rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P1459/3:b..l P19805/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=109557, q=8756 ncpus=2)
task:syz.5.3213      state:D stack:27240 pid:19805 tgid:19789 ppid:8726   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x16d9/0x5700 kernel/sched/core.c:7270
 __schedule_loop kernel/sched/core.c:7347 [inline]
 schedule_rtlock+0x30/0x70 kernel/sched/core.c:7426
 rtlock_slowlock_locked+0x35c9/0x3c20 kernel/locking/rtmutex.c:1895
 rtlock_slowlock kernel/locking/rtmutex.c:1922 [inline]
 rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
 __rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
 rt_spin_lock+0x165/0x400 kernel/locking/spinlock_rt.c:57
 spin_lock_bh include/linux/spinlock_rt.h:90 [inline]
 lock_sock_nested+0x7e/0x130 net/core/sock.c:3849
 lock_sock include/net/sock.h:1713 [inline]
 tipc_recvmsg+0x154/0x1400 net/tipc/socket.c:1904
 sock_recvmsg_nosec net/socket.c:1151 [inline]
 sock_recvmsg+0x196/0x1e0 net/socket.c:1173
 ____sys_recvmsg+0x1f2/0x4b0 net/socket.c:2933
 ___sys_recvmsg+0x213/0x5a0 net/socket.c:2975
 __sys_recvmsg net/socket.c:3008 [inline]
 __do_sys_recvmsg net/socket.c:3014 [inline]
 __se_sys_recvmsg net/socket.c:3011 [inline]
 __x64_sys_recvmsg+0x1b4/0x290 net/socket.c:3011
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4e0230e159
RSP: 002b:00007f4e00101028 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f4e02596270 RCX: 00007f4e0230e159
RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0000000000000004
RBP: 00007f4e023a5024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4e02596308 R14: 00007f4e02596270 R15: 00007ffc7a82dc98
 </TASK>
task:kworker/u8:9    state:R  running task     stack:20488 pid:1459  tgid:1459  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: tipc_send tipc_conn_send_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5520 [inline]
 __schedule+0x16d9/0x5700 kernel/sched/core.c:7270
 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7592
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x910 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:unwind_next_frame+0x1202/0x2550 arch/x86/kernel/unwind_orc.c:670
Code: 24 30 42 0f b6 04 20 84 c0 4c 8b 04 24 0f 85 46 0e 00 00 42 0f b6 44 25 00 84 c0 0f 85 62 0e 00 00 0f b7 32 c1 ee 04 83 e6 0f <83> fe 08 0f 84 6c 07 00 00 83 fe 04 0f 84 f9 06 00 00 85 f6 0f 85
RSP: 0018:ffffc90006d16460 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc90006d16558 RCX: 0000000000000000
RDX: ffffffff9043cdac RSI: 0000000000000008 RDI: ffffc90006d16568
RBP: 1ffffffff20879b5 R08: ffffc90006d17e80 R09: 0000000000000000
R10: ffffc90006d16558 R11: fffff52000da2cad R12: dffffc0000000000
R13: ffffffff9043cda8 R14: ffffc90006d16508 R15: ffffc90006d16550
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2748 [inline]
 slab_free mm/slub.c:6499 [inline]
 kmem_cache_free+0x187/0x6d0 mm/slub.c:6626
 kfree_skb_reason include/linux/skbuff.h:1323 [inline]
 kfree_skb include/linux/skbuff.h:1332 [inline]
 tipc_group_filter_msg+0xaba/0x1630 net/tipc/group.c:568
 tipc_sk_filter_rcv+0x3031/0x3240 net/tipc/socket.c:2360
 tipc_sk_enqueue net/tipc/socket.c:2450 [inline]
 tipc_sk_rcv+0x8c4/0x2b30 net/tipc/socket.c:2502
 tipc_node_xmit+0x218/0xf10 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x2da/0x420 net/tipc/node.c:1788
 tipc_sk_rcv+0x273c/0x2b30 net/tipc/socket.c:2506
 tipc_topsrv_kern_evt net/tipc/topsrv.c:630 [inline]
 tipc_conn_send_to_sock net/tipc/topsrv.c:286 [inline]
 tipc_conn_send_work+0x6cd/0xa50 net/tipc/topsrv.c:306
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>