------------[ cut here ]------------ WARNING: CPU: 0 PID: 12280 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: 0 PID: 12280 Comm: syz-executor.5 Not tainted 5.5.0-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+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:176 [inline] fixup_bug arch/x86/kernel/traps.c:171 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:269 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:288 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 ca 00 77 fc 4c 89 e7 e8 52 3a b5 fc e8 bd 00 77 fc 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a9 00 77 fc <0f> 0b eb e3 e8 a0 00 77 fc be 03 00 00 00 4c 89 f7 e8 33 11 9f fe RSP: 0018:ffffc90005557418 EFLAGS: 00010216 RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc90013a98000 RDX: 000000000000846a RSI: ffffffff84fe6cf7 RDI: ffff888091d97180 RBP: ffffc90005557448 R08: ffff8880934ec580 R09: ffff8880934ece10 R10: ffffc90005557458 R11: ffffffff8a82e707 R12: ffff888091d971b8 R13: ffff8880a936d400 R14: ffff888091d971b8 R15: ffff88809caa4b50 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:1980 [inline] fib6_del+0xec1/0x1550 net/ipv6/ip6_fib.c:2016 __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] file_ioctl fs/ioctl.c:545 [inline] do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732 ksys_ioctl+0xab/0xd0 fs/ioctl.c:749 __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b349 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:00007fc063ff1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc063ff26d4 RCX: 000000000045b349 RDX: 0000000020000000 RSI: 000000000000890c RDI: 0000000000000007 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000006d3 R14: 00000000004c84b6 R15: 000000000075bfd4 Kernel Offset: disabled Rebooting in 86400 seconds..