------------[ cut here ]------------
WARNING: CPU: 0 PID: 27701 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: 27701 Comm: syz-executor.3 Not tainted 5.8.0-rc2-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+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 exc_invalid_op+0x24d/0x400 arch/x86/kernel/traps.c:235
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563
RIP: 0010:nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:448
Code: e8 ae a5 6f fc 85 db 74 32 e8 25 a9 6f fc 48 89 ef e8 8d ad ae fc 5b 5d 41 5c 41 5d 41 5e 41 5f e9 0e a9 6f fc e8 09 a9 6f fc <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f e9 f8 a8 6f fc e8 f3 a8 6f fc
RSP: 0018:ffffc90004c37580 EFLAGS: 00010216
RAX: 0000000000008243 RBX: dffffc0000000000 RCX: ffffc9000fc2c000
RDX: 0000000000040000 RSI: ffffffff8503a747 RDI: ffff88808dccb380
RBP: ffff88808dccb3b8 R08: 0000000000000001 R09: ffff88805216aa08
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888093a97650
R13: ffff888057665c00 R14: ffff88808dccb3b8 R15: ffff88808dccb380
 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:399 [inline]
 fib6_del_route net/ipv6/ip6_fib.c:1981 [inline]
 fib6_del+0xf7d/0x1630 net/ipv6/ip6_fib.c:2017
 __ip6_del_rt_siblings net/ipv6/route.c:3843 [inline]
 ip6_route_del+0x1527/0x1a60 net/ipv6/route.c:3991
 ipv6_route_ioctl+0x468/0x570 net/ipv6/route.c:4362
 inet6_ioctl+0x242/0x280 net/ipv6/af_inet6.c:561
 sock_do_ioctl+0xcb/0x2d0 net/socket.c:1048
 sock_ioctl+0x3b8/0x730 net/socket.c:1199
 vfs_ioctl fs/ioctl.c:48 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:753
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl fs/ioctl.c:760 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cb19
Code: Bad RIP value.
RSP: 002b:00007fc5e64cfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004f4680 RCX: 000000000045cb19
RDX: 0000000020000240 RSI: 000000000000890c RDI: 0000000000000003
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000006c2 R14: 00000000004c9afa R15: 00007fc5e64d06d4
Kernel Offset: disabled