------------[ cut here ]------------
WARNING: CPU: 0 PID: 32013 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: 32013 Comm: syz-executor.3 Not tainted 5.7.0-rc1-next-20200415-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:nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:448
Code: e8 3e dd 78 fc 85 db 74 32 e8 95 db 78 fc 48 89 ef e8 3d af b6 fc 5b 5d 41 5c 41 5d 41 5e 41 5f e9 7e db 78 fc e8 79 db 78 fc <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f e9 68 db 78 fc e8 63 db 78 fc
RSP: 0018:ffffc90016aa7648 EFLAGS: 00010216
RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc9000efdf000
RDX: 000000000000845d RSI: ffffffff84fa5917 RDI: ffff888098bdf500
RBP: ffff888098bdf538 R08: ffff88808b2902c0 R09: fffffbfff15169c1
R10: ffffc90016aa7680 R11: fffffbfff15169c0 R12: ffff8880999b0090
R13: ffff88809260a200 R14: ffff888098bdf538 R15: ffff888098bdf500
 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+0xe69/0x14f0 net/ipv6/ip6_fib.c:2017
 __ip6_del_rt_siblings net/ipv6/route.c:3805 [inline]
 ip6_route_del+0xf98/0x13b0 net/ipv6/route.c:3953
 ipv6_route_ioctl+0x326/0x360 net/ipv6/route.c:4330
 inet6_ioctl+0x16c/0x1b0 net/ipv6/af_inet6.c:550
 sock_do_ioctl+0xd8/0x2f0 net/socket.c:1053
 sock_ioctl+0x3ec/0x790 net/socket.c:1204
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:763
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:770
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c829
Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb2bf05dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004f39a0 RCX: 000000000045c829
RDX: 0000000020000240 RSI: 000000000000890c RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000006b7 R14: 00000000004c9729 R15: 00007fb2bf05e6d4
Kernel Offset: disabled
Rebooting in 86400 seconds..