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:5917 [inline]
BUG: KMSAN: uninit-value in __schedule+0x82d/0x7790 kernel/sched/core.c:6838
 schedule_debug kernel/sched/core.c:5917 [inline]
 __schedule+0x82d/0x7790 kernel/sched/core.c:6838
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x17d/0x3c0 kernel/sched/core.c:7058
 schedule_timeout+0x6d/0x240 kernel/time/sleep_timeout.c:75
 sctp_wait_for_connect+0x477/0x820 net/sctp/socket.c:9368
 sctp_sendmsg_to_asoc+0x223a/0x2260 net/sctp/socket.c:1886
 sctp_sendmsg+0x3910/0x49f0 net/sctp/socket.c:2032
 inet_sendmsg+0x269/0x2a0 net/ipv4/af_inet.c:851
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x278/0x3d0 net/socket.c:729
 ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2614
 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2668
 __sys_sendmsg net/socket.c:2700 [inline]
 __do_sys_sendmsg net/socket.c:2705 [inline]
 __se_sys_sendmsg net/socket.c:2703 [inline]
 __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2703
 x64_sys_call+0x1dfd/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:47
 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+0x4567/0x5e60 net/core/dev.c:4655
 dev_queue_xmit include/linux/netdevice.h:3358 [inline]
 neigh_hh_output include/net/neighbour.h:531 [inline]
 neigh_output include/net/neighbour.h:545 [inline]
 ip6_finish_output2+0x2496/0x2d50 net/ipv6/ip6_output.c:141

CPU: 0 UID: 0 PID: 10549 Comm: syz.6.1374 Tainted: G        W           6.16.0-syzkaller-11845-ga530a36bb548 #0 PREEMPT(none) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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