syzbot

Dead loop on virtual device ipvlan1, fix it urgently!
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BUG: KMSAN: uninit-value in schedule_debug kernel/sched/core.c:5962 [inline]
BUG: KMSAN: uninit-value in __schedule+0x81d/0x76c0 kernel/sched/core.c:6682
 schedule_debug kernel/sched/core.c:5962 [inline]
 __schedule+0x81d/0x76c0 kernel/sched/core.c:6682
 preempt_schedule_common kernel/sched/core.c:6965 [inline]
 __cond_resched+0xb9/0x130 kernel/sched/core.c:7310
 _cond_resched include/linux/sched.h:2097 [inline]
 __sys_sendmmsg+0x4ed/0x7c0 net/socket.c:2723
 __do_sys_sendmmsg net/socket.c:2736 [inline]
 __se_sys_sendmmsg net/socket.c:2733 [inline]
 __x64_sys_sendmmsg+0xc6/0x150 net/socket.c:2733
 x64_sys_call+0x3ce7/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:308
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable __bpf_net_ctx.i created at:
 sch_handle_egress net/core/dev.c:4407 [inline]
 __dev_queue_xmit+0x45d1/0x5e20 net/core/dev.c:4655
 dev_queue_xmit include/linux/netdevice.h:3355 [inline]
 neigh_hh_output include/net/neighbour.h:523 [inline]
 neigh_output include/net/neighbour.h:537 [inline]
 ip6_finish_output2+0x2496/0x2d50 net/ipv6/ip6_output.c:141

CPU: 0 UID: 0 PID: 4985 Comm: syz.1.11922 Tainted: G        W           6.16.0-rc3-syzkaller-00042-g78f4e737a53e #0 PREEMPT(undef) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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