------------[ cut here ]------------
WARNING: CPU: 1 PID: 9724 at drivers/net/netdevsim/fib.c:466 nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:466
Modules linked in:
CPU: 1 PID: 9724 Comm: syz-executor.5 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:466
Code: e8 3e 5e 4c fc 85 db 74 32 e8 b5 56 4c fc 48 89 ef e8 dd 88 8e fc 5b 5d 41 5c 41 5d 41 5e 41 5f e9 9e 56 4c fc e8 99 56 4c fc <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f e9 88 56 4c fc e8 83 56 4c fc
RSP: 0018:ffffc90002d4f618 EFLAGS: 00010216
RAX: 00000000000083ee RBX: dffffc0000000000 RCX: ffffc90013765000
RDX: 0000000000040000 RSI: ffffffff85267327 RDI: ffff88801c703280
RBP: ffff88801c7032b8 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff8526d7a0 R11: 0000000000000000 R12: ffff88814140ba90
R13: ffff888023709200 R14: ffff88801c7032b8 R15: ffff88801c703280
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0063) knlGS:00000000f5546b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000810c678 CR3: 0000000013c27000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 nsim_fib6_rt_remove drivers/net/netdevsim/fib.c:706 [inline]
 nsim_fib6_event drivers/net/netdevsim/fib.c:738 [inline]
 nsim_fib_event drivers/net/netdevsim/fib.c:757 [inline]
 nsim_fib_event_nb+0x10e3/0x2840 drivers/net/netdevsim/fib.c:785
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 atomic_notifier_call_chain+0x8d/0x170 kernel/notifier.c:217
 call_fib_notifiers+0x166/0x290 net/core/fib_notifier.c:35
 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:400 [inline]
 fib6_del_route net/ipv6/ip6_fib.c:1985 [inline]
 fib6_del+0xefc/0x15a0 net/ipv6/ip6_fib.c:2026
 __ip6_del_rt_siblings net/ipv6/route.c:3848 [inline]
 ip6_route_del+0x172a/0x1cc0 net/ipv6/route.c:3996
 ipv6_route_ioctl+0x468/0x570 net/ipv6/route.c:4367
 inet6_compat_routing_ioctl net/ipv6/af_inet6.c:610 [inline]
 inet6_compat_ioctl+0x296/0x310 net/ipv6/af_inet6.c:621
 compat_sock_ioctl+0x159/0x1d30 net/socket.c:3491
 __do_compat_sys_ioctl+0x1d3/0x230 fs/ioctl.c:842
 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline]
 __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f4c549
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 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:00000000f55460cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000000890c
RDX: 0000000020000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000