------------[ cut here ]------------
WARNING: CPU: 1 PID: 1903 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: 1903 Comm: syz-executor.2 Not tainted 5.6.0-rc3-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 3a 1a 6f fc 4c 89 e7 e8 e2 6f ad fc e8 2d 1a 6f fc 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 19 1a 6f fc <0f> 0b eb e3 e8 10 1a 6f fc be 03 00 00 00 4c 89 f7 e8 03 57 9c fe
RSP: 0018:ffffc90001c7f5a8 EFLAGS: 00010212
RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc9000ddad000
RDX: 00000000000088a5 RSI: ffffffff85066d37 RDI: ffff88808a06cd00
RBP: ffffc90001c7f5d8 R08: ffff888045812400 R09: ffff888045812c90
R10: ffffc90001c7f5e8 R11: ffffffff8aa5b3c7 R12: ffff88808a06cd38
R13: ffff888094840000 R14: ffff88808a06cd38 R15: ffff8880a23efbd0
 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:1981 [inline]
 fib6_del+0xec1/0x1550 net/ipv6/ip6_fib.c:2017
 __ip6_del_rt_siblings net/ipv6/route.c:3811 [inline]
 ip6_route_del+0x1089/0x14f0 net/ipv6/route.c:3959
 ipv6_route_ioctl+0x326/0x360 net/ipv6/route.c:4336
 inet6_ioctl+0x17c/0x1c0 net/ipv6/af_inet6.c:549
 sock_do_ioctl+0xd8/0x2f0 net/socket.c:1053
 sock_ioctl+0x3ed/0x790 net/socket.c:1204
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x123/0x180 fs/ioctl.c:763
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:770
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c449
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6808ff7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6808ff86d4 RCX: 000000000045c449
RDX: 00000000200000c0 RSI: 000000000000890c RDI: 0000000000000008
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000067c R14: 00000000004c9108 R15: 000000000076bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..