rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P14480/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=82289, q=2663 ncpus=2)
task:syz.7.1618      state:R  running task     stack:22792 pid:14480 tgid:14470 ppid:14008  task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x16e2/0x4cd0 kernel/sched/core.c:6767
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7090
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5870
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 1b b3 f9 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000c1667d8 EFLAGS: 00000206
RAX: 83be99c7cab1ce00 RBX: 0000000000000000 RCX: 83be99c7cab1ce00
RDX: 0000000000000000 RSI: ffffffff8db42415 RDI: ffffffff8be1ba80
RBP: ffffffff8171a9f5 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8171a9f5 R12: 0000000000000002
R13: ffffffff8e13b860 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4161 [inline]
 slab_alloc_node mm/slub.c:4210 [inline]
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4262
 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:577
 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:668
 __pskb_copy_fclone+0xab/0xf90 net/core/skbuff.c:2170
 __pskb_copy include/linux/skbuff.h:1404 [inline]
 tipc_msg_reassemble+0x10b/0x3b0 net/tipc/msg.c:775
 tipc_mcast_xmit+0x1f0/0x1850 net/tipc/bcast.c:392
 tipc_send_group_bcast+0x79e/0xa70 net/tipc/socket.c:1130
 __tipc_sendmsg+0x2d7/0x2960 net/tipc/socket.c:1432
 tipc_sendmsg+0x55/0x70 net/tipc/socket.c:1399
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:727
 ____sys_sendmsg+0x52d/0x830 net/socket.c:2566
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620
 __sys_sendmmsg+0x227/0x430 net/socket.c:2709
 __do_sys_sendmmsg net/socket.c:2736 [inline]
 __se_sys_sendmmsg net/socket.c:2733 [inline]
 __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2733
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcd4258e969
RSP: 002b:00007fcd43373038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fcd427b6160 RCX: 00007fcd4258e969
RDX: 0400000000000181 RSI: 00002000000030c0 RDI: 0000000000000003
RBP: 00007fcd42610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 9200000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fcd427b6160 R15: 00007ffde023a468
 </TASK>