------------[ cut here ]------------
WARNING: CPU: 0 PID: 19715 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: 19715 Comm: syz-executor.5 Not tainted 5.7.0-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:105 [inline]
 fixup_bug arch/x86/kernel/traps.c:100 [inline]
 do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:197
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:216
 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 ee 69 73 fc 85 db 74 32 e8 45 68 73 fc 48 89 ef e8 7d 31 b2 fc 5b 5d 41 5c 41 5d 41 5e 41 5f e9 2e 68 73 fc e8 29 68 73 fc <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f e9 18 68 73 fc e8 13 68 73 fc
RSP: 0018:ffffc900161475a8 EFLAGS: 00010216
RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc90013d04000
RDX: 00000000000093d2 RSI: ffffffff85006697 RDI: ffff8880959b6180
RBP: ffff8880959b61b8 R08: ffff8880506c6380 R09: fffffbfff1516d79
R10: ffffc900161475e0 R11: fffffbfff1516d78 R12: ffff8880a8542cd0
R13: ffff888094d7a400 R14: ffff8880959b61b8 R15: ffff8880959b6180
 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+0xe63/0x14c0 net/ipv6/ip6_fib.c:2017
 __ip6_del_rt_siblings net/ipv6/route.c:3843 [inline]
 ip6_route_del+0xf98/0x13b0 net/ipv6/route.c:3991
 ipv6_route_ioctl+0x462/0x560 net/ipv6/route.c:4362
 inet6_ioctl+0x24e/0x2a0 net/ipv6/af_inet6.c:561
 sock_do_ioctl+0xd8/0x2f0 net/socket.c:1048
 sock_ioctl+0x3ec/0x790 net/socket.c:1199
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:771
 __do_sys_ioctl fs/ioctl.c:780 [inline]
 __se_sys_ioctl fs/ioctl.c:778 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca69
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:00007fd9c2b4ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004f3e60 RCX: 000000000045ca69
RDX: 0000000020000240 RSI: 000000000000890c RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000006b8 R14: 00000000004c998f R15: 00007fd9c2b4b6d4
Kernel Offset: disabled
Rebooting in 86400 seconds..