------------[ cut here ]------------ WARNING: CPU: 1 PID: 29877 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: 29877 Comm: syz-executor.0 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 2e f9 4b fc 85 db 74 32 e8 a5 f1 4b fc 48 89 ef e8 fd 40 8e fc 5b 5d 41 5c 41 5d 41 5e 41 5f e9 8e f1 4b fc e8 89 f1 4b fc <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f e9 78 f1 4b fc e8 73 f1 4b fc RSP: 0018:ffffc90001c56448 EFLAGS: 00010246 RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc90001f29000 RDX: 0000000000040000 RSI: ffffffff8526d9f7 RDI: ffff88802fbfc880 RBP: ffff88802fbfc8b8 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff85273e70 R11: 0000000000000000 R12: ffff8880250bbd10 R13: ffff88801c2fe000 R14: ffff88802fbfc8b8 R15: ffff88802fbfc880 FS: 00007f6bfee50700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffea1d04637 CR3: 000000001208b000 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 fib6_clean_node+0x398/0x5c0 net/ipv6/ip6_fib.c:2188 fib6_walk_continue+0x4aa/0x8e0 net/ipv6/ip6_fib.c:2110 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2158 fib6_clean_tree+0xdb/0x120 net/ipv6/ip6_fib.c:2238 __fib6_clean_all+0x120/0x290 net/ipv6/ip6_fib.c:2254 rt6_sync_down_dev net/ipv6/route.c:4780 [inline] rt6_disable_ip+0x77f/0x890 net/ipv6/route.c:4785 addrconf_ifdown.isra.0+0xf6/0x1590 net/ipv6/addrconf.c:3703 addrconf_notify+0x55c/0x23f0 net/ipv6/addrconf.c:3628 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2040 call_netdevice_notifiers_extack net/core/dev.c:2052 [inline] call_netdevice_notifiers net/core/dev.c:2066 [inline] __dev_notify_flags+0x1da/0x2b0 net/core/dev.c:8536 dev_change_flags+0x100/0x160 net/core/dev.c:8572 do_setlink+0x891/0x3a70 net/core/rtnetlink.c:2708 rtnl_group_changelink net/core/rtnetlink.c:3227 [inline] __rtnl_newlink+0xde5/0x16e0 net/core/rtnetlink.c:3381 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3491 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5553 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2345 ___sys_sendmsg+0xf3/0x170 net/socket.c:2399 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 Code: 0d b4 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6bfee4fc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffdaf37058f R14: 00007f6bfee509c0 R15: 000000000119bf8c