------------[ cut here ]------------ WARNING: CPU: 1 PID: 17509 at drivers/net/netdevsim/fib.c:831 nsim_fib6_event_init drivers/net/netdevsim/fib.c:831 [inline] WARNING: CPU: 1 PID: 17509 at drivers/net/netdevsim/fib.c:831 nsim_fib6_prepare_event drivers/net/netdevsim/fib.c:947 [inline] WARNING: CPU: 1 PID: 17509 at drivers/net/netdevsim/fib.c:831 nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:1003 [inline] WARNING: CPU: 1 PID: 17509 at drivers/net/netdevsim/fib.c:831 nsim_fib_event_nb+0xb9d/0x10d0 drivers/net/netdevsim/fib.c:1043 Modules linked in: CPU: 1 UID: 0 PID: 17509 Comm: syz.0.2823 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:nsim_fib6_event_init drivers/net/netdevsim/fib.c:831 [inline] RIP: 0010:nsim_fib6_prepare_event drivers/net/netdevsim/fib.c:947 [inline] RIP: 0010:nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:1003 [inline] RIP: 0010:nsim_fib_event_nb+0xb9d/0x10d0 drivers/net/netdevsim/fib.c:1043 Code: 24 20 48 8b 6c 24 38 e8 01 5a ca fa e8 fc 59 ca fa 89 de 44 89 ef e8 72 54 ca fa 41 39 dd 0f 84 cb fd ff ff e8 e4 59 ca fa 90 <0f> 0b 90 e9 bd fd ff ff e8 d6 59 ca fa 48 8d 7d 38 be 01 00 00 00 RSP: 0018:ffffc9000c017028 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88805237782c RCX: 0000000000000000 RDX: ffff888051f18000 RSI: ffffffff86f28dfc RDI: ffff888052377818 RBP: ffff8880236b9000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff8b60712d R12: ffffc9000c017180 R13: 0000000000000001 R14: ffff88802f664700 R15: ffff888052377800 FS: 00007f92e20886c0(0000) GS:ffff888124b05000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f92e2066f98 CR3: 000000001cf47000 CR4: 00000000003526f0 Call Trace: notifier_call_chain+0xbc/0x410 kernel/notifier.c:85 atomic_notifier_call_chain+0x71/0x1c0 kernel/notifier.c:223 call_fib_notifiers+0x33/0x70 net/core/fib_notifier.c:35 call_fib6_multipath_entry_notifiers+0x112/0x170 net/ipv6/ip6_fib.c:425 ip6_route_multipath_add+0xb4f/0x1bd0 net/ipv6/route.c:5525 inet6_rtm_newroute+0xe4/0x1a0 net/ipv6/route.c:5647 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6951 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x8c8/0xdd0 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xa98/0xc70 net/socket.c:2630 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2684 __sys_sendmmsg+0x200/0x420 net/socket.c:2773 __do_sys_sendmmsg net/socket.c:2800 [inline] __se_sys_sendmmsg net/socket.c:2797 [inline] __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2797 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f92e118f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f92e2088038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f92e13e6090 RCX: 00007f92e118f749 RDX: 04000000000001f2 RSI: 0000200000000000 RDI: 0000000000000007 RBP: 00007f92e1213f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f92e13e6128 R14: 00007f92e13e6090 R15: 00007ffc35f49108