib_notifiers+0x166/0x290 net/core/fib_notifier.c:35
 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:400 [inline]
 fib6_del_route net/ipv6/ip6_fib.c:1982 [inline]
 fib6_del+0xf04/0x15b0 net/ipv6/ip6_fib.c:2023
 fib6_clean_node+0x39b/0x570 net/ipv6/ip6_fib.c:2185
 fib6_walk_continue+0x4aa/0x8e0 net/ipv6/ip6_fib.c:2107
 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2155
 fib6_clean_tree+0xdb/0x120 net/ipv6/ip6_fib.c:2235
 __fib6_clean_all+0x120/0x290 net/ipv6/ip6_fib.c:2251
 rt6_sync_down_dev net/ipv6/route.c:4779 [inline]
 rt6_disable_ip+0x77f/0x890 net/ipv6/route.c:4784
 addrconf_ifdown.isra.0+0xf6/0x1590 net/ipv6/addrconf.c:3702
 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_close_many+0x30b/0x650 net/core/dev.c:1634
 rollback_registered_many+0x3a8/0x1250 net/core/dev.c:9261
 rollback_registered net/core/dev.c:9329 [inline]
 unregister_netdevice_queue+0x2dd/0x570 net/core/dev.c:10410
 unregister_netdevice include/linux/netdevice.h:2776 [inline]
 __tun_detach+0x1045/0x13c0 drivers/net/tun.c:691
 tun_detach drivers/net/tun.c:708 [inline]
 tun_chr_close+0xd9/0x180 drivers/net/tun.c:3408
 __fput+0x285/0x920 fs/file_table.c:281
 task_work_run+0xdd/0x190 kernel/task_work.c:141
 exit_task_work include/linux/task_work.h:25 [inline]
 do_exit+0xb7d/0x29f0 kernel/exit.c:806
 do_group_exit+0x125/0x310 kernel/exit.c:903
 get_signal+0x428/0x1f00 kernel/signal.c:2757
 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:161 [inline]
 exit_to_user_mode_prepare+0x1ae/0x200 kernel/entry/common.c:192
 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:267
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45dd99
Code: Bad RIP value.
RSP: 002b:00007fdc11e33cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000118bf28 RCX: 000000000045dd99
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118bf28
RBP: 000000000118bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 000000000169fb6f R14: 00007fdc11e349c0 R15: 000000000118bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..