------------[ cut here ]------------
WARNING: CPU: 0 PID: 9080 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: 0 PID: 9080 Comm: syz-executor.1 Not tainted 5.6.0-rc5-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:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [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:nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:448
Code: e8 0e bf 8b fc 85 db 74 32 e8 95 bd 8b fc 48 89 ef e8 ad 2e c8 fc 5b 5d 41 5c 41 5d 41 5e 41 5f e9 7e bd 8b fc e8 79 bd 8b fc <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f e9 68 bd 8b fc e8 63 bd 8b fc
RSP: 0018:ffffc90002e86478 EFLAGS: 00010246
RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc90004ea9000
RDX: 0000000000040000 RSI: ffffffff84e65817 RDI: ffff8880a793bd80
RBP: ffff8880a793bdb8 R08: ffff888033ae8040 R09: fffffbfff14cba41
R10: ffffc90002e864b0 R11: ffffffff8a65d207 R12: ffff888054d1ec10
R13: ffff88803c1dbe00 R14: ffff8880a793bdb8 R15: ffff8880a793bd80
 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+0x14bb/0x24e0 drivers/net/netdevsim/fib.c:772
 notifier_call_chain+0xc0/0x230 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+0xfb/0x150 net/ipv6/ip6_fib.c:399
 fib6_del_route net/ipv6/ip6_fib.c:1981 [inline]
 fib6_del+0xe6c/0x14d0 net/ipv6/ip6_fib.c:2017
 fib6_clean_node+0x39b/0x570 net/ipv6/ip6_fib.c:2179
 fib6_walk_continue+0x4aa/0x8e0 net/ipv6/ip6_fib.c:2101
 fib6_walk+0x91/0xf0 net/ipv6/ip6_fib.c:2149
 fib6_clean_tree+0xdb/0x120 net/ipv6/ip6_fib.c:2229
 __fib6_clean_all+0x118/0x2a0 net/ipv6/ip6_fib.c:2245
 rt6_sync_down_dev+0x12a/0x150 net/ipv6/route.c:4755
 rt6_disable_ip+0x24/0x460 net/ipv6/route.c:4760
 addrconf_ifdown+0x9d/0x12f0 net/ipv6/addrconf.c:3708
 addrconf_notify+0x5a6/0x2270 net/ipv6/addrconf.c:3633
 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]
 __dev_notify_flags+0x1e9/0x2c0 net/core/dev.c:8183
 dev_change_flags+0x100/0x160 net/core/dev.c:8219
 do_setlink+0xa1c/0x35e0 net/core/rtnetlink.c:2596
 rtnl_group_changelink net/core/rtnetlink.c:3103 [inline]
 __rtnl_newlink+0xc96/0x1590 net/core/rtnetlink.c:3257
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3377
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5436
 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2478
 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+0x6b9/0x7d0 net/socket.c:2343
 ___sys_sendmsg+0x100/0x170 net/socket.c:2397
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2430
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x270/0xe8f arch/x86/entry/common.c:408
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
Kernel Offset: disabled
Rebooting in 86400 seconds..