------------[ cut here ]------------
WARNING: CPU: 1 PID: 30838 at drivers/net/netdevsim/fib.c:448 nsim_fib6_rt_nh_del+0x287/0x350 drivers/net/netdevsim/fib.c:448
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 30838 Comm: syz-executor.3 Not tainted 5.6.0-rc1-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+0x197/0x210 lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x3e kernel/panic.c:582
 report_bug+0x289/0x300 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+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:nsim_fib6_rt_nh_del+0x287/0x350 drivers/net/netdevsim/fib.c:448
Code: 85 db 74 2a e8 6a d5 6f fc 4c 89 e7 e8 c2 29 ae fc e8 5d d5 6f fc 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 49 d5 6f fc <0f> 0b eb e3 e8 40 d5 6f fc be 03 00 00 00 4c 89 f7 e8 23 ab 9c fe
RSP: 0018:ffffc90015a2eef8 EFLAGS: 00010212
RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc9000efcf000
RDX: 000000000000ae11 RSI: ffffffff8505b8b7 RDI: ffff888096790580
RBP: ffffc90015a2ef28 R08: ffff88805678c580 R09: ffff88805678ce10
R10: ffffc90015a2ef38 R11: ffffffff8aa5a1c7 R12: ffff8880967905b8
R13: ffff888090072e00 R14: ffff8880967905b8 R15: ffff88808f067e10
 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+0x1582/0x2670 drivers/net/netdevsim/fib.c:772
 notifier_call_chain+0xc2/0x230 kernel/notifier.c:83
 __atomic_notifier_call_chain+0xa6/0x1a0 kernel/notifier.c:173
 atomic_notifier_call_chain+0x2e/0x40 kernel/notifier.c:183
 call_fib_notifiers+0x173/0x2a0 net/core/fib_notifier.c:35
 call_fib6_notifiers+0x4b/0x60 net/ipv6/fib6_notifier.c:22
 call_fib6_entry_notifiers+0xfb/0x150 net/ipv6/ip6_fib.c:399
 fib6_del_route net/ipv6/ip6_fib.c:1980 [inline]
 fib6_del+0xec1/0x1550 net/ipv6/ip6_fib.c:2016
 fib6_clean_node+0x3c4/0x5b0 net/ipv6/ip6_fib.c:2178
 fib6_walk_continue+0x4a9/0x8e0 net/ipv6/ip6_fib.c:2100
 fib6_walk+0x9d/0x100 net/ipv6/ip6_fib.c:2148
 fib6_clean_tree+0xea/0x120 net/ipv6/ip6_fib.c:2228
 __fib6_clean_all+0x118/0x2a0 net/ipv6/ip6_fib.c:2244
 fib6_clean_all+0x2b/0x40 net/ipv6/ip6_fib.c:2255
 rt6_sync_down_dev+0x134/0x150 net/ipv6/route.c:4755
 rt6_disable_ip+0x27/0x460 net/ipv6/route.c:4760
 addrconf_ifdown+0x9b/0x12c0 net/ipv6/addrconf.c:3708
 addrconf_notify+0x5a6/0x2270 net/ipv6/addrconf.c:3633
 notifier_call_chain+0xc2/0x230 kernel/notifier.c:83
 __raw_notifier_call_chain kernel/notifier.c:361 [inline]
 raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:368
 call_netdevice_notifiers_info net/core/dev.c:1943 [inline]
 call_netdevice_notifiers_info+0xba/0x130 net/core/dev.c:1928
 call_netdevice_notifiers_mtu net/core/dev.c:1992 [inline]
 dev_set_mtu_ext+0x39f/0x5f0 net/core/dev.c:8295
 dev_set_mtu+0xa5/0x130 net/core/dev.c:8316
 dev_ifsioc+0x357/0xa00 net/core/dev_ioctl.c:245
 dev_ioctl+0x1b8/0xc70 net/core/dev_ioctl.c:490
 sock_do_ioctl+0x1b7/0x2f0 net/socket.c:1076
 compat_ifreq_ioctl net/socket.c:3299 [inline]
 compat_sock_ioctl_trans net/socket.c:3555 [inline]
 compat_sock_ioctl+0x857/0x2240 net/socket.c:3588
 __do_compat_sys_ioctl fs/ioctl.c:857 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:808 [inline]
 __ia32_compat_sys_ioctl+0x245/0x2c0 fs/ioctl.c:808
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x27b/0xe16 arch/x86/entry/common.c:408
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f9de39
Code: 1d 00 00 00 89 d3 5b 5e 5d c3 8b 04 24 c3 8b 1c 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5d980cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000008922
RDX: 0000000020000300 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..